C/1997 BA6 (Spacewatch)
Epoch 1999 Dec. 8.0 TT = JDT 2451520.5
T 1999 Nov. 27.56637 TT Nakano
q 3.4362736 (2000.0) P Q
z +0.0003665 Peri. 285.93573 +0.01053529 +0.76574025
+/-0.0000016 Node 317.66379 +0.00179374 -0.64311279
e 0.9987407 Incl. 72.71475 -0.99994289 +0.00691411
From 503 observations 1997 Jan. 11-2004 Sept. 15, mean residual 0".76.
Nongravitational parameters Y1 = +6.48 +/- 0.20, Y2 = +0.1388 +/- 0.0791.
Sublimating molecule = CO (or N2) using Yabushita's theory (MN 283, 347).
(1/a)org.= +0.000030, (1/a)fut.= +0.000398 (+/-0.000002), Q= 9.
Residuals in seconds of arc
1997/ 980221 118 0.7+ 0.0 010602 349 0.3+ 0.7+
970111 691 0.7- 0.1- 980221 118 0.6+ 0.2- 010615 704 1.5+ 0.5-
970111 691 0.8- 0.4+ 980221 118 0.5+ 0.2- 010615 704 1.2+ 0.6+
970111 691 0.6- 0.2- 980223 118 0.6+ 0.5- 010615 704 1.6+ 0.5+
970131 691 0.7- 0.4- 980223 118 0.9+ 0.4- 010615 704 1.8+ 0.9+
970131 691 0.2- 0.1- 980223 118 0.8+ 0.4- 010615 704 0.2+ 1.8+
970131 691 0.5- 0.4- 980302 402 0.0 0.1- 010615 608 1.9+ 1.8+
970202 691 0.8- 0.0 980302 402 0.1+ 0.2- 010615 608 2.0+ 2.0+
970202 691 1.0- 0.0 980302 402 0.2+ 0.7- 010615 608 1.4+ 1.8+
970202 691 0.8- 0.0 980317 897 2.1+ 0.9+ 010619 320 0.7+ 0.2+
970203 691 1.1- 0.3- 980317 897 0.6+ 0.6+ 010619 320 0.8+ 0.0
970203 691 1.0- 0.3- 980318 402 0.4+ 0.0 010619 320 0.7+ 0.1+
970203 691 0.6- 0.3- 980318 402 0.8+ 0.0 010619 320 1.0+ 0.1+
970206 557 0.2- 0.7+ 980318 402 0.4+ 0.1- 010620 320 1.5+ 0.2-
970206 557 0.4+ 0.3+ 980318 360 0.1+ 0.4- 010620 320 1.5+ 0.1+
970206 557 0.6- 1.8+ 980318 360 0.0 0.3- 010620 320 0.8+ 0.1-
970207 691 0.5- 0.4- 980322 118 0.8+ 0.3+ 010620 320 0.8+ 0.1+
970207 691 0.9- 0.1- 980322 118 0.5+ 0.1+ 010622 682 0.6- 0.3-
970207 608 1.8- 0.8+ 980322 118 0.4+ 0.1+ 010622 682 1.0+ 0.1-
970207 691 0.6- 0.2- 980329 046 0.1+ 0.4+ 010622 682 1.1- 0.3-
970207 608 0.4+ 1.4+ 980329 046 0.3+ 0.3+ 010624 704 (2.8+ 1.0-)
970208 709 0.9+ 0.1- 980329 046 0.0 0.1+ 010624 704 1.3+ 0.7+
970208 709 0.7+ 0.0 980419 360 0.1+ 0.5- 010624 704 (2.2- 1.8+)
970208 709 0.4+ 0.1+ 980419 360 0.1+ 0.2- 010712 349 0.1+ 0.5-
970208 709 1.0+ 0.2+ 980420 402 0.3+ 0.7- 010712 349 0.3- 0.5-
970208 709 1.4+ 0.4+ 980420 402 0.5+ 0.1+ 010712 349 0.1+ 0.0
970208 608 0.3+ 0.2+ 980420 402 0.4+ 0.5+ 010713 355 0.9+ 0.5-
970208 608 0.8+ 0.5- 980420 867 0.4+ 0.8+ 010713 355 1.2+ 0.0
970209 046 1.2+ 0.0 980420 867 0.4+ 0.6+ 010713 355 1.0+ 0.3-
970209 046 0.5+ 0.1+ 980507 046 0.8+ 0.3- 010716 699 (3.3+ 2.6+)
970209 046 0.2+ 0.6+ 980507 046 0.3+ 0.1- 010716 699 (3.6+ 2.2+)
970209 046 0.4- 0.4- 980507 046 0.1- 0.2+ 010716 699 (2.2+ 2.2+)
970209 046 0.6- 1.1+ 980507 046 0.5- 0.2+ 010716 699 (2.8+ 3.9+)
970210 709 0.3+ 0.2+ 980520 402 (2.2- 1.3-) 010720 704 (3.2+ 0.3-)
970210 709 0.3+ 0.3+ 980520 402 0.3- 1.3- 010720 704 1.4+ 2.1-
970210 709 0.3+ 0.4+ 980520 402 1.1+ 1.9+ 010720 704 0.1+ 1.2-
970210 709 0.2+ 0.1+ 980528 860 1.6+ 1.4- 010720 704 2.0- 0.6-
970210 709 0.1- 0.0 980528 860 2.1+ 2.0- 010722 204 0.8+ 0.7+
970210 046 0.0 0.6- 981115 360 1.1- 0.5- 010722 204 1.7+ 1.1+
970210 046 0.1+ 0.3+ 981115 360 1.1- 0.6- 010724 360 0.5+ 0.6-
970210 046 0.2+ 1.4+ 981128 360 0.1- 0.3- 010724 360 0.4+ 0.6-
970211 709 0.0 0.1- 981128 360 0.1+ 0.2- 010726 152 0.5- 0.2+
970211 709 0.3+ 0.1- 981216 360 0.3- 0.7- 010726 152 0.1- 0.2+
970211 709 0.4- 0.1- 981216 360 0.3- 0.9- 010726 152 0.1- 0.4+
970211 709 0.0 0.1+ 981217 897 0.8+ 0.3- 010728 152 0.3- 0.4+
970211 709 0.0 0.2- 981217 897 0.3- 0.1- 010729 152 0.1+ 0.8+
970211 709 0.2+ 0.2- 981217 897 0.7- 0.2+ 010730 152 0.2+ 0.6+
970211 709 0.4+ 0.1+ 981224 360 0.3- 0.7- 010730 152 0.0 0.8+
970213 711 0.4+ 0.2- 981224 360 0.3- 0.5- 010730 152 0.1- 0.7+
970213 360 0.1+ 0.8+ 1999/ 010730 046 0.0 1.1+
970213 402 1.6+ 0.1+ 990120 426 0.3- 0.5- 010730 046 0.1+ 0.8+
970213 402 0.4+ 1.2+ 990120 426 0.0 0.0 010730 046 0.0 1.1+
970213 360 0.4- 0.4+ 990120 426 0.3- 0.0 010730 046 0.3- 1.0+
970213 402 0.3+ 1.7+ 990120 426 0.3- 0.0 010730 046 0.4- 0.9+
970213 360 0.2+ 0.2+ 990207 897 0.7+ 1.8- 010731 118 0.4- 0.0
970213 587 0.9+ 0.1- 990207 897 (0.9- 2.9-) 010731 118 0.7- 0.1+
970214 587 0.5+ 0.4+ 990224 844 0.5- 0.1+ 010731 118 0.0 0.1-
970214 587 0.3+ 0.0 990224 844 0.3- 0.2- 010813 151 0.4+ 0.0
970227 402 0.8+ 0.6+ 990224 844 0.9- 0.2+ 010813 151 0.5+ 0.0
970227 402 0.1- 0.5+ 990318 860 0.1+ 0.2+ 010813 151 0.1+ 0.1+
970227 402 0.3- 0.8+ 990318 860 0.1+ 0.3- 010814 402 0.4+ 0.2-
970301 402 0.1+ 0.5- 990318 860 0.3+ 0.3- 010814 402 0.3+ 0.4-
970301 402 0.8- 1.0+ 990323 829 1.2+ 0.8- 010814 402 0.3+ 0.4-
970301 402 0.8+ 0.2- 990323 829 1.4+ 0.9- 010817 170 0.1- 0.5+
970301 360 0.2+ 0.2- 990325 808 1.9- 0.4+ 010817 170 0.4- 0.6+
970301 360 0.0 0.1- 990325 808 0.1- 0.6+ 010817 170 0.1- 1.0+
970301 360 1.2+ 0.5- 990325 808 0.4+ 1.4- 010820 704 1.7+ 0.6-
970303 696 0.3+ 0.1- 990406 860 0.0 0.1+ 010820 704 1.9- 1.1+
970303 696 0.1+ 0.0 990406 860 0.2- 0.5- 010820 704 1.1- 0.5-
970303 696 0.2+ 0.1- 990406 860 0.3- 0.2- 010820 704 0.4- 0.1+
970304 360 0.2+ 0.4+ 990410 844 0.5+ 0.0 010822 170 1.3- 0.0
970304 402 1.0+ 0.8+ 990410 844 0.4+ 0.2- 010824 699 1.0+ 0.4+
970304 402 0.4+ 0.0 990410 844 0.6+ 0.2- 010824 699 (2.2+ 1.5+)
970304 402 0.5- 0.6+ 990410 844 0.8+ 0.1+ 010824 699 0.7+ 1.3+
970304 360 0.4+ 0.6+ 990419 422 0.3+ 0.3- 010824 699 1.1+ 0.6+
970304 360 0.4+ 0.6+ 990419 422 0.2+ 0.4- 010827 360 0.3- 0.7-
970305 867 0.3- 0.3- 990419 422 0.4+ 0.3- 010827 360 0.3- 0.5-
970305 867 0.0 0.0 990503 844 0.1+ 0.8+ 010911 170 0.0 0.3-
970305 867 0.4+ 0.1+ 990503 844 0.5+ 0.2+ 010911 170 1.1+ 0.3-
970305 046 0.4+ 0.3+ 990503 844 0.2- 0.6- 010916 360 0.3- 0.3-
970305 046 0.8+ 0.1+ 990508 844 0.3+ 0.3+ 010916 360 0.1- 0.3-
970305 046 0.4+ 0.0 990508 844 0.9+ 0.2- 010922 349 0.4- 0.0
970307 696 1.4+ 0.0 990508 844 0.3+ 0.2- 010922 349 0.3+ 0.5+
970307 696 1.4+ 0.1+ 990511 844 0.1+ 0.6- 010922 349 0.3- 0.3+
970310 587 1.2+ 0.7- 990511 844 0.2- 1.6- 010923 170 1.2+ 0.6-
970310 587 0.6+ 1.4+ 990606 844 0.9+ 0.3+ 010923 170 (0.8- 2.4-)
970311 402 0.8- 0.7- 990606 844 0.9+ 0.2+ 010923 170 0.4- 0.0
970311 402 0.9- 1.2+ 990606 844 0.6+ 0.4+ 010923 213 1.3- 1.8-
970317 402 0.0 0.7- 990607 844 1.1+ 0.3+ 010923 213 1.9+ 1.5-
970317 402 0.3- 0.6- 990613 844 1.0+ 0.3- 010923 213 0.1+ 1.3-
970317 402 0.2- 1.0+ 990613 844 0.6+ 0.0 010923 213 0.6- 0.8-
970327 658 0.6- 1.3- 990613 844 0.3+ 0.2+ 010923 213 1.7+ 0.2+
970327 658 1.2- 0.3+ 990613 844 0.3+ 0.2- 010925 704 (3.1+ 1.3+)
970327 658 0.5+ 1.8+ 991007 413 1.3- 0.6+ 010925 704 0.4+ 0.7+
970331 360 0.2- 0.1+ 991007 413 1.3- 0.7+ 010925 704 0.8+ 0.5+
970331 360 0.3+ 0.5+ 991007 413 1.1- 0.5+ 010925 704 1.1+ 1.4+
970331 360 0.5+ 0.2+ 991112 474 2.1- 1.3+ 010925 704 0.7- 0.6+
970331 867 0.2- 0.7+ 991112 474 (2.3- 0.5+) 010926 170 0.1- 0.2-
970331 867 0.5- 0.7+ 991112 474 2.1- 0.2+ 010926 170 0.5+ 0.5-
970331 867 0.6+ 0.2+ 2000/ 011004 213 2.0+ 1.9-
970504 360 0.2- 0.9- 000228 413 0.1+ 0.4- 011004 213 (1.2- 2.5-)
970504 360 1.3- 0.2+ 000228 413 0.3+ 0.3- 011004 213 (2.5- 0.1-)
970504 360 0.0 0.2- 000304 474 1.2+ 0.9- 011004 213 0.7- 0.4-
971103 360 0.8- 1.2- 000304 474 0.7+ 0.8- 011007 213 0.7- 1.4-
971103 360 1.1- 1.2- 000304 474 0.6+ 0.8- 011007 213 1.1- 0.7-
971103 360 0.5- 1.2- 000501 860 0.5- 0.4+ 011007 213 0.2+ 1.0-
971106 402 1.8- 1.1- 000501 860 1.2+ 0.3- 011007 213 1.2- 0.3+
971106 402 0.9- 1.7- 000501 860 0.4+ 0.0 011008 170 0.6- 0.7-
971106 402 1.1- 0.6- 000708 467 0.2+ 0.2+ 011008 170 0.1- 0.2-
971108 867 1.1- 0.8- 000708 467 0.2+ 0.1- 011011 170 0.7- 0.1-
971108 867 1.1- 0.7- 000708 467 0.2+ 0.2+ 011011 170 2.1- 0.3-
971108 867 0.9- 0.8- 000710 467 1.1+ 0.5- 011013 349 1.6+ 0.9+
971203 864 2.0- 0.3+ 000710 467 0.6+ 0.0 011013 349 0.6+ 2.0+
971203 864 1.8- 0.6+ 000710 467 0.4+ 0.8+ 011013 349 0.3- 0.6+
971204 402 1.3- 0.4- 000727 474 (1.2- 2.9+) 011021 170 0.6- 0.8-
971204 402 1.3- 0.1- 000727 474 0.1+ 1.7+ 011107 170 0.6- 0.8-
971204 402 1.5- 0.9- 000727 474 0.0 1.5+ 011118 170 1.4+ 1.3+
971204 360 1.1- 0.6- 000728 860 0.1+ 1.1+ 011122 170 1.2- 1.5-
971204 360 1.1- 0.5- 000728 860 0.5+ 1.7+ 011203 170 0.2+ 0.9-
971204 867 1.3- 0.0 000728 860 0.1- 2.0+ 2002/
971204 867 1.6- 0.3- 000729 349 1.3- 0.4+ 020609 360 0.1- 0.1-
971204 867 0.9- 0.4- 000729 349 (0.9+ 2.3+) 020609 360 0.3+ 0.7-
971205 691 (2.4- 0.7-) 000729 349 0.3+ 1.5+ 020610 699 1.0+ 0.3+
971205 691 (2.4- 0.5-) 000822 322 0.1+ 0.5+ 020610 699 0.4+ 0.6+
971205 691 (2.2- 0.4-) 000822 322 0.0 0.1+ 020610 699 0.8+ 0.3+
971206 118 1.4- 0.3- 000822 322 0.1- 0.5+ 020610 699 0.7+ 0.4+
971206 118 1.4- 0.3- 000901 921 (1.6+ 2.4-) 020706 246 0.4+ 0.2-
971224 360 1.1- 0.2- 000902 921 1.2- 1.1- 020706 246 0.5+ 0.0
971224 360 1.1- 0.2- 000902 921 0.8+ 1.5+ 020706 246 0.6+ 0.4-
971230 568 1.2- 0.9- 000902 349 0.5- 1.4+ 020706 246 0.4+ 0.4-
1998/ 000902 349 0.1+ 1.0+ 020706 246 0.6+ 0.4-
980109 897 0.3+ 0.9+ 000902 349 0.3+ 1.8+ 020706 246 0.9+ 0.6-
980109 897 0.9- 1.4- 000905 900 (3.2+ 0.7-) 020708 644 0.5+ 0.6-
980109 897 0.1+ 0.8- 000905 900 (2.6+ 0.7-) 020708 644 0.5+ 0.7-
980118 118 0.7- 0.4- 000917 360 0.6- 1.5- 020708 644 0.4+ 0.6-
980118 118 0.7- 0.3- 000917 360 0.6- 1.2- 020708 644 0.5+ 0.9-
980118 118 0.8- 0.3- 000920 360 0.3+ 1.1+ 020708 644 0.6+ 0.7-
980121 355 0.1- 0.2+ 000920 360 1.0+ 0.4+ 020708 644 0.6+ 0.1+
980121 355 0.6- 0.2+ 000920 322 1.0- 1.3- 020709 246 1.9+ 0.4+
980121 355 1.3- 0.0 000920 322 1.0- 0.6- 020709 246 (2.4+ 0.7+)
980124 118 0.3- 0.2+ 000920 322 0.7- 1.3- 020709 246 (2.5+ 0.4+)
980124 118 0.3- 0.2+ 000927 367 0.9- 0.5+ 020718 644 0.2- 0.4-
980124 118 0.3- 0.2+ 000927 367 0.8- 0.3- 020718 644 0.4+ 0.8-
980125 897 (0.1- 2.4+) 000927 367 0.7- 0.4+ 020718 644 0.9- 0.3-
980125 897 0.7- 0.7+ 000927 367 0.5- 0.2- 020718 644 0.1+ 0.6-
980126 118 0.3- 0.2+ 001001 351 1.5- 0.9+ 020718 644 0.5- 0.2-
980126 118 0.5- 0.2+ 001001 351 1.7- 1.4- 020718 644 0.0 0.3-
980126 587 0.4- 1.3+ 001001 351 0.3- 0.3- 020725 644 0.5- 0.2+
980126 587 0.3- 0.9+ 001009 322 0.2- 0.4- 020725 644 0.3- 0.7+
980126 587 0.4+ 1.5+ 001009 322 0.1- 0.4- 020725 644 0.7- 0.8+
980129 360 0.6- 0.5- 001015 900 0.0 0.6- 020803 859 (0.1+ 2.3+)
980129 360 0.6- 0.4- 001015 900 0.5- 0.9- 020803 859 1.0- 1.3+
980202 360 0.3- 0.5- 001026 322 0.3- 1.3- 020804 213 1.1- 0.9+
980202 360 0.2- 0.4- 001026 322 0.4- 0.4- 020804 213 1.5- 1.4-
980203 046 0.4- 0.0 001026 322 0.2- 0.6- 020804 213 (2.8+ 0.6+)
980203 046 0.4- 0.7- 001027 467 0.5- 0.3- 020804 704 1.6+ 0.1-
980203 046 0.1- 0.3- 001027 467 0.3- 0.7- 020804 704 0.0 0.3+
980204 118 0.5- 0.2+ 001029 320 0.3- 0.1+ 020804 704 0.6- 0.0
980204 118 0.6- 0.3+ 001030 320 0.1+ 1.8+ 020806 859 1.8- 0.7+
980205 046 0.4- 0.5- 001030 320 0.0 1.5+ 020806 859 1.0+ 1.6-
980205 046 0.4- 0.3- 001105 349 0.6- 0.2- 020806 859 (4.8+ 6.2-)
980205 046 0.0 0.1- 001105 349 0.2- 0.1+ 020814 215 0.5- 0.3-
980205 118 0.2- 0.3+ 001109 903 2.0- 0.9+ 020814 215 0.2+ 0.5-
980205 118 0.2- 0.3+ 001109 903 1.7- 0.6+ 020814 215 0.6- 0.1+
980205 118 0.3- 0.2+ 001109 903 (1.8- 2.3+) 020817 704 0.0 0.1-
980206 118 0.3- 0.6+ 001115 860 0.7- 0.8- 020817 704 0.7+ 0.2-
980206 118 0.2- 0.4+ 001115 860 0.1+ 1.3- 020817 704 0.0 0.0
980207 118 0.3- 0.1+ 001115 860 0.1+ 0.7- 020817 704 1.5- 0.9+
980207 118 0.4- 0.2- 001209 349 1.1+ 0.7+ 020912 360 0.4- 0.1+
980207 118 0.4- 0.0 001209 349 1.6- 0.8+ 020912 360 0.9- 0.1-
980207 118 0.4+ 0.1+ 2001/ 020918 644 0.6- 0.5-
980207 118 0.2- 0.4+ 010324 318 (4.6+ 1.0+) 020918 644 0.8- 1.4-
980209 118 0.5- 0.1+ 010511 349 1.4+ 0.5- 020929 204 0.8+ 0.4+
980209 118 0.5- 0.1+ 010511 349 (2.4+ 0.4-) 2003/
980209 118 0.8- 0.1+ 010511 349 (2.7+ 0.6-) 030823 461 1.2- 0.7-
980217 897 1.9+ 0.0 010511 349 (2.5+ 0.9-) 030823 461 1.9- 0.1-
980217 897 0.2- 0.8- 010525 402 0.5+ 0.3- 030823 461 (2.9- 1.1-)
980217 897 0.2- 0.5+ 010525 402 0.9+ 0.2+ 2004/
980218 867 0.2- 0.1+ 010525 402 0.6+ 0.7- 040902 568 1.7- 0.8-
980218 867 0.0 0.2+ 010602 349 1.8+ 0.6+ 040902 568 1.9- 0.4-
980221 360 0.2+ 0.8- 010602 349 1.7+ 0.1- 040915 568 1.6- 0.6-
980221 360 0.2+ 0.6- 010602 349 0.7+ 0.1+ 040915 568 1.9- 0.8-
NAKANO
**** Don't distribute anyone except personal use only ****
(C) Copyright 2004 OAA/ComputingSection
write mail from CFAD0::NAKANO on 2004-10-04 01:08:15(JST).
*** Effects by non-gravitation are seen in residuals ***
C/1997 BA6 (Spacewatch)
Epoch 1999 Dec. 8.0 TT = JDT 2451520.5
T 1999 Nov. 27.56736 TT Nakano
q 3.4364349 (2000.0) P Q
z +0.0003038 Peri. 285.93615 +0.01054137 +0.76573959
+/-0.0000004 Node 317.66375 +0.00178998 -0.64311350
e 0.9989560 Incl. 72.71482 -0.99994284 +0.00692118
From 459 observations 1997 Jan. 11-2002 Sept. 29, mean residual 0".92.
(1/a)org.= -0.000012, (1/a)fut.= +0.000360 (+/-0.000000), Q= 9.
NAKANO
**** Don't distribute anyone except personal use only ****
(C) Copyright 2003 OAA/ComputingSection
write mail from CFAD0::NAKANO on 2003-12-14 18:52:00(JST).
C/1997 BA6 (Spacewatch)
Epoch 1999 Dec. 8.0 TT = JDT 2451520.5
T 1999 Nov. 27.56756 TT Nakano
q 3.4364347 (2000.0) P Q
z +0.0003041 Peri. 285.93617 +0.01054220 +0.76573947
+/-0.0000005 Node 317.66376 +0.00179037 -0.64311365
e 0.9989549 Incl. 72.71487 -0.99994283 +0.00692156
From 418 observations 1997 Jan. 11-2002 June 10, mean residual 0".92.
(1/a)org.= -0.000011, (1/a)fut.= +0.000360 (+/-0.000000), Q= 9.
NAKANO
**** Don't distribute anyone except personal use only ****
(C) Copyright 2002 OAA/ComputingSection
write mail from CFAD0::NAKANO on 2002-06-24 23:03:41(JST).
C/1997 BA6 (Spacewatch)
Epoch 1999 Dec. 8.0 TT = JDT 2451520.5
T 1999 Nov. 27.56763 TT Nakano
q 3.4364338 (2000.0) P Q
z +0.0003041 Peri. 285.93619 +0.01054261 +0.76573948
+/-0.0000005 Node 317.66376 +0.00179033 -0.64311362
e 0.9989549 Incl. 72.71488 -0.99994282 +0.00692190
From 395 observations 1997 Jan. 11-2001 Sept. 26, mean residual 0".89.
NAKANO
**** Don't distribute anyone except personal use only ****
(C) Copyright 2001 OAA/ComputingSection
write mail from CFAD0::NAKANO on 2001-10-02 04:10:33(JST).
C/1997 BA6 (Spacewatch)
Epoch 1999 Dec. 8.0 TT = JDT 2451520.5
T 1999 Nov. 27.56835 TT Nakano
q 3.4364320 (2000.0) P Q
z +0.0003050 Peri. 285.93627 +0.01054400 +0.76573946
+/-0.0000005 Node 317.66377 +0.00178960 -0.64311363
e 0.9989520 Incl. 72.71490 -0.99994281 +0.00692344
From 371 observations 1997 Jan. 11-2001 Aug. 24, mean residual 0".91.
NAKANO
**** Don't distribute anyone except personal use only ****
(C) Copyright 2001 OAA/ComputingSection
write mail from CFAD0::NAKANO on 2001-08-29 00:52:52(JST).
**** Observations after 1999 are NOT bad. These seem to be due to Non- ****
**** gravitational effects ****
C/1997 BA6 (Spacewatch)
Epoch 1999 Dec. 8.0 TT = JDT 2451520.5
T 1999 Nov. 27.56894 TT Nakano
q 3.4364304 (2000.0) P Q
z +0.0003059 Peri. 285.93636 +0.01054510 +0.76573941
+/-0.0000006 Node 317.66376 +0.00178862 -0.64311368
e 0.9989487 Incl. 72.71490 -0.99994280 +0.00692491
From 347 observations 1997 Jan. 11-2001 July 24, mean residual 0".92.
NAKANO
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(C) Copyright 2001 OAA/ComputingSection
write mail from CFAD0::NAKANO on 2001-07-31 23:54:42(JST).
C/1997 BA6 (Spacewatch)
Epoch 1999 Dec. 8.0 TT = JDT 2451520.5
T 1999 Nov. 27.57058 TT Nakano
q 3.4364245 (2000.0) P Q
z +0.0003083 Peri. 285.93661 +0.01054852 +0.76573912
+/-0.0000007 Node 317.66375 +0.00178601 -0.64311397
e 0.9989405 Incl. 72.71492 -0.99994277 +0.00692920
From 330 observations 1997 Jan. 11-2001 June 24, mean residual 0".88.
NAKANO
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(C) Copyright 2001 OAA/ComputingSection
write mail from CFAD0::NAKANO on 2001-07-03 00:46:31(JST).
*** Comet shows some large non-gravitational effects, ***
*** but recent theory can't solve them. ***
C/1997 BA6 (Spacewatch)
Epoch 1999 Dec. 8.0 TT = JDT 2451520.5
T 1999 Nov. 27.56989 TT Nakano
q 3.4364200 (2000.0) P Q
z +0.0003060 Peri. 285.93640 +0.01054619 +0.76573843
+/-0.0000021 Node 317.66370 +0.00178943 -0.64311484
e 0.9989485 Incl. 72.71500 -0.99994279 +0.00692521
From 329 observations 1997 Jan. 11-2001 May 25, mean residual 1".02.
NAKANO
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write mail from CFAD0::NAKANO on 2001-06-02 22:39:55(JST).
*** There are some effects by non-gravitation ***
C/1997 BA6 (Spacewatch)
Epoch 1999 Dec. 8.0 TT = JDT 2451520.5
T 1999 Nov. 27.57949 TT Nakano
q 3.4363996 (2000.0) P Q
z +0.0003209 Peri. 285.93782 +0.01056468 +0.76573894
+/-0.0000010 Node 317.66375 +0.00177234 -0.64311397
e 0.9988972 Incl. 72.71491 -0.99994262 +0.00695037
From 305 observations 1997 Jan. 11-2000 Nov. 5, mean residual 0".74.
NAKANO
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(C) Copyright 2000 OAA/ComputingSection
write mail from CFAD0::NAKANO on 2000-11-08 03:10:19(JST).
C/1997 BA6 (Spacewatch)
Epoch 1999 Dec. 8.0 TT = JDT 2451520.5
T 1999 Nov. 27.58067 TT Nakano
q 3.4363924 (2000.0) P Q
z +0.0003227 Peri. 285.93805 +0.01056743 +0.76573885
+/-0.0000015 Node 317.66374 +0.00176950 -0.64311402
e 0.9988911 Incl. 72.71489 -0.99994260 +0.00695430
From 287 observations 1997 Jan. 11-2000 Sept. 27, mean residual 0".69.
NAKANO
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write mail from CFAD0::NAKANO on 2000-10-10 00:33:34(JST).
◎C/1997 BA6の軌道と予報位置です
北半球で７月29日に上尾の門田健一氏によって，13.1等で再び観測されたあと，
９月２日に13.9等（門田），５日に14.0等（井狩康一），17日に13.4等，20日に
13.2等（中村彰正）と追跡されています．我国以外，北半球からの観測は，まだ，
報告されていません．
C/1997 BA6 (Spacewatch)
Epoch 1999 Dec. 8.0 TT = JDT 2451520.5
T 1999 Nov. 27.58024 TT Nakano
q 3.4363847 (2000.0) P Q
z +0.0003222 Peri. 285.93812 +0.01056963 +0.76573901
+/-0.0000011 Node 317.66378 +0.00176986 -0.64311382
e 0.9988929 Incl. 72.71498 -0.99994257 +0.00695576
From 291 observations 1997 Jan. 11-2000 Sept.20, weighting mean residual 0".76.
Date/ TT R.A.(2000) Decl. Delta r Daily motion Mag. Moon Age
h h m ｡ , , / PA ｡ m1 ｡
2000 Sept.25 12 20 29.01 -39 34.3 3.874 4.397 13.4 / 335 13.9 145 .07
26 12 20 28.53 -39 22.2 3.893 4.402 13.3 / 336 13.9 132 .02
27 12 20 28.07 -39 10.0 3.912 4.408 13.1 / 338 13.9 119 .00
28 12 20 27.64 -38 57.9 3.931 4.413 13.0 / 339 13.9 106 .01
29 12 20 27.24 -38 45.7 3.950 4.419 12.9 / 340 13.9 93 .04
30 12 20 26.86 -38 33.6 3.969 4.424 12.8 / 341 14.0 80 .09
Oct. 1 12 20 26.50 -38 21.6 3.989 4.430 12.7 / 342 14.0 68 .15
2 12 20 26.17 -38 09.5 4.009 4.435 12.6 / 343 14.0 56 .23
3 12 20 25.86 -37 57.5 4.028 4.441 12.4 / 344 14.0 45 .32
4 12 20 25.58 -37 45.5 4.048 4.446 12.3 / 345 14.0 34 .41
5 12 20 25.32 -37 33.6 4.068 4.452 12.2 / 347 14.0 25 .50
6 12 20 25.08 -37 21.7 4.089 4.457 12.2 / 348 14.0 18 .60
7 12 20 24.86 -37 09.8 4.109 4.463 12.1 / 349 14.1 17 .69
8 12 20 24.67 -36 58.0 4.129 4.468 12.0 / 350 14.1 24 .77
9 12 20 24.50 -36 46.2 4.150 4.474 11.9 / 351 14.1 33 .85
10 12 20 24.34 -36 34.4 4.170 4.479 11.8 / 352 14.1 45 .91
11 12 20 24.21 -36 22.7 4.191 4.485 11.7 / 353 14.1 56 .96
12 12 20 24.10 -36 11.1 4.212 4.490 11.7 / 355 14.1 69 .99
13 12 20 24.01 -35 59.4 4.233 4.496 11.6 / 356 14.2 81 1.00
14 12 20 23.94 -35 47.9 4.254 4.501 11.5 / 357 14.2 94 .98
15 12 20 23.89 -35 36.4 4.275 4.507 11.5 / 358 14.2 108 .94
16 12 20 23.86 -35 24.9 4.296 4.513 11.4 / 359 14.2 121 .88
17 12 20 23.84 -35 13.5 4.317 4.518 11.4 / 0 14.2 134 .80
18 12 20 23.85 -35 02.1 4.338 4.524 11.3 / 1 14.2 147 .70
19 12 20 23.87 -34 50.8 4.360 4.529 11.3 / 3 14.3 159 .59
20 12 20 23.91 -34 39.5 4.381 4.535 11.2 / 4 14.3 166 .48
21 12 20 23.97 -34 28.3 4.402 4.541 11.2 / 5 14.3 162 .37
22 12 20 24.04 -34 17.1 4.424 4.546 11.2 / 6 14.3 151 .26
23 12 20 24.14 -34 06.0 4.445 4.552 11.2 / 7 14.3 138 .17
24 12 20 24.25 -33 54.9 4.467 4.558 11.1 / 8 14.3 125 .10
25 12 20 24.37 -33 43.9 4.488 4.563 11.1 / 9 14.4 111 .04
26 12 20 24.51 -33 32.9 4.510 4.569 11.1 / 10 14.4 98 .01
27 12 20 24.67 -33 22.0 4.531 4.575 11.1 / 11 14.4 85 .00
28 12 20 24.84 -33 11.1 4.553 4.580 11.1 / 12 14.4 73 .02
29 12 20 25.02 -33 00.3 4.574 4.586 11.1 / 13 14.4 60 .05
30 12 20 25.23 -32 49.6 4.596 4.592 11.0 / 14 14.4 48 .10
31 12 20 25.44 -32 38.9 4.618 4.597 11.0 / 15 14.4 37 .17
Nov. 1 12 20 25.67 -32 28.2 4.639 4.603 11.0 / 16 14.5 26 .25
NAKANO
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(C) Copyright 2000 OAA/ComputingSection
write mail from CFAD0::NAKANO on 2000-09-26 01:56:57(JST).
C/1997 BA6 (Spacewatch)
Epoch 1999 Dec. 8.0 TT = JDT 2451520.5
T 1999 Nov. 27.58214 TT Nakano
q 3.4363710 (2000.0) P Q
z +0.0003254 Peri. 285.93853 +0.01057461 +0.76573895
+/-0.0000011 Node 317.66377 +0.00176472 -0.64311382
e 0.9988817 Incl. 72.71494 -0.99994253 +0.00696287
From 289 observations 1997 Jan. 11-2000 Aug. 22, mean residual 0".67.
NAKANO
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(C) Copyright 2000 OAA/ComputingSection
write mail from CFAD0::NAKANO on 2000-09-12 01:29:28(JST).
◎C/1997 BA6の軌道です
久万の中村彰正氏は，11月15日と28日にこの彗星の再観測に成功しました．
CCD 全光度は，それぞれ，15.3等，15.2等とのことです．氏以外に，再観測に
成功したという報告はありません．
この彗星は，離心率（1/a(org)を含めて）が恒星界から来るような大きな値
を示しましたが，観測がのびるに従って，次第に小さくなり，ついにはオ−ル
トの雲から来る彗星（ちょっと大きいか）となってしまいました．そう言えば，
もう１つ，離心率の大きかったC/1997 P2の方は，どうなったんだろう．結局，
追跡観測が報告されませんでしたが，まだ，21.0等でペガサス座に観測可能な
はずです．１度，望遠鏡を向けてください．
なお，12月のＭＰＣは，まだ，締め切っていません．最終観測となるような
彗星（小惑星はあまりいらない）の観測をお願いします．
C/1997 BA6 (Spacewatch)
Epoch 1999 Dec. 8.0 TT = JDT 2451520.5
T 1999 Nov. 27.58274 TT Nakano
q 3.4363721 (2000.0) P Q
z +0.0003247 Peri. 285.93853 +0.01057339 +0.76573905
+/-0.0000028 Node 317.66375 +0.00176351 -0.64311369
e 0.9988843 Incl. 72.71484 -0.99994255 +0.00696272
From 214 observations 1997 Jan. 11-1998 Nov. 28, mean residual 0".60.
(1/a)org.= +0.000009, (1/a)fut.= +0.000381, L= 7.
NAKANO
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(C) Copyright 1998 OAA/ComputingSection
write mail from CFAD0::NAKANO on 1998-12-03 04:39:37(JST).
戻ります。