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
2010-08-13 20:42:53 C 18 59 32.88 -06 23 17.0 u 160
2010-08-13 20:46:16 C 18 59 33.17 -06 23 21.1 u 160
2010-08-13 20:48:59 C 18 59 33.40 -06 23 24.0 u 160
2010-08-20 02:06:55 C 19 13 24.30 -09 09 30.5 u I15
2010-08-20 02:14:56 C 19 13 25.05 -09 09 39.2 u I15
2010-08-20 02:24:34 C 19 13 25.91 -09 09 49.4 u I15
2010-08-29 11:17:26 C 19 36 22.11 -12 51 41.9 o 300
2010-08-29 11:22:00 C 19 36 22.57 -12 51 45.9 o 300
2010-08-29 11:28:53 C 19 36 23.30 -12 51 52.2 o 300
2010-08-31 04:35:38 C 19 40 46.03 -13 27 29.6 17.8 c 704
2010-08-31 04:52:26 C 19 40 47.69 -13 27 44.6 18.2 c 704
2010-08-31 05:09:12 C 19 40 49.42 -13 27 57.0 18.3 c 704
2010-08-31 05:26:03 C 19 40 51.11 -13 28 12.8 17.9 c 704
2010-09-01 00:19:17 C 19 42 53.80 -13 44 03.5 u I15
2010-09-01 00:29:53 C 19 42 54.81 -13 44 11.7 u I15
2010-09-01 00:40:30 C 19 42 55.91 -13 44 20.8 u I15
2010-09-01 04:27:03 C 19 43 19.88 -13 47 25.4 17.3 c 704
2010-09-01 04:43:51 C 19 43 21.59 -13 47 39.8 18.0 c 704
2010-09-01 05:00:39 C 19 43 23.32 -13 47 53.2 17.6 c 704
2010-09-01 05:17:23 C 19 43 25.04 -13 48 06.8 17.5 c 704
2010-09-01 05:34:08 C 19 43 26.78 -13 48 20.1 18.7 c 704
2010-09-02 04:29:28 C 19 45 55.77 -14 06 53.5 17.3 c 704
2010-09-02 04:46:19 C 19 45 57.48 -14 07 07.2 17.6 c 704
2010-09-02 05:03:12 C 19 45 59.23 -14 07 20.3 17.6 c 704
2010-09-02 05:20:00 C 19 46 00.96 -14 07 33.7 17.5 c 704
2010-09-02 05:36:51 C 19 46 02.71 -14 07 46.9 17.6 c 704
2010-09-03 02:53:17 C 19 48 22.19 -14 24 27.8 17.0 c 704
2010-09-03 03:10:22 C 19 48 23.95 -14 24 41.1 17.1 c 704
2010-09-03 03:27:21 C 19 48 25.71 -14 24 54.6 17.3 c 704
2010-09-03 03:44:41 C 19 48 27.50 -14 25 08.1 17.2 c 704
2010-09-03 04:01:37 C 19 48 29.26 -14 25 21.2 17.3 c 704
2010-09-04 02:54:32 C 19 50 59.35 -14 42 45.1 17.1 c 704
2010-09-04 03:13:08 C 19 51 01.28 -14 42 58.9 17.2 c 704
2010-09-04 03:31:42 C 19 51 03.22 -14 43 13.0 17.3 c 704
2010-09-04 03:50:15 C 19 51 05.14 -14 43 27.1 16.9 c 704
2010-09-04 04:08:47 C 19 51 07.07 -14 43 40.5 17.6 c 704
2010-09-05 02:43:51 C 19 53 35.90 -15 00 15.2 17.2 c 704
2010-09-05 03:00:50 C 19 53 37.67 -15 00 27.8 17.2 c 704
2010-09-05 03:17:47 C 19 53 39.45 -15 00 39.9 17.0 c 704
2010-09-05 03:29:31 C 19 53 40.66 -15 00 48.5 u 448
2010-09-05 03:32:41 C 19 53 41.00 -15 00 51.0 u 448
2010-09-05 03:34:43 C 19 53 41.23 -15 00 52.5 17.6 c 704
2010-09-05 03:38:07 C 19 53 41.57 -15 00 54.8 u 448
2010-09-05 03:41:06 C 19 53 41.87 -15 00 57.0 u 448
2010-09-05 03:51:39 C 19 53 43.00 -15 01 04.6 17.3 c 704
2010-09-30 02:18:06 C 20 59 58.71 -19 00 36.5 u 448
2010-09-30 02:22:44 C 20 59 59.18 -19 00 36.7 u 448
2010-09-30 03:51:55 C 21 00 08.51 -19 00 46.1 18.4 c 704
2010-09-30 04:11:13 C 21 00 10.50 -19 00 48.5 18.8 c 704
2010-09-30 04:30:30 C 21 00 12.56 -19 00 49.8 18.8 c 704