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
1998-12-09 16:06:24 C 22 10 22.78 -21 17 58.8 118
1998-12-11 09:12:29 22 19 54.21 -21 45 46.8 372
1998-12-11 10:19:23 C 22 20 09.54 -21 46 28.7 897
1998-12-11 10:34:51 C 22 20 13.09 -21 46 38.4 897
1998-12-12 09:54:44 C 22 25 37.27 -22 01 12.7 360
1998-12-12 09:56:59 C 22 25 37.78 -22 01 13.9 360
1998-12-12 11:00:17 C 22 25 52.28 -22 01 51.5 351
1998-12-12 11:03:08 C 22 25 52.87 -22 01 52.6 351
1998-12-12 11:05:53 C 22 25 53.60 -22 01 55.8 351
1998-12-17 09:33:10 C 22 53 07.24 -23 02 22.5 402
1998-12-17 09:35:10 C 22 53 07.68 -23 02 23.3 402
1998-12-17 09:37:10 C 22 53 08.14 -23 02 24.2 402
1998-12-22 09:47:45 23 20 10.98 -23 41 11.6 372
1998-12-23 17:57:07 C 23 27 17.08 -23 47 51.4 118
1998-12-23 18:03:02 C 23 27 18.37 -23 47 52.6 118
1998-12-25 10:23:24 C 23 36 07.12 -23 54 03.5 351
1998-12-25 10:28:57 C 23 36 08.25 -23 54 03.9 351
1998-12-27 10:00:08 C 23 46 22.46 -23 58 24.3 351
1998-12-27 10:03:20 C 23 46 23.13 -23 58 26.1 351
1998-12-27 10:07:25 C 23 46 24.08 -23 58 25.5 351
1999-01-01 08:55:45 C 00 11 13.94 -23 56 15.7 897
1999-01-01 09:03:04 C 00 11 15.46 -23 56 14.7 897
1999-01-04 10:53:44 00 26 05.79 -23 46 16.7 372
1999-01-04 16:17:29 C 00 27 10.09 -23 45 20.2 118
1999-01-04 16:23:38 C 00 27 11.33 -23 45 19.0 118
1999-01-05 09:48:00 00 30 36.42 -23 41 59.1 372
1999-01-05 10:30:01 C 00 30 44.67 -23 41 50.0 351
1999-01-05 10:35:17 C 00 30 45.67 -23 41 49.2 351
1999-01-05 10:39:50 C 00 30 46.56 -23 41 48.6 351
1999-01-05 11:48:02 C 00 30 59.68 -23 41 25.7 422
1999-01-05 11:48:47 C 00 30 59.83 -23 41 25.4 422
1999-01-05 11:49:24 C 00 30 59.96 -23 41 25.3 422
1999-01-07 09:36:26 00 39 52.30 -23 31 15.7 372
1999-01-10 23:54:43 C 00 56 05.79 -23 06 25.1 758
1999-01-10 23:57:41 C 00 56 06.33 -23 06 23.9 758
1999-01-16 10:25:33 C 01 19 24.67 -22 17 27.5 347
1999-01-16 10:30:12 C 01 19 25.45 -22 17 26.0 347
1999-01-16 10:35:49 C 01 19 26.43 -22 17 22.3 347
1999-01-17 09:58:26 C 01 23 28.12 -22 07 21.4 351
1999-01-17 10:01:43 C 01 23 28.63 -22 07 19.9 351
1999-01-17 10:17:17 C 01 23 31.24 -22 07 13.3 897
1999-01-17 10:37:18 C 01 23 34.62 -22 07 04.5 897
1999-01-18 10:41:55 C 01 27 40.54 -21 56 23.1 897
1999-01-18 10:50:59 C 01 27 42.08 -21 56 19.1 897
1999-01-18 17:05:57 C 01 28 45.70 -21 53 29.9 613
1999-01-18 17:28:02 C 01 28 49.45 -21 53 19.6 613
1999-01-18 17:42:44 C 01 28 51.82 -21 53 12.8 613
1999-01-20 17:46:54 C 01 36 52.98 -21 30 44.8 017
1999-01-20 17:50:20 C 01 36 53.59 -21 30 43.0 017
1999-01-20 17:58:28 C 01 36 54.89 -21 30 39.5 017