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
1985-05-31 09:26:57 A 20 50 54.51 +33 00 25.2 657
1985-05-31 09:57:22 A 20 50 56.97 +33 01 05.4 657
1985-06-10 06:53:21 A 21 12 09.19 +38 13 59.6 657
1985-06-10 09:05:30 A 21 12 21.63 +38 16 59.6 657
1985-06-10 20:36:50 A 21 13 27.79 +38 32 23.8 186
1985-06-10 20:46:49 A 21 13 29.38 +38 32 45.4 186
1985-06-10 23:10:52 A 21 13 42.77 +38 35 52.9 071
1985-06-11 23:34:29 A 21 16 05.71 +39 08 49.8 056
1985-06-12 02:38:40 A 21 16 23.54 +39 12 58.0 491
1985-06-12 11:10:02 A 21 17 13.61 +39 24 29.3 691
1985-06-12 20:06:06 A 21 18 07.01 +39 36 28.9 186
1985-06-12 20:16:04 A 21 18 07.91 +39 36 42.9 186
1985-06-12 20:41:30 A 21 18 10.91 +39 37 21.9 186
1985-06-12 20:51:30 A 21 18 11.49 +39 37 32.7 186
1985-06-13 16:18:00 A 21 20 08.59 +40 03 49.8 372
1985-06-13 17:39:47 A 21 20 16.90 +40 05 41.3 330
1985-06-13 18:58:53 A 21 20 25.06 +40 07 27.1 186
1985-06-13 19:08:53 A 21 20 25.88 +40 07 40.2 186
1985-06-13 22:38:04 A 21 20 47.15 +40 12 22.4 071
1985-06-14 00:12:16 A 21 20 56.64 +40 14 30.5 071
1985-06-14 14:07:41 A 21 22 21.56 +40 33 19.3 397
1985-06-14 23:24:39 A 21 23 18.22 +40 45 54.5 071
1985-06-15 00:59:18 A 21 23 28.76 +40 48 04.1 491
1985-06-15 02:49:00 A 21 23 39.84 +40 50 32.8 491
1985-06-15 08:32:59 A 21 24 15.71 +40 58 18.8 691
1985-06-15 08:55:51 A 21 24 18.04 +40 58 50.8 691
1985-06-15 09:11:39 A 21 24 19.70 +40 59 12.4 691
1985-06-15 09:49:00 A 21 24 23.42 +41 00 02.2 675
1985-06-15 10:22:29 A 21 24 26.43 +41 00 47.2 675
1985-06-15 16:56:20 A 21 25 07.97 +41 09 39.1 392
1985-06-15 20:54:11 A 21 25 32.99 +41 15 02.6 186
1985-06-15 21:04:10 A 21 25 34.00 +41 15 16.5 186
1985-06-15 21:38:04 A 21 25 37.57 +41 16 02.4 186
1985-06-15 21:53:02 A 21 25 39.16 +41 16 17.5 186
1985-06-15 23:21:12 A 21 25 48.26 +41 18 21.9 071
1985-06-15 23:59:09 A 21 25 52.35 +41 19 11.7 046
1985-06-16 00:09:30 A 21 25 53.52 +41 19 27.6 046
1985-06-16 08:33:32 A 21 26 46.42 +41 30 50.7 675
1985-06-16 10:51:15 A 21 27 00.66 +41 33 55.2 675
1985-06-16 15:02:00 A 21 27 27.57 +41 39 37.7 392
1985-06-16 16:36:59 A 21 27 37.66 +41 41 44.2 392
1985-06-16 23:32:59 A 21 28 22.17 +41 51 07.7 494
1985-06-17 00:00:00 A 21 28 25.10 +41 51 44.6 494
1985-06-17 18:06:44 A 21 30 22.08 +42 16 23.9 330
1985-06-17 21:35:50 A 21 30 44.94 +42 21 02.6 114
1985-06-18 07:41:12 A 21 31 50.94 +42 34 41.4 657
1985-06-18 17:56:43 A 21 32 58.56 +42 48 41.1 330
1985-06-18 18:06:44 A 21 32 59.73 +42 48 54.5 330
1985-06-18 19:04:43 A 21 33 06.03 +42 50 15.0 330
1985-06-18 23:57:15 A 21 33 38.76 +42 56 46.4 046