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
2010-09-30 05:09:00 C 21 00 16.56 -19 00 53.9 19.1 c 704
2010-10-01 03:37:58 C 21 02 42.55 -19 03 03.3 18.3 c 704
2010-10-01 03:45:12 C 21 02 43.33 -19 03 03.6 18.6 c 704
2010-10-01 03:57:12 C 21 02 44.54 -19 03 04.7 18.9 c 704
2010-10-01 04:23:39 C 21 02 47.32 -19 03 07.1 18.8 c 704
2010-10-01 04:35:36 C 21 02 48.50 -19 03 07.9 18.7 c 704
2010-10-01 04:42:51 C 21 02 49.33 -19 03 08.2 18.7 c 704
2010-10-01 04:54:47 C 21 02 50.53 -19 03 09.4 18.6 c 704
2010-10-01 05:02:01 C 21 02 51.29 -19 03 09.9 18.8 c 704
2010-10-07 02:13:18 C 21 17 54.59 -19 07 09.6 18.6 c 704
2010-10-07 02:33:01 C 21 17 56.62 -19 07 09.2 19.2 c 704
2010-10-07 02:52:41 C 21 17 58.68 -19 07 08.5 19.1 c 704
2010-10-07 03:32:04 C 21 18 02.65 -19 07 06.9 19.1 c 704
2010-10-08 01:56:12 C 21 20 24.27 -19 06 20.9 18.1 c 704
2010-10-08 02:15:58 C 21 20 26.24 -19 06 20.0 18.5 c 704
2010-10-08 02:35:55 C 21 20 28.27 -19 06 19.4 18.5 c 704
2010-10-08 02:55:39 C 21 20 30.28 -19 06 18.3 18.4 c 704
2010-10-08 03:15:21 C 21 20 32.29 -19 06 17.8 18.5 c 704
2010-10-11 03:38:00 C 21 28 04.80 -19 01 17.5 r 703
2010-10-11 03:52:56 C 21 28 06.31 -19 01 15.4 r 703
2010-10-11 04:00:20 C 21 28 07.14 -19 01 15.2 r 703
2010-11-08 03:53:35 C 22 33 23.50 -16 02 51.6 r 703
2010-11-08 04:02:41 C 22 33 24.26 -16 02 49.1 r 703
2010-11-08 04:11:52 C 22 33 25.05 -16 02 44.7 r 703
2010-11-08 04:21:00 C 22 33 25.88 -16 02 41.1 r 703
2010-11-18 04:55:01 C 22 54 56.772 -14 20 16.26 L F51
2010-11-18 05:10:14 C 22 54 58.070 -14 20 09.66 L F51
2013-03-11 09:31:39 C 13 59 14.93 -04 36 53.3 u 807
2013-03-11 09:37:41 C 13 59 14.92 -04 36 51.1 u 807
2013-03-11 09:43:43 C 13 59 14.91 -04 36 49.0 u 807
2013-03-11 09:48:50 C 13 59 14.89 -04 36 47.2 u 807
2013-04-02 09:13:05 C 13 50 11.47 -00 35 04.1 u 703
2013-04-02 09:23:36 C 13 50 11.22 -00 34 57.8 u 703
2013-04-02 09:34:11 C 13 50 10.82 -00 34 52.5 u 703
2013-04-09 12:37:19 C 13 43 59.748 +01 02 57.45 L F51
2013-04-09 12:54:25 C 13 43 59.027 +01 03 07.41 L F51
2013-04-11 07:26:42 C 13 42 15.69 +01 27 58.4 u 703
2013-04-11 07:34:01 C 13 42 15.40 +01 28 03.0 u 703
2013-04-11 07:41:22 C 13 42 15.08 +01 28 07.7 u 703
2013-04-11 07:48:45 C 13 42 14.76 +01 28 11.5 u 703
2013-04-13 04:04:35 C 13 40 23.68 +01 54 06.2 c 926
2013-04-13 04:28:11 C 13 40 22.63 +01 54 19.0 c 926
2013-04-13 04:57:50 C 13 40 21.30 +01 54 36.9 c 926
2013-04-14 17:32:40 C 13 38 45.82 +02 15 57.6 r D29
2013-04-14 17:56:58 C 13 38 44.73 +02 16 11.3 r D29
2013-04-14 18:21:16 C 13 38 43.63 +02 16 25.9 r D29
2013-04-14 22:12:17 C 13 38 33.91 +02 18 39.2 c A24
2013-04-14 22:14:25 C 13 38 33.96 +02 18 38.7 c A24
2013-04-14 22:40:44 C 13 38 32.62 +02 18 56.8 c A24
2013-04-14 23:36:02 C 13 38 30.17 +02 19 28.3 c A24