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
2010-06-17 08:44:57 C 18 02 06.32 +07 31 10.2 u 448
2010-06-17 08:49:17 C 18 02 06.35 +07 31 11.4 u 448
2010-06-17 08:53:43 C 18 02 06.38 +07 31 12.7 u 448
2010-06-17 08:58:05 C 18 02 06.42 +07 31 14.0 u 448
2010-06-17 09:02:30 C 18 02 06.46 +07 31 15.3 u 448
2010-06-29 20:57:25 C 18 06 25.92 +07 59 48.2 u A81
2010-06-29 21:17:40 C 18 06 26.15 +07 59 45.8 u A81
2010-06-29 21:40:01 C 18 06 26.40 +07 59 43.8 u A81
2010-07-02 21:13:09 C 18 07 44.59 +07 47 43.6 u A81
2010-07-02 21:41:34 C 18 07 44.97 +07 47 37.3 u A81
2010-07-03 00:50:18 C 18 07 47.56 +07 46 54.4 u A81
2010-07-03 01:16:41 C 18 07 47.94 +07 46 48.4 u A81
2010-07-03 22:13:16 C 18 08 13.98 +07 41 42.4 u A81
2010-07-03 23:24:19 C 18 08 15.00 +07 41 23.9 u A81
2010-07-04 01:13:58 C 18 08 16.65 +07 40 54.4 u A81
2010-07-04 03:57:38 C 18 08 21.03 +07 40 11.7 u 932
2010-07-04 04:07:39 C 18 08 21.15 +07 40 08.9 u 932
2010-07-04 04:13:39 C 18 08 21.23 +07 40 07.4 u 932
2010-07-04 04:20:47 C 18 08 21.35 +07 40 05.5 u 932
2010-07-04 22:31:22 C 18 08 44.28 +07 34 53.1 c 127
2010-07-04 22:41:07 C 18 08 44.44 +07 34 50.2 c 127
2010-07-04 22:52:26 C 18 08 44.62 +07 34 46.8 c 127
2010-07-06 20:58:39 C 18 09 47.07 +07 19 27.4 w A06
2010-07-06 21:11:17 C 18 09 47.30 +07 19 22.0 w A06
2010-07-06 21:23:40 C 18 09 47.52 +07 19 18.0 w A06
2010-07-07 21:49:06 C 18 10 22.21 +07 09 45.9 r A17
2010-07-07 22:00:23 C 18 10 22.42 +07 09 41.2 r A17
2010-07-07 22:11:41 C 18 10 22.64 +07 09 36.7 r A17
2010-07-07 22:27:52 C 18 10 22.92 +07 09 32.2 u 160
2010-07-07 22:29:58 C 18 10 22.95 +07 09 31.4 u 160
2010-07-07 22:32:18 C 18 10 23.00 +07 09 30.4 u 160
2010-07-08 22:11:19 C 18 10 58.88 +06 59 22.5 c 127
2010-07-08 22:39:29 C 18 10 59.46 +06 59 10.2 c 127
2010-07-08 22:49:43 C 18 10 59.66 +06 59 05.4 c 127
2010-07-09 22:07:02 C 18 11 36.75 +06 48 19.4 u 160
2010-07-09 22:08:46 C 18 11 36.79 +06 48 18.6 u 160
2010-07-09 22:10:45 C 18 11 36.84 +06 48 17.7 u 160
2010-07-10 05:05:30 C 18 11 48.82 +06 44 57.8 o G56
2010-07-10 05:21:12 C 18 11 49.18 +06 44 50.0 o G56
2010-07-10 05:37:26 C 18 11 49.49 +06 44 42.1 o G56
2010-07-11 00:36:44 C 18 12 20.40 +06 35 03.1 r J53
2010-07-11 00:39:21 C 18 12 20.46 +06 35 01.8 r J53
2010-07-11 00:42:03 C 18 12 20.52 +06 35 00.3 r J53
2010-07-13 21:54:37 C 18 14 28.61 +05 55 13.2 o 196
2010-07-13 22:12:23 C 18 14 29.11 +05 55 02.0 o 196
2010-07-13 23:01:18 C 18 14 30.45 +05 54 31.4 o 196
2010-07-14 22:06:12 C 18 15 17.40 +05 39 42.4 u 160
2010-07-14 22:08:08 C 18 15 17.45 +05 39 41.0 u 160
2010-07-14 22:10:50 C 18 15 17.54 +05 39 39.8 u 160
2010-07-15 21:40:02 C 18 16 07.58 +05 23 43.8 c 127