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
1986-01-10 15:40:29 A 06 17 47.42 -33 36 40.9 323
1986-01-13 18:36:00 A 06 15 13.22 -32 42 04.0 323
1986-01-14 16:47:29 A 06 14 31.91 -32 25 21.2 323
1986-01-15 16:51:29 A 06 13 49.39 -32 06 52.6 323
1986-01-16 16:49:29 A 06 13 09.02 -31 48 13.2 323
1986-01-17 14:01:59 A 06 12 35.61 -31 31 30.2 323
1986-02-03 15:38:59 06 07 21.83 -25 46 40.8 323
1986-02-04 01:55:05 A 06 07 21.78 -25 37 56.5 801
1986-02-08 13:49:28 A 06 07 41.36 -24 04 57.4 474
1986-02-08 14:15:29 A 06 07 41.51 -24 04 35.6 474
1986-03-06 12:26:00 A 06 20 01.53 -15 53 15.0 323
1987-03-31 07:04:05 A 10 10 35.06 -11 18 20.2 695
1987-03-31 07:14:47 A 10 10 34.78 -11 18 14.6 695
1991-02-16 12:48:16 A 15 47 39.65 -03 57 56.0 568
1991-02-16 13:20:24 A 15 47 40.22 -03 57 49.7 568
1991-02-16 13:52:20 A 15 47 40.75 -03 57 43.4 568
1991-02-16 14:21:59 A 15 47 41.23 -03 57 36.4 568
1991-03-14 09:16:37 A 15 54 04.07 -01 15 27.5 807
1991-03-15 08:43:41 A 15 54 05.93 -01 07 54.9 807
1998-01-20 12:54:24 C 16 29 17.53 -03 56 54.1 696
1998-01-20 12:59:55 C 16 29 17.80 -03 56 54.1 696
1998-01-20 13:05:30 C 16 29 17.96 -03 56 54.0 696
1998-02-23 05:58:11 C 17 05 35.57 -01 00 26.3 954
1998-02-23 06:00:23 C 17 05 35.66 -01 00 25.6 954
1998-02-23 06:02:33 C 17 05 35.75 -01 00 25.0 954
1998-02-23 06:04:45 C 17 05 35.84 -01 00 24.3 954
1998-02-23 06:06:55 C 17 05 35.93 -01 00 23.6 954
1998-02-23 06:10:50 C 17 05 36.09 -01 00 22.4 954
1998-02-23 06:13:01 C 17 05 36.17 -01 00 21.7 954
1998-02-23 06:15:12 C 17 05 36.26 -01 00 21.1 954
1998-02-23 06:17:23 C 17 05 36.35 -01 00 20.4 954
1998-02-23 06:19:34 C 17 05 36.44 -01 00 19.7 954
1998-02-23 06:21:59 C 17 05 36.54 -01 00 19.0 954
1998-02-23 06:24:10 C 17 05 36.63 -01 00 18.3 954
1998-02-23 06:26:21 C 17 05 36.72 -01 00 17.6 954
1998-02-23 06:28:32 C 17 05 36.81 -01 00 17.0 954
1998-02-24 04:58:13 C 17 06 31.39 -00 53 01.6 954
1998-02-24 05:00:24 C 17 06 31.47 -00 53 00.9 954
1998-02-24 05:02:35 C 17 06 31.56 -00 53 00.2 954
1998-02-24 05:04:45 C 17 06 31.64 -00 52 59.5 954
1998-02-24 05:06:56 C 17 06 31.73 -00 52 58.8 954
1998-02-24 05:09:08 C 17 06 31.82 -00 52 58.1 954
1998-02-24 05:11:19 C 17 06 31.90 -00 52 57.4 954
1998-02-24 05:13:29 C 17 06 31.99 -00 52 56.8 954
1998-02-24 05:15:40 C 17 06 32.08 -00 52 55.0 954
1998-02-24 05:17:52 C 17 06 32.16 -00 52 54.3 954
1998-02-24 05:20:03 C 17 06 32.25 -00 52 53.5 954
1998-02-24 05:22:14 C 17 06 32.34 -00 52 52.7 954
1998-02-24 05:24:25 C 17 06 32.42 -00 52 51.9 954
1998-02-24 05:26:47 C 17 06 32.52 -00 52 51.1 954