2012 DH4

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5766034502 ± 3.19e-08
Semi-major axis (a)2.0318688844 AU ± 5.22e-08
Inclination (i)14.46791222° ± 6.62e-06
Long. of Asc. Node (Ω)168.97603129° ± 2.76e-06
Arg. of Perihelion (ω)69.16910165° ± 9.55e-06
Mean Anomaly (M)246.79734422° ± 6.19e-05
Mean Motion (n)0.3403053342°/day ± 1.31e-08
Perihelion dist (q)0.86028628 AU ± 6.85e-08
Aphelion dist (Q)3.20345149 AU ± 1.05e-07
Orbital Period2.89629984 yr ± 1.12e-07
Physical Parameters
H (abs. magnitude)20.70
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.313″
Uncertainty0
Orbit TypeApollo
MOID0.064284 AU
Observations Used365
Radar Obs Used2
Oppositions1
Arc Total2012-2015
First Observation Used2012-02-18
Last Observation Used2015-10-07
Observations (369)
Date Type RA Dec Mag Band Observatory
2012-03-24 00:17:48 C 16 49 41.97 +63 36 59.2 t J69
2012-03-24 22:38:02 C 17 47 36.73 +63 36 06.0 t J69
2012-03-24 22:44:58 C 17 47 53.65 +63 35 55.3 t J69
2012-03-24 23:04:28 C 17 48 41.20 +63 35 24.2 t J69
2012-03-27 01:50:29 C 19 26 05.49 +59 54 08.1 c A24
2012-03-27 01:52:43 C 19 26 08.67 +59 53 56.1 c A24
2012-08-20 07:26:19 C 00 26 19.13 +06 15 18.9 u H21
2012-08-20 07:47:47 C 00 26 17.96 +06 14 56.9 u H21
2012-08-20 08:10:47 C 00 26 16.64 +06 14 33.9 u H21
2012-08-21 07:33:16 C 00 25 02.16 +05 50 47.8 u H21
2012-08-21 07:53:46 C 00 25 00.98 +05 50 27.2 u H21
2012-08-21 08:29:22 C 00 24 58.98 +05 49 50.7 u H21
2015-01-29 06:42:21 C 15 04 51.97 -17 27 32.0 t 950
2015-01-29 06:44:38 C 15 04 52.60 -17 27 32.1 t 950
2015-01-29 06:46:54 C 15 04 53.19 -17 27 32.7 t 950
2015-09-17 10:21:07 C 01 10 44.911 -00 52 13.86 t 568
2015-09-17 10:33:51 C 01 10 44.188 -00 52 22.45 t 568
2015-10-07 11:29:06 C 00 43 44.005 -05 47 01.30 t 568
2015-10-07 11:46:06 C 00 43 43.081 -05 47 09.99 t 568
Radar Observations (2)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2012-03-11 05:46:00 214010.3 1 Hz 2380 -1 -1
2012-03-12 05:48:00 205352.8 0.2 Hz 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)