2021 July 25, 15:22:44 UT Orbital elements: C/2021 O1 (Nishimura) T 2021 Aug. 13.19044 TT Sato q 0.7941436 (2000.0) P Q Peri. 73.10409 -0.34222342 -0.88924201 Node 41.28859 +0.58657246 -0.45454531 e 1.0 Incl. 27.38713 +0.73404079 -0.05135366 From 50 observations 2021 July 21-24, mean residual 0".71. Residuals in seconds of arc 210718 XXF(41.2+ 12.2+)Y 210723 Q24 0.1- 0.1- 210724 349 0.1- 0.2+ 210719 XXF(21.8+ 3.6+)Y 210723 367 0.9- 0.6+ 210724 D95 0.2+ 0.2+ 210721 247 (1.7- 2.1-)Y 210723 367 1.1- 1.3+ 210724 Q23 0.6+ 0.4- 210721 247 (2.8- 0.7+)Y 210723 D78 0.6- 0.6- 210724 349 0.0 0.1- 210721 247 0.1+ 0.4- Y 210723 247 0.7- 0.4- 210724 349 0.4- 0.1+ 210722 247 0.9+ 1.4+ Y 210723 247 0.8- 0.6+ 210724 Q23 0.6+ 0.2- 210722 247 0.0 0.9+ Y 210723 247 0.7- 0.1+ 210724 Q21 0.4- 0.8- 210722 247 0.8- 0.4- Y 210723 247 0.2+ 1.1+ 210724 Q21 1.5- 1.4- 210722 247 (6.1- 2.4+)Y 210723 D78 1.2- 0.1+ 210724 Q21 0.3+ 0.5- 210722 247 (6.7+ 4.1+)Y 210723 367 0.8+ 0.5- 210724 247 0.7+ 0.8+ 210722 247 (1.4+ 3.3-)Y 210723 367 1.1+ 0.3- 210724 247 0.0 0.2- 210722 247 (4.2- 1.2+)Y 210724 A71 1.7+ 1.5- 210724 247 1.6+ 0.8- 210722 247 (0.9- 3.1+)Y 210724 A71 0.4+ 0.3- 210724 P87 0.2- 0.3- 210722 247 (3.6+ 10.2+)Y 210724 A71 1.2+ 1.0- 210724 P87 0.9- 0.7+ 210722 247 (1.1- 4.4-)Y 210724 A71 0.3+ 0.9- 210724 P87 0.6- 0.7- 210722 247 (5.8- 9.3+)Y 210724 A71 0.2+ 0.4- 210724 186 0.1- 0.1+ 210722 247 (1.6+ 2.7-)Y 210724 A71 (2.5+ 2.2-) 210724 186 0.2+ 0.5+ 210722 247 (0.3+ 2.0-)Y 210724 D95 0.0 0.2+ 210724 186 1.1+ 1.3+ 210723 Q24 0.6- 0.5+ 210724 349 0.0 0.1- 210724 186 1.6- 0.8+ 210723 Q24 0.5+ 0.5- 210724 Q23 0.4+ 0.1- 210724 186 0.3- 0.2+ 210723 Q24 1.0+ 0.5- 210724 349 0.4- 0.4+ 210724 186 0.1- 1.7+ 210723 Q24 0.2- 0.1- 210724 D95 0.2+ 0.4- 2021 July 25, 06:05:44 UT Orbit-1 Orbital elements: C/2021 O1 (Nishimura) = HN002 T 2021 Aug. 12.11491 TT Sato q 0.8035088 (2000.0) P Q Peri. 71.19630 -0.30714508 -0.90366721 Node 40.84900 +0.60624926 -0.42750144 e 1.0 Incl. 27.14439 +0.73356918 -0.02506173 From 35 observations 2021 July 23-24, mean residual 0".64. Orbit-2 Orbital elements: C/2021 O1 (Nishimura) = HN002 T 2021 Aug. 14.20368 TT Sato q 0.7841332 (2000.0) P Q Peri. 74.97910 -0.37586426 -0.87377173 Node 41.71165 +0.56606051 -0.48017653 e 1.0 Incl. 27.63455 +0.73369037 -0.07715870 From 36 observations 2021 July 18-24, mean residual 0".74. 2021 July 24, 15:46:57 UT Orbital elements: C/2021 O1? = HN002 T 2021 Aug. 12.94425 TT Sato q 0.7964523 (2000.0) P Q Peri. 72.65715 -0.33411241 -0.89272655 Node 41.18857 +0.59128232 -0.44832502 e 1.0 Incl. 27.32929 +0.73399872 -0.04521038 From 38 observations 2021 July 21-24, mean residual 0".72. 2021 July 24, 03:16:32 UT Orbital elements: C/2021 O1? = HN002 T 2021 Aug. 15.02868 TT Sato q 0.7728404 (2000.0) P Q Peri. 76.69964 -0.40514386 -0.85891451 Node 42.04060 +0.54635595 -0.50217558 e 1.0 Incl. 27.88988 +0.73304408 -0.10042687 From 23 observations 2021 July 18-24, mean residual 1".57. 2021 July 23, 22:16:14 UT Orbital elements: C/2021 O1? = HN002 T 2021 Aug. 15.11238 TT Sato q 0.7716053 (2000.0) P Q Peri. 76.88090 -0.40818246 -0.85729423 Node 42.07472 +0.54422563 -0.50444364 e 1.0 Incl. 27.91761 +0.73294307 -0.10287472 From 12 observations 2021 July 18-23, mean residual 2".02. 2021 July 23, 16:42:57 UT Orbital elements: C/2021 O1? = HN002 T 2021 Aug. 11.45947 TT Sato q 0.8140243 (2000.0) P Q Peri. 69.95160 -0.28383066 -0.91304777 Node 40.49884 +0.62069734 -0.40776863 e 1.0 Incl. 26.80735 +0.73087275 -0.00827784 From 12 observations 2021 July 18-22, mean residual 7".50. 2021 July 23, 11:02:58 UT Orbital elements: C/2021 O1? = HN002 T 2021 July 22.7784 TT Sato q 0.401342 (2000.0) P Q Peri. 57.1527 +0.9098517 -0.3301747 Node 320.4340 +0.0971691 +0.7583570 e 1.0 Incl. 23.2370 +0.4033957 +0.5620315 From 10 observations 2021 July 21-22, mean residual 8".17. --