21P

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2026-03-24 (JD 2461123.5)
Eccentricity (e)0.7111070000
Semi-major axis (a)3.4907387856 AU
Inclination (i)32.05900000°
Long. of Asc. Node (Ω)195.29460000°
Arg. of Perihelion (ω)172.93950000°
Mean Anomaly (M)0.00000000°
Mean Motion (n)—°/day
Perihelion dist (q)1.00845000 AU
Aphelion dist (Q)5.97302757 AU
Orbital Period6.52192841 yr
Physical Parameters
H (abs. magnitude)9.00
G (slope)6.00
Orbit Solution
SourceMPC
Solution Date
RMS Residual—″
Uncertainty
Orbit TypeP
MOID0.010867 AU
Observations Used
Oppositions
Arc Total
First Observation Used
Last Observation Used
Observations (7431)
Date Type RA Dec Mag Band Observatory
1985-08-18 22:48:16 A 03 47 41.83 +52 21 23.9 084
1985-08-19 00:25:14 A 03 48 12.99 +52 17 57.4 046
1985-08-19 00:27:14 A 03 48 13.63 +52 17 52.6 046
1985-08-19 07:04:29 A 03 50 19.36 +52 03 22.7 657
1985-08-19 15:13:59 A 03 52 53.11 +51 45 24.9 397
1985-08-19 15:56:00 A 03 53 06.13 +51 43 52.7 397
1985-08-19 21:00:30 A 03 54 40.45 +51 32 22.0 102
1985-08-19 21:43:34 A 03 54 54.27 +51 30 46.9 095
1985-08-19 21:55:48 A 03 54 58.18 +51 30 19.4 095
1985-08-19 22:10:08 A 03 55 03.26 +51 29 47.3 057
1985-08-19 22:27:59 A 03 55 07.79 +51 29 00.9 494
1985-08-19 22:39:00 A 03 55 11.27 +51 28 36.6 494
1985-08-19 23:12:59 A 03 55 21.82 +51 27 19.6 502
1985-08-20 00:05:17 A 03 55 37.87 +51 25 27.1 555
1985-08-20 00:23:52 A 03 55 43.73 +51 24 47.6 555
1985-08-20 01:04:13 A 03 55 55.46 +51 23 07.5 086
1985-08-20 02:16:41 A 03 56 18.65 +51 20 31.5 491
1985-08-20 04:23:32 A 03 56 57.16 +51 15 44.2 491
1985-08-20 09:42:14 A 03 58 35.82 +51 03 25.7 662
1985-08-20 09:52:15 A 03 58 38.97 +51 03 02.5 662
1985-08-20 22:03:30 A 04 02 20.91 +50 34 18.1 017
1985-08-20 22:05:31 A 04 02 21.57 +50 34 20.4 186
1985-08-20 22:10:30 A 04 02 22.95 +50 34 08.1 186
1985-08-20 22:15:30 A 04 02 24.47 +50 33 56.0 186
1985-08-20 22:16:30 A 04 02 24.82 +50 33 45.2 017
1985-08-20 22:20:29 A 04 02 25.85 +50 33 44.5 186
1985-08-20 23:20:39 A 04 02 44.50 +50 31 18.2 071
1985-08-20 23:52:22 A 04 02 53.36 +50 30 05.7 022
1985-08-21 00:46:10 A 04 03 10.41 +50 27 50.6 491
1985-08-21 01:14:30 A 04 03 18.28 +50 26 49.0 046
1985-08-21 01:15:55 A 04 03 18.68 +50 26 45.3 046
1985-08-21 01:23:00 A 04 03 20.94 +50 26 30.7 562
1985-08-21 01:39:30 A 04 03 25.85 +50 25 52.0 562
1985-08-21 02:40:59 A 04 03 44.20 +50 23 26.0 022
1985-08-21 02:49:30 A 04 03 46.48 +50 23 07.0 022
1985-08-21 02:50:49 A 04 03 47.26 +50 23 01.7 491
1985-08-21 07:28:30 A 04 05 10.67 +50 11 44.2 657
1985-08-21 09:29:30 A 04 05 46.77 +50 06 57.2 662
1985-08-21 20:50:28 A 04 09 08.18 +49 39 06.6 190
1985-08-21 22:57:32 A 04 09 45.82 +49 33 48.1 071
1985-08-21 23:18:29 A 04 09 51.52 +49 32 52.7 017
1985-08-21 23:30:29 A 04 09 55.07 +49 32 24.3 017
1985-08-21 23:36:29 A 04 09 56.90 +49 32 06.5 006
1985-08-22 00:13:00 A 04 10 07.56 +49 30 40.3 006
1985-08-22 00:20:59 A 04 10 10.02 +49 30 22.9 006
1985-08-22 01:05:55 A 04 10 22.82 +49 28 30.9 046
1985-08-22 01:06:55 A 04 10 23.24 +49 28 28.4 046
1985-08-22 01:19:30 A 04 10 26.87 +49 27 58.9 562
1985-08-22 01:37:30 A 04 10 32.04 +49 27 14.5 562
1985-08-22 01:39:59 A 04 10 32.59 +49 27 07.7 556