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
1959-06-06 10:03:38 A 17 36 49.89 +26 16 03.2 689
1959-06-12 09:30:12 A 17 29 36.17 +28 07 59.5 662
1959-06-12 10:40:12 A 17 29 32.26 +28 08 51.0 662
1959-06-28 06:04:40 A 17 06 55.97 +31 52 37.8 689
1959-06-28 06:52:32 A 17 06 52.74 +31 52 58.5 689
1959-07-04 05:36:10 A 16 57 55.97 +32 43 17.9 689
1959-07-04 05:55:07 A 16 57 54.75 +32 43 22.3 689
1959-07-11 04:49:10 A 16 47 55.21 +33 16 16.6 689
1959-07-11 05:07:09 A 16 47 54.06 +33 16 18.1 689
1959-07-26 05:12:51 A 16 30 37.40 +32 57 19.1 689
1959-07-26 05:35:17 A 16 30 36.54 +32 57 14.7 689
1959-08-29 04:00:26 A 16 27 19.14 +26 25 42.4 689
1959-08-29 04:46:18 A 16 27 20.47 +26 25 08.3 689
1959-09-06 03:04:33 A 16 34 38.72 +23 56 54.5 689
1959-09-06 03:12:30 A 16 34 39.13 +23 56 48.2 689
1959-09-21 02:33:38 A 16 57 02.50 +17 59 54.3 689
1959-09-21 02:40:37 A 16 57 02.99 +17 59 45.8 689
1959-09-27 03:38:13 A 17 09 27.98 +14 53 30.9 689
1959-09-27 03:42:15 A 17 09 28.33 +14 53 25.1 689
1959-10-11 02:23:01 A 17 47 18.31 +05 00 57.1 689
1959-10-11 02:25:29 A 17 47 18.63 +05 00 51.6 689
1959-10-21 01:57:56 A 18 25 08.07 -05 45 13.0 689
1959-10-21 01:59:55 A 18 25 08.45 -05 45 19.3 689
1959-10-26 01:50:04 A 18 49 06.94 -12 42 14.3 689
1959-10-26 01:53:03 A 18 49 07.59 -12 42 25.4 689
1959-11-05 01:39:27 A 19 52 32.96 -29 05 50.0 689
1959-11-05 01:46:26 A 19 52 35.12 -29 06 19.7 689
1960-01-23 03:57:57 A 04 04 21.48 -30 14 15.4 689
1960-01-23 04:11:26 A 04 04 22.65 -30 14 00.6 689
1960-02-15 02:44:02 A 04 48 45.29 -20 43 29.0 689
1960-02-15 02:51:01 A 04 48 45.78 -20 43 23.3 689
1960-03-16 03:18:24 A 05 41 39.26 -11 22 53.4 689
1960-03-16 03:54:19 A 05 41 41.78 -11 22 31.5 689
1960-04-18 03:47:59 A 06 37 27.46 -05 08 26.2 689
1965-09-17 03:25:04 A 15 16 24.04 +03 03 45.3 689
1965-09-21 03:14:50 A 15 20 59.15 +02 37 20.2 689
1965-09-22 03:12:48 A 15 22 10.10 +02 30 41.4 689
1965-09-24 03:11:41 A 15 24 35.33 +02 17 29.6 689
1965-09-25 03:06:39 A 15 25 48.84 +02 10 53.6 689
1972-03-11 11:10:39 A 19 03.83 +03 48.6 695
1972-03-11 12:06:54 A 19 03.92 +03 49.1 695
1972-05-14 08:07:03 A 21 44 39.84 +25 04 43.7 801
1972-05-16 17:41:00 A 21 52 44.4 +26 04 22 370
1972-05-16 18:13:59 A 21 52 48.8 +26 04 55 370
1972-05-20 18:42:00 A 22 06 55.77 +27 44 19.4 370
1972-06-03 23:12:33 A 23 03 31.03 +33 13 07.3 046
1972-06-03 23:19:33 A 23 03 32.40 +33 13 12.4 046
1972-06-04 23:24:14 A 23 07 59.51 +33 34 05.0 046
1972-06-04 23:30:59 A 23 08 00.91 +33 34 11.3 046
1972-06-05 22:55:30 A 23 12 24.24 +33 54 04.4 046