1627 Ivar (1929 SH)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3973228500 ± 3.37e-09
Semi-major axis (a)1.8630580824 AU ± 4.99e-10
Inclination (i)8.45629236° ± 2.99e-07
Long. of Asc. Node (Ω)133.07459963° ± 2.39e-06
Arg. of Perihelion (ω)167.83961943° ± 2.63e-06
Mean Anomaly (M)311.46100560° ± 6.93e-07
Mean Motion (n)0.3875901077°/day ± 1.56e-10
Perihelion dist (q)1.12282254 AU ± 6.29e-09
Aphelion dist (Q)2.60329363 AU ± 6.32e-09
Orbital Period2.54296037 yr ± 1.02e-09
NGA Modelr2
A2-5.33141704e-16 ± 5.07e-16 AU/d²
Physical Parameters
H (abs. magnitude)12.79
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.120″
Uncertainty0
Orbit TypeAmor
MOID0.108765 AU
Observations Used13532
Radar Obs Used4
Gaia Obs Used222
Oppositions53
Arc Total1929-2025
First Observation Used1929-09-25
Last Observation Used2025-06-15
Observations (18178)
Date Type RA Dec Mag Band Observatory
2013-04-25 00:10:12 C 18 48 25.28 -04 01 44.3 q C73
2013-04-25 00:10:52 C 18 48 25.37 -04 01 44.0 q C73
2013-04-25 00:11:32 C 18 48 25.46 -04 01 43.7 q C73
2013-04-25 00:12:10 C 18 48 25.55 -04 01 43.4 q C73
2013-04-25 00:12:50 C 18 48 25.64 -04 01 42.9 q C73
2013-04-25 00:13:29 C 18 48 25.73 -04 01 42.6 q C73
2013-04-25 00:14:10 C 18 48 25.82 -04 01 42.4 q C73
2013-04-25 00:14:49 C 18 48 25.91 -04 01 42.1 q C73
2013-04-25 00:15:28 C 18 48 26.00 -04 01 41.7 q C73
2013-04-25 00:16:07 C 18 48 26.09 -04 01 41.4 q C73
2013-04-25 00:16:48 C 18 48 26.18 -04 01 41.1 q C73
2013-04-25 00:17:28 C 18 48 26.27 -04 01 40.6 q C73
2013-04-25 00:18:06 C 18 48 26.36 -04 01 40.3 q C73
2013-04-25 00:18:46 C 18 48 26.44 -04 01 40.0 q C73
2013-04-25 00:19:26 C 18 48 26.54 -04 01 39.7 q C73
2013-04-25 00:20:06 C 18 48 26.62 -04 01 39.3 q C73
2013-04-25 00:20:45 C 18 48 26.72 -04 01 39.0 q C73
2013-04-25 00:21:24 C 18 48 26.81 -04 01 38.7 q C73
2013-04-25 00:22:03 C 18 48 26.90 -04 01 38.3 q C73
2013-04-25 00:22:44 C 18 48 26.99 -04 01 38.0 q C73
2013-04-25 00:23:23 C 18 48 27.07 -04 01 37.7 q C73
2013-04-25 00:24:02 C 18 48 27.17 -04 01 37.3 q C73
2013-04-25 00:24:41 C 18 48 27.26 -04 01 36.9 q C73
2013-04-25 00:25:22 C 18 48 27.34 -04 01 36.7 q C73
2013-04-25 00:26:01 C 18 48 27.43 -04 01 36.4 q C73
2013-04-25 00:26:40 C 18 48 27.52 -04 01 36.0 q C73
2013-04-25 00:27:20 C 18 48 27.61 -04 01 35.6 q C73
2013-04-25 00:27:59 C 18 48 27.70 -04 01 35.3 q C73
2013-04-25 00:28:40 C 18 48 27.79 -04 01 35.0 q C73
2013-04-25 00:29:19 C 18 48 27.88 -04 01 34.7 q C73
2013-04-25 00:29:58 C 18 48 27.96 -04 01 34.3 q C73
2013-04-25 00:30:37 C 18 48 28.06 -04 01 34.0 q C73
2013-04-25 00:31:18 C 18 48 28.15 -04 01 33.6 q C73
2013-04-25 00:31:57 C 18 48 28.24 -04 01 33.3 q C73
2013-04-25 00:32:36 C 18 48 28.33 -04 01 33.0 q C73
2013-04-25 00:33:15 C 18 48 28.42 -04 01 32.7 q C73
2013-04-25 00:34:12 C 18 48 28.55 -04 01 32.2 q C73
2013-04-25 00:34:52 C 18 48 28.64 -04 01 31.8 q C73
2013-04-25 00:35:32 C 18 48 28.73 -04 01 31.6 q C73
2013-04-25 00:36:12 C 18 48 28.82 -04 01 31.2 q C73
2013-04-25 00:36:51 C 18 48 28.90 -04 01 30.9 q C73
2013-04-25 00:37:30 C 18 48 29.00 -04 01 30.5 q C73
2013-04-25 00:38:11 C 18 48 29.08 -04 01 30.2 q C73
2013-04-25 00:38:50 C 18 48 29.17 -04 01 29.8 q C73
2013-04-25 00:39:29 C 18 48 29.27 -04 01 29.5 q C73
2013-04-25 00:40:08 C 18 48 29.35 -04 01 29.2 q C73
2013-04-25 00:40:48 C 18 48 29.45 -04 01 28.9 q C73
2013-04-25 00:41:28 C 18 48 29.54 -04 01 28.5 q C73
2013-04-25 00:42:08 C 18 48 29.62 -04 01 28.1 q C73
2013-04-25 00:42:46 C 18 48 29.72 -04 01 27.9 q C73
Radar Observations (6)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
1985-07-08 08:00:00 20560 6 Hz 2380 -1 -1
1985-07-08.333333 2056000 600 Hz 2380 251 251
1985-07-09 08:09:00 202574571 16 us 2380 -1 -1
1985-07-09.339583 20257457100 16000 us 2380 251 251
2013-06-27 09:40:00 323904701.64 5 us 2380 -1 -1
2013-07-04 09:14:00 321083718.18 5 us 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)