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
1988-05-22 09:38:00 18 50 16.02 +00 54 12.1 675
1988-05-22 10:27:59 18 50 19.04 +00 54 46.6 675
1988-08-09 07:41:00 A 20 30 49.89 -01 24 34.5 16.0 675
1988-08-09 08:10:00 A 20 30 51.08 -01 25 03.7 675
1988-08-10 06:56:14 A 20 32 04.55 -01 51 42.7 16.0 675
1988-08-10 12:42:52 A 20 32 23.68 -01 57 58.7 413
1988-08-10 14:02:53 A 20 32 27.21 -01 59 30.5 413
1988-08-11 04:38:45 A 20 33 15.66 -02 17 10.7 16.8 675
1988-08-11 05:09:29 A 20 33 17.23 -02 17 48.2 675
1988-08-12 05:12:59 A 20 34 35.58 -02 46 05.0 675
1988-08-12 05:42:30 A 20 34 36.91 -02 46 40.2 675
1988-08-13 06:25:30 20 35 57.95 -03 15 46.0 16.5 675
1988-08-13 07:10:44 20 36 00.13 -03 16 38.4 675
1988-08-16 06:15:15 A 20 39 57.63 -04 40 03.6 801
1988-08-16 06:49:14 A 20 39 59.25 -04 40 41.9 801
1988-08-26 07:30:59 A 20 54 19.18 -09 05 49.7 568
1988-09-03 06:49:43 A 21 06 30.26 -12 01 55.4 568
1988-09-07 04:57:59 A 21 12 42.51 -13 14 09.8 17.2 675
1988-09-07 05:37:14 A 21 12 45.05 -13 14 41.4 675
1988-09-09 03:32:33 A 21 15 49.35 -13 46 13.7 801
1988-09-10 05:35:07 21 17 35.26 -14 02 58.8 675
1988-09-19 05:05:45 A 21 32 28.66 -15 51 58.2 807
2004-11-14 15:52:56 C 03 46 37.35 +05 13 50.8 o 413
2004-11-14 16:07:56 C 03 46 36.52 +05 13 47.8 o 413
2004-11-15 13:13:33 C 03 45 28.895 +05 09 50.70 r 413
2004-11-15 13:23:32 C 03 45 28.338 +05 09 48.69 r 413
2004-12-14 05:20:35 C 03 16 13.052 +04 35 30.80 e 645
2004-12-14 05:25:35 C 03 16 12.920 +04 35 31.16 22.55 e 645
2007-05-22 09:41:04 C 22 32 46.55 +00 25 33.8 r 448
2007-05-22 10:10:12 C 22 32 50.64 +00 25 52.9 r 448
2007-05-22 10:39:32 C 22 32 54.62 +00 26 12.2 r 448
2007-06-19 10:27:52 C 00 02 13.23 +07 00 36.9 r 703
2007-06-19 10:33:32 C 00 02 13.84 +07 00 39.8 r 703
2007-06-19 10:39:11 C 00 02 14.64 +07 00 41.2 r 703
2007-06-19 10:44:50 C 00 02 15.25 +07 00 44.4 r 703
2007-08-09 09:14:50 C 02 04 00.61 +10 50 44.8 19.0 c 704
2007-08-09 09:31:52 C 02 04 01.70 +10 50 43.3 19.5 c 704
2007-08-09 10:06:06 C 02 04 03.87 +10 50 39.1 19.1 c 704
2007-08-09 10:23:07 C 02 04 04.97 +10 50 36.3 19.0 c 704
2007-08-15 09:36:00 C 02 12 43.31 +10 26 23.3 18.9 c 704
2007-08-15 09:53:30 C 02 12 44.22 +10 26 19.3 18.9 c 704
2007-08-15 10:11:02 C 02 12 45.12 +10 26 15.6 18.8 c 704
2007-08-15 10:28:29 C 02 12 46.01 +10 26 12.2 18.8 c 704
2007-09-15 07:31:17 C 02 29 57.08 +05 35 42.9 19.1 c 704
2007-09-15 07:47:56 C 02 29 56.87 +05 35 33.7 18.9 c 704
2007-09-15 08:04:34 C 02 29 56.68 +05 35 24.4 18.8 c 704
2007-09-15 08:21:11 C 02 29 56.46 +05 35 15.1 19.0 c 704
2007-09-16 03:14:04 C 02 29 43.94 +05 24 54.3 o 950
2007-09-16 03:15:20 C 02 29 43.93 +05 24 53.8 o 950
2007-09-18 07:06:21 C 02 29 00.79 +04 55 57.2 18.8 c 704