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
2016-04-02 04:46:29 C 11 47 42.66 +06 58 13.1 q G96
2016-04-02 04:53:12 C 11 47 42.35 +06 58 15.7 q G96
2016-04-02 04:59:56 C 11 47 42.03 +06 58 18.8 q G96
2016-04-02 05:06:40 C 11 47 41.72 +06 58 22.0 q G96
2016-04-05 09:12:32 C 11 44 19.441 +07 31 56.12 L F51
2016-04-05 09:29:29 C 11 44 18.670 +07 32 03.38 L F51
2016-04-05 09:49:45 C 11 44 17.746 +07 32 12.02 L F51
2016-04-29 13:19:55 C 11 26 09.37 +10 31 20.6 q D29
2016-04-29 14:05:43 C 11 26 08.52 +10 31 28.5 q D29
2016-05-23 07:07:09 C 11 26 54.478 +10 52 09.16 L F51
2016-05-23 07:23:51 C 11 26 54.764 +10 52 07.54 L F51
2016-05-23 07:40:35 C 11 26 55.027 +10 52 06.17 L F51
2016-06-08 04:18:59 C 11 37 35.02 +09 50 50.2 q G96
2016-06-08 04:27:00 C 11 37 35.32 +09 50 48.5 q G96
2016-06-08 04:35:00 C 11 37 35.66 +09 50 46.2 q G96
2016-06-08 04:43:08 C 11 37 35.91 +09 50 44.4 q G96
2019-02-12 07:13:26 C 11 17 12.12 +03 53 43.3 V G96
2019-02-12 07:21:35 C 11 17 11.86 +03 53 46.0 V G96
2019-02-12 07:29:45 C 11 17 11.58 +03 53 48.6 V G96
2019-02-12 07:37:52 C 11 17 11.35 +03 53 50.4 V G96
2019-02-28 07:51:17 C 11 02 33.47 +06 11 44.1 V G96
2019-02-28 07:53:17 C 11 02 33.39 +06 11 44.7 V G96
2019-02-28 07:59:19 C 11 02 33.14 +06 11 47.3 V G96
2019-02-28 08:01:20 C 11 02 32.99 +06 11 47.8 V G96
2019-02-28 08:07:21 C 11 02 32.79 +06 11 50.4 V G96
2019-02-28 08:09:22 C 11 02 32.66 +06 11 51.1 V G96
2019-02-28 08:15:24 C 11 02 32.38 +06 11 53.2 V G96
2019-02-28 08:17:25 C 11 02 32.30 +06 11 54.1 V G96
2019-03-06 16:05:51 C 10 55 45.99 +07 13 31.7 q D29
2019-03-06 16:26:13 C 10 55 45.09 +07 13 39.7 q D29
2019-03-06 16:46:35 C 10 55 44.10 +07 13 48.0 q D29
2019-03-29 05:32:18 C 10 32 49.42 +10 40 54.8 o 691
2019-03-29 05:42:03 C 10 32 49.07 +10 40 58.6 o 691
2019-03-29 05:51:50 C 10 32 48.70 +10 41 01.7 o 691
2019-04-04 05:11:13 C 10 28 11.65 +11 24 31.8 V G96
2019-04-04 05:19:27 C 10 28 11.37 +11 24 34.6 V G96
2019-04-04 05:27:41 C 10 28 11.16 +11 24 37.1 V G96
2019-04-04 05:35:54 C 10 28 10.86 +11 24 39.1 V G96
2019-04-07 05:58:24 C 10 26 12.856 +11 44 00.72 U F51
2019-04-07 06:13:18 C 10 26 12.455 +11 44 04.56 U F51
2019-04-07 06:28:12 C 10 26 12.055 +11 44 08.42 U F51
2019-04-07 06:43:11 C 10 26 11.654 +11 44 12.27 U F51
2022-01-26 12:22:23 C 10 30 45.099 +05 54 09.73 U F52
2022-01-26 12:41:00 C 10 30 44.533 +05 54 13.91 U F52
2022-01-26 13:18:12 C 10 30 43.403 +05 54 22.37 U F52
2022-02-02 10:35:16 C 10 25 22.890 +06 35 38.22 U F52
2022-02-02 10:51:45 C 10 25 22.296 +06 35 42.71 U F52
2022-02-02 11:08:26 C 10 25 21.668 +06 35 47.30 U F52
2022-02-06 08:14:52 C 10 21 55.10 +07 02 17.4 V G96
2022-02-06 08:23:03 C 10 21 54.78 +07 02 18.6 V G96