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
2007-09-18 07:23:02 C 02 29 00.48 +04 55 47.5 18.8 c 704
2007-09-18 07:39:41 C 02 29 00.18 +04 55 37.9 19.1 c 704
2007-09-18 07:56:21 C 02 28 59.85 +04 55 28.6 18.8 c 704
2007-09-18 08:09:39 C 02 28 59.74 +04 55 23.0 a 699
2007-09-18 08:12:59 C 02 28 59.56 +04 55 19.4 19.0 c 704
2007-09-18 08:41:14 C 02 28 59.11 +04 55 03.4 a 699
2007-09-18 09:02:50 C 02 28 58.69 +04 54 51.4 r 683
2007-09-18 09:12:50 C 02 28 58.46 +04 54 45.2 a 699
2007-09-18 09:22:09 C 02 28 58.32 +04 54 40.4 r 683
2007-09-18 09:41:24 C 02 28 57.86 +04 54 30.1 r 683
2007-09-18 09:44:26 C 02 28 57.89 +04 54 28.2 a 699
2007-09-19 08:58:30 C 02 28 33.87 +04 41 18.2 r 683
2007-09-19 09:17:47 C 02 28 33.39 +04 41 07.0 r 683
2007-09-19 09:37:04 C 02 28 33.05 +04 40 53.7 r 683
2007-09-21 08:10:26 C 02 27 36.70 +04 14 16.7 18.5 c 704
2007-09-21 08:27:44 C 02 27 36.26 +04 14 06.9 18.5 c 704
2007-09-21 08:45:03 C 02 27 35.82 +04 13 56.8 18.4 c 704
2007-09-21 09:02:19 C 02 27 35.42 +04 13 46.4 19.5 c 704
2007-09-21 09:19:36 C 02 27 34.94 +04 13 36.6 18.9 c 704
2007-10-08 07:45:24 C 02 13 15.43 +00 21 09.8 w 699
2007-10-08 08:16:58 C 02 13 13.92 +00 20 53.0 w 699
2007-10-08 08:48:35 C 02 13 12.37 +00 20 36.5 w 699
2007-10-08 09:20:11 C 02 13 10.88 +00 20 19.3 w 699
2007-10-16 22:54:31 C 02 03 31.82 -01 20 00.4 o 987
2007-10-16 23:16:20 C 02 03 30.78 -01 20 09.9 o 987
2007-10-17 05:57:01 C 02 03 11.92 -01 22 59.6 w 699
2007-10-17 06:33:52 C 02 03 09.98 -01 23 15.6 w 699
2007-10-17 07:10:45 C 02 03 08.16 -01 23 31.9 w 699
2007-10-17 07:47:37 C 02 03 06.29 -01 23 47.7 w 699
2007-10-18 07:30:00 C 02 01 58.71 -01 33 49.1 18.2 c 704
2007-10-18 07:46:17 C 02 01 57.87 -01 33 55.7 18.6 c 704
2007-10-18 08:02:33 C 02 01 57.07 -01 34 02.7 18.7 c 704
2007-10-18 08:18:48 C 02 01 56.25 -01 34 09.1 18.4 c 704
2007-10-18 08:35:05 C 02 01 55.45 -01 34 15.9 18.7 c 704
2007-10-19 06:36:30 C 02 00 53.32 -01 43 15.8 w 699
2007-10-19 07:13:19 C 02 00 51.50 -01 43 31.6 w 699
2007-10-19 07:22:16 C 02 00 51.04 -01 43 33.9 r 703
2007-10-19 07:35:34 C 02 00 50.40 -01 43 39.4 r 703
2007-10-19 07:48:50 C 02 00 49.71 -01 43 44.6 r 703
2007-10-19 07:50:09 C 02 00 49.67 -01 43 46.2 w 699
2007-10-19 08:02:10 C 02 00 49.06 -01 43 50.1 r 703
2007-10-19 08:26:59 C 02 00 47.86 -01 44 01.1 w 699
2007-11-02 05:41:59 C 01 46 35.25 -03 20 56.4 r 703
2007-11-02 05:51:23 C 01 46 34.89 -03 20 57.9 r 703
2007-11-02 06:00:45 C 01 46 34.53 -03 21 00.1 r 703
2007-11-02 06:10:07 C 01 46 34.10 -03 21 01.6 r 703
2007-11-11 04:14:45 C 01 40 01.30 -03 43 52.0 r 703
2007-11-11 04:24:56 C 01 40 00.98 -03 43 52.0 r 703
2007-11-11 04:35:15 C 01 40 00.73 -03 43 52.3 r 703
2007-11-11 04:45:27 C 01 40 00.51 -03 43 52.8 r 703