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
2013-04-14 23:38:06 C 13 38 30.09 +02 19 29.1 c A24
2013-04-15 04:09:02 C 13 38 18.61 +02 22 08.3 o 691
2013-04-15 04:34:26 C 13 38 17.44 +02 22 23.4 o 691
2013-04-15 04:59:50 C 13 38 16.28 +02 22 37.8 o 691
2013-04-18 07:03:44 C 13 34 57.61 +03 05 18.6 V G45
2013-04-18 07:20:11 C 13 34 56.74 +03 05 27.7 V G45
2013-04-18 07:55:44 C 13 34 55.08 +03 05 48.2 V G45
2013-04-18 10:50:09 C 13 34 46.90 +03 07 27.3 V G45
2013-04-19 06:36:44 C 13 33 53.60 +03 18 40.1 u G96
2013-04-19 06:46:09 C 13 33 53.17 +03 18 45.6 u G96
2013-04-19 06:55:25 C 13 33 52.70 +03 18 50.7 u G96
2013-04-19 07:04:43 C 13 33 52.27 +03 18 56.0 u G96
2013-04-22 08:41:47 C 13 30 30.529 +03 59 48.87 L F51
2013-04-22 08:59:36 C 13 30 29.666 +03 59 58.57 L F51
2013-04-22 11:28:59 C 13 30 22.400 +04 01 19.83 L F51
2013-04-22 11:44:57 C 13 30 21.625 +04 01 28.45 L F51
2013-04-29 08:23:00 C 13 22 55.20 +05 25 30.6 u 703
2013-04-29 08:33:40 C 13 22 54.66 +05 25 34.4 u 703
2013-04-29 08:44:26 C 13 22 54.22 +05 25 39.6 u 703
2013-04-29 08:55:06 C 13 22 53.72 +05 25 45.3 u 703
2013-05-01 08:24:33 C 13 20 50.20 +05 47 36.1 u 703
2013-05-01 08:35:17 C 13 20 49.59 +05 47 40.5 u 703
2013-05-01 08:46:09 C 13 20 49.16 +05 47 45.1 u 703
2013-05-01 08:57:00 C 13 20 48.69 +05 47 49.6 u 703
2013-05-12 04:59:24 C 13 11 00.56 +07 22 41.6 u 703
2013-05-12 05:10:47 C 13 11 00.13 +07 22 44.6 u 703
2013-05-12 05:22:12 C 13 10 59.80 +07 22 48.5 u 703
2013-05-12 05:33:34 C 13 10 59.34 +07 22 51.8 u 703
2016-01-18 14:34:24 C 12 24 25.174 -02 04 13.14 L F51
2016-01-18 14:51:31 C 12 24 25.455 -02 04 13.13 L F51
2016-01-18 15:08:38 C 12 24 25.758 -02 04 13.24 L F51
2016-01-18 15:25:45 C 12 24 26.062 -02 04 13.41 L F51
2016-02-29 12:06:49 C 12 20 16.327 +00 58 20.28 L F51
2016-02-29 12:24:07 C 12 20 15.792 +00 58 26.92 L F51
2016-02-29 12:41:30 C 12 20 15.272 +00 58 33.88 L F51
2016-02-29 12:58:41 C 12 20 14.749 +00 58 40.16 L F51
2016-03-07 10:21:44 C 12 14 48.624 +02 06 29.79 L F51
2016-03-07 10:41:13 C 12 14 47.877 +02 06 38.26 L F51
2016-03-07 11:00:43 C 12 14 47.136 +02 06 46.75 L F51
2016-03-08 01:59:44 C 12 14 14.03 +02 13 20.5 c J04
2016-03-08 02:16:34 C 12 14 13.34 +02 13 27.7 c J04
2016-03-08 02:33:24 C 12 14 12.69 +02 13 35.6 c J04
2016-03-08 02:50:14 C 12 14 12.02 +02 13 42.8 c J04
2016-03-14 11:36:28 C 12 08 06.106 +03 23 43.80 L F51
2016-03-14 11:53:54 C 12 08 05.349 +03 23 52.18 L F51
2016-03-14 12:11:23 C 12 08 04.570 +03 24 00.47 L F51
2016-03-14 12:28:54 C 12 08 03.785 +03 24 08.69 L F51
2016-03-28 07:58:47 C 11 53 03.62 +06 04 01.5 q 703
2016-03-28 08:28:39 C 11 53 02.13 +06 04 14.6 q 703
2016-03-28 08:43:35 C 11 53 01.35 +06 04 21.8 q 703