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
1972-08-29 22:19:50 A 06 20 33.44 +11 03 32.4 191
1972-08-29 22:27:48 A 06 20 34.41 +11 03 17.7 191
1972-08-31 22:42:12 A 06 27 08.41 +09 49 00.1 191
1972-09-01 01:45:00 A 06 27 32.92 +09 44 20.4 056
1972-09-01 01:56:00 A 06 27 34.19 +09 44 03.3 056
1972-09-01 02:15:59 A 06 27 36.85 +09 43 32.7 056
1972-09-01 02:23:00 A 06 27 37.91 +09 43 21.4 056
1972-09-03 02:05:59 A 06 33 54.97 +08 30 42.6 056
1972-09-03 02:19:00 A 06 33 56.72 +08 30 22.4 056
1972-09-03 02:28:00 A 06 33 57.86 +08 30 08.6 056
1972-09-04 02:08:59 A 06 37 00.82 +07 54 24.1 056
1972-09-04 02:21:00 A 06 37 02.74 +07 54 09.4 056
1972-09-04 11:23:00 A 06 38 11.79 +07 40 34.1 693
1972-09-04 11:30:59 A 06 38 12.78 +07 40 22.2 693
1972-09-05 19:28:50 A 06 42 13.61 +06 52 34.5 370
1972-09-12 19:14:30 A 07 01 58.91 +02 48 50.2 370
1972-09-16 18:47:59 A 07 12 16.22 +00 35 41.6 370
1972-09-18 18:20:59 A 07 17 08.48 -00 29 03.3 380
1972-09-18 18:39:31 A 07 17 10.22 -00 29 24.3 385
1972-09-18 18:51:33 A 07 17 11.45 -00 29 42.5 385
1972-09-20 19:23:59 A 07 21 59.55 -01 34 39.7 380
1972-09-20 19:36:29 A 07 22 01.01 -01 34 57.2 370
1972-10-01 19:39:30 A 07 45 17.05 -07 09 31.5 370
1972-10-04 19:42:29 A 07 50 49.04 -08 35 36.4 370
1972-10-06 20:06:00 A 07 54 20.10 -09 32 07.2 370
1972-10-12 20:03:00 A 08 03 53.00 -12 14 37.8 370
1972-11-01 19:36:00 A 08 25 40.51 -20 16 07.5 370
1972-11-04 02:56:03 A 08 27 10.56 -21 05 54.4 020
1972-11-04 20:02:30 A 08 27 35.30 -21 20 47.0 879
1972-11-08 02:58:30 A 08 29 14.60 -22 28 52.5 056
1972-11-08 03:38:59 A 08 29 15.39 -22 29 20.8 056
1972-11-08 19:41:00 A 08 29 32.36 -22 42 49.2 380
1972-11-12 20:11:30 A 08 30 49.81 -24 01 19.5 370
1972-11-13 22:29:46 A 08 31 04.03 -24 21 54.7 191
1972-11-14 22:07:41 A 08 31 13.91 -24 40 06.8 191
1972-11-15 22:22:39 A 08 31 21.48 -24 58 31.5 191
1972-12-02 18:02:59 A 08 27 06.21 -29 14 57.3 380
1972-12-02 19:32:30 A 08 27 04.00 -29 15 46.7 380
1972-12-04 18:11:59 A 08 25 49.0 -29 38 19 370
1973-02-06 05:48:59 A 07 15 24.94 -24 40 12.7 693
1973-02-27 01:04:40 A 07 08 52.42 -18 38 11.5 821
1973-02-27 01:48:39 A 07 08 52.35 -18 37 38.7 821
1978-05-01 06:15:28 A 16 04 44.97 +07 59 09.3 A 801
1978-05-12 05:52:20 A 15 55 17.56 +10 01 30.7 A 801
1978-06-06 05:04:33 A 15 30 10.92 +13 23 05.8 A 801
1978-07-01 04:13:59 A 15 10 11.04 +14 09 29.2 A 801
1978-10-03 00:42:26 A 16 03 50.92 +03 40 45.4 A 801
1984-01-28 08:00:00 A 14 53 49.89 -06 35 38.4 809
1984-03-29 07:06:17 A 14 51 54.60 -01 46 39.7 695
1984-04-03 09:46:58 A 14 49 18.88 -01 10 51.2 695