161998 (1988 PA)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4062657190 ± 2.17e-08
Semi-major axis (a)2.1466330354 AU ± 4.14e-09
Inclination (i)8.22733029° ± 2.41e-06
Long. of Asc. Node (Ω)162.05534372° ± 1.55e-05
Arg. of Perihelion (ω)137.63522651° ± 1.62e-05
Mean Anomaly (M)312.21358507° ± 6.34e-06
Mean Motion (n)0.3133830935°/day ± 9.06e-10
Perihelion dist (q)1.27452962 AU ± 4.67e-08
Aphelion dist (Q)3.01873645 AU ± 4.70e-08
Orbital Period3.14511633 yr ± 9.09e-09
Physical Parameters
H (abs. magnitude)17.59
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.316″
Uncertainty0
Orbit TypeAmor
MOID0.276951 AU
Observations Used483
Oppositions25
Arc Total1988-2025
First Observation Used1988-05-22
Last Observation Used2025-03-03
Observations (503)
Date Type RA Dec Mag Band Observatory
2010-07-15 21:45:13 C 18 16 07.73 +05 23 40.2 c 127
2010-07-15 21:51:02 C 18 16 07.91 +05 23 36.3 c 127
2010-07-15 21:56:37 C 18 16 08.09 +05 23 32.3 c 127
2010-07-17 21:05:51 C 18 17 55.37 +04 49 22.2 u A81
2010-07-17 22:06:36 C 18 17 57.39 +04 48 36.2 u A81
2010-07-17 23:07:22 C 18 17 59.42 +04 47 50.1 u A81
2010-07-18 21:01:55 C 18 18 53.50 +04 30 49.7 r A17
2010-07-18 21:12:33 C 18 18 53.89 +04 30 41.2 r A17
2010-07-18 21:23:43 C 18 18 54.29 +04 30 32.4 r A17
2010-07-18 21:27:23 C 18 18 54.46 +04 30 29.3 o 196
2010-07-18 21:42:32 C 18 18 55.00 +04 30 17.4 o 196
2010-07-18 21:47:21 C 18 18 55.15 +04 30 14.9 v 204
2010-07-18 22:23:56 C 18 18 56.49 +04 29 44.9 o 196
2010-07-18 22:36:21 C 18 18 56.90 +04 29 36.2 v 204
2010-07-18 22:38:34 C 18 18 56.98 +04 29 34.5 v 204
2010-07-23 04:56:47 C 18 23 36.14 +03 02 22.9 o G56
2010-07-23 05:19:12 C 18 23 37.04 +03 02 02.8 o G56
2010-07-23 05:35:14 C 18 23 37.77 +03 01 47.6 o G56
2010-07-23 06:01:35 C 18 23 38.89 +03 01 23.9 o G56
2010-07-25 21:40:39 C 18 26 56.80 +02 01 08.0 u C27
2010-07-25 21:49:39 C 18 26 57.26 +02 00 59.4 u C27
2010-07-25 21:59:49 C 18 26 57.70 +02 00 49.6 u C27
2010-07-25 22:11:10 C 18 26 58.30 +02 00 38.6 u C27
2010-07-25 22:20:14 C 18 26 58.71 +02 00 29.6 u C27
2010-07-25 22:51:21 C 18 27 00.22 +01 59 59.7 u C27
2010-07-25 22:57:32 C 18 27 00.51 +01 59 52.2 u C27
2010-07-27 21:25:22 C 18 29 37.51 +01 13 22.2 u 160
2010-07-27 21:27:35 C 18 29 37.62 +01 13 19.6 u 160
2010-07-27 21:29:57 C 18 29 37.75 +01 13 17.4 u 160
2010-07-29 05:17:45 C 18 31 31.21 +00 40 26.7 o G56
2010-07-29 05:34:48 C 18 31 32.12 +00 40 08.7 o G56
2010-07-29 05:52:19 C 18 31 33.11 +00 39 49.9 o G56
2010-07-31 21:54:44 C 18 35 34.90 -00 28 44.8 u 160
2010-07-31 21:56:59 C 18 35 35.04 -00 28 47.2 u 160
2010-07-31 21:59:12 C 18 35 35.16 -00 28 49.4 u 160
2010-07-31 22:05:05 C 18 35 35.54 -00 28 56.8 u A53
2010-07-31 22:22:58 C 18 35 36.62 -00 29 16.1 u A53
2010-07-31 22:44:00 C 18 35 37.88 -00 29 39.1 u A53
2010-08-02 03:04:08 C 18 37 32.02 -01 00 46.5 r H53
2010-08-02 03:07:17 C 18 37 32.20 -01 00 50.2 r H53
2010-08-02 03:10:24 C 18 37 32.40 -01 00 53.9 r H53
2010-08-02 03:13:33 C 18 37 32.59 -01 00 57.1 r H53
2010-08-02 03:16:41 C 18 37 32.78 -01 01 00.7 r H53
2010-08-02 03:19:41 C 18 37 33.00 -01 01 04.3 r H53
2010-08-09 03:50:37 C 18 50 01.96 -04 13 05.0 r H53
2010-08-09 03:54:45 C 18 50 02.19 -04 13 09.7 r H53
2010-08-09 03:58:45 C 18 50 02.48 -04 13 14.1 r H53
2010-08-09 04:02:46 C 18 50 02.75 -04 13 19.1 r H53
2010-08-09 04:06:48 C 18 50 03.07 -04 13 23.8 r H53
2010-08-09 04:10:48 C 18 50 03.36 -04 13 28.5 r H53