Nakano Note (Nakano wa Kangaeru noda) NK 2491 C/2011 KP36 (Spacewatch)

The following improved orbital elements, by S. Nakano, are from 135 observations 2011 May 21 to 2013 May 5. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.40 arc second. See the previous orbits in NK 2277 and HICQ 2013. Epoch = 2016 May 12.0 TT T = 2016 May 26.92011 +/- 0.01339 (m.e.) TT Peri. = 180.59721 +/- 0.00098 Node = 173.40101 +/- 0.00035 (2000.0) Inc. = 18.98684 +/- 0.00003 q = 4.8833846 +/- 0.0000679 AU e = 0.8728455 +/- 0.0000152 1/a = +0.0260382 +/- 0.0000031 1/AU a = 38.41 AU P = 238.0 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2011/ 110612 291 0.1+ 0.4+ 120516 H06 0.2- 0.4- 110521 691 0.3- 0.3+ 110612 291 0.3- 0.2+ 120516 H06 0.0 0.3- 110521 691 0.5- 0.2+ 110612 291 0.1- 0.2+ 120517 695 0.0 0.3- 110521 691 0.5- 0.1+ 110613 G96 0.0 0.0 120517 695 0.0 0.2- 110525 691 0.1- 0.6+ 110613 G96 0.5+ 0.0 120517 695 0.0 0.2- 110525 691 0.3- 0.2+ 110613 G96 0.1- 0.1+ 120525 215 0.5- 0.0 110525 691 0.0 0.0 110613 G96 0.2- 0.6- 120525 215 0.4- 0.0 110605 G96 0.2+ 0.2+ 110623 291 0.3+ 0.3- 120525 215 0.3- 0.1- 110605 G96 0.3- 0.2+ 110623 291 0.0 0.3- 120601 G96 0.1- 0.2- 110605 G96 0.3- 0.2+ 110623 291 0.3+ 0.4- 120601 G96 0.1- 0.4- 110605 G96 0.2+ 0.2+ 110624 291 0.2+ 0.3+ 120601 G96 0.4- 0.3- 110609 691 0.2- 0.4- 110624 291 0.0 0.4+ 120601 G96 0.9- 0.2- 110609 691 0.4- 0.0 110624 291 0.1+ 0.2+ 120610 J24 0.8- 1.2+ 110609 691 0.3- 0.3- 110626 291 0.4+ 0.0 120610 J24 0.1+ 0.6+ 110609 J95 0.1+ 0.2+ 110626 291 0.4+ 0.1+ 120610 J24 0.3- 0.4+ 110609 J95 0.2- 0.6- 110626 291 0.6+ 0.0 120610 D90 0.2- 0.5+ 110610 291 0.1+ 0.5- 110701 691 0.6- 0.2- 120610 D90 0.7- 0.6+ 110610 291 0.0 0.4+ 110701 691 0.4- 0.2+ 120614 B74 0.1+ 0.5+ 110610 291 0.0 0.4- 110701 691 0.3- 0.3+ 120615 B74 0.2- 0.1- 110610 H06 0.6+ 0.2- 110904 474 0.0 0.0 120615 B74 0.2- 0.4- 110610 H06 0.3+ 0.3+ 110904 474 0.1- 0.4+ 120615 A71 0.3- 0.0 110610 291 0.1+ 0.1+ 110904 474 0.0 0.3+ 120615 A71 0.3- 0.1- 110610 291 0.1+ 0.1- 110904 474 0.1+ 0.0 120615 A71 0.3+ 0.7- 110610 291 0.0 0.2+ 2012/ 120615 A71 0.3+ 0.5- 110611 807 0.2+ 0.0 120226 H06 1.7+ 0.7+ 120615 A71 0.2- 0.4+ 110611 807 0.2+ 0.0 120226 H06 1.1+ 0.5+ 120615 A71 0.1- 0.4- 110611 807 0.4+ 0.2+ 120226 H06 1.2+ 0.6+ 120622 D90 0.2- 0.3- 110611 H01 0.3+ 0.0 120317 H06 1.1+ 0.8+ 120622 D90 0.2+ 0.1- 110611 H01 0.2+ 0.1+ 120317 H06 1.1+ 0.9+ 120622 D90 0.3+ 0.6- 110611 H01 0.2+ 0.0 120419 H21 0.2- 0.0 120622 B74 0.4- 0.4+ 110611 H01 0.2+ 0.0 120419 H21 0.1- 0.1+ 120622 B74 0.1- 0.1+ 110611 291 0.2+ 0.6- 120419 H21 0.1- 0.0 120622 B74 0.2- 0.0 110611 291 0.3+ 0.2- 120420 F65 0.1+ 0.0 120724 C32 0.5- 0.7- 110611 291 0.0 0.2- 120420 F65 0.1- 0.3- 120724 C32 0.2+ 0.5- 110611 291 0.0 0.2- 120420 F65 0.1+ 0.2- 120802 D90 0.5+ 0.1+ 110611 291 0.3+ 0.1+ 120420 F65 0.0 0.4- 120802 D90 0.3- 0.2- 110611 291 0.0 0.5- 120421 204 0.2- 0.1- 120802 D90 0.2- 0.5+ 110611 291 0.1+ 0.2- 120421 204 0.3- 0.0 120826 J38 0.7+ 0.3+ 110611 291 0.1+ 0.2- 120424 G96 0.2- 0.3+ 120826 J38 0.7+ 0.4+ 110611 291 0.1+ 0.1+ 120424 G96 0.6- 0.2+ 120826 J38 0.9+ 1.6+ 110612 291 0.9- 1.0+ 120424 G96 0.4- 0.4+ 2013/ 110612 291 0.3- 0.6- 120424 G96 0.2- 0.3+ 130408 H06 0.1+ 0.2- 110612 291 1.0- 0.1- 120425 H06 0.0 0.5+ 130408 H06 0.0 0.3- 110612 291 0.1- 0.1+ 120425 H06 0.2+ 0.3+ 130408 H06 0.2- 0.2- 110612 291 0.2+ 0.2+ 120425 H06 0.0 0.2+ 130505 130 0.1+ 1.8+ 110612 291 0.2- 0.1+ 120516 H06 0.0 0.5- 130505 130 0.4+ 0.1- ( ) -------- Rejected Obs.

Associate of Central Bureau for Astronomical Telegram Syuichi Nakano 2013 May 27

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