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
2007-03-13 00:12:24 C 06 53 58.24 +21 03 55.5 c A24
2007-03-13 20:46:39 C 06 54 07.29 +21 06 01.3 c A24
2007-03-13 21:02:00 C 06 54 07.41 +21 06 02.7 c A24
2007-03-13 21:17:25 C 06 54 07.51 +21 06 04.2 c A24
2007-03-13 21:29:22 C 06 54 07.60 +21 06 05.6 c A24
2007-03-13 21:30:48 C 06 54 07.62 +21 06 05.5 c A24
2007-03-13 21:41:39 C 06 54 07.69 +21 06 06.7 c A24
2007-03-13 21:51:55 C 06 54 07.79 +21 06 07.8 c A24
2007-03-13 22:01:46 C 06 54 07.83 +21 06 08.9 c A24
2007-03-13 22:03:11 C 06 54 07.90 +21 06 09.2 c A24
2007-03-13 22:13:51 C 06 54 07.93 +21 06 10.2 c A24
2007-03-13 22:23:51 C 06 54 08.02 +21 06 11.0 c A24
2007-03-13 22:33:29 C 06 54 08.07 +21 06 11.7 c A24
2007-03-13 22:34:54 C 06 54 08.08 +21 06 12.1 c A24
2007-03-13 22:47:32 C 06 54 08.18 +21 06 13.1 c A24
2007-03-13 23:03:04 C 06 54 08.29 +21 06 14.7 c A24
2007-03-13 23:20:29 C 06 54 08.41 +21 06 16.5 c A24
2007-03-13 23:38:07 C 06 54 08.54 +21 06 18.2 c A24
2007-03-13 23:55:22 C 06 54 08.66 +21 06 19.9 c A24
2007-03-14 00:14:11 C 06 54 08.79 +21 06 21.7 c A24
2007-03-14 20:35:35 C 06 54 19.22 +21 08 22.6 c A24
2007-03-14 20:53:18 C 06 54 19.38 +21 08 24.3 c A24
2007-03-14 21:14:37 C 06 54 19.57 +21 08 26.5 c A24
2007-03-14 21:16:05 C 06 54 19.56 +21 08 26.4 c A24
2007-03-14 21:25:47 C 06 54 19.68 +21 08 27.5 c A24
2007-03-14 21:36:55 C 06 54 19.76 +21 08 28.3 c A24
2007-03-14 21:48:04 C 06 54 19.85 +21 08 29.2 c A24
2007-03-14 22:02:59 C 06 54 19.98 +21 08 31.4 c A24
2007-03-14 22:18:35 C 06 54 20.08 +21 08 32.2 c A24
2007-03-14 22:34:10 C 06 54 20.22 +21 08 34.3 c A24
2007-03-14 22:50:26 C 06 54 20.36 +21 08 35.6 c A24
2007-03-15 19:52:11 C 06 54 32.57 +21 10 37.2 c A24
2007-03-15 20:07:22 C 06 54 32.72 +21 10 38.4 c A24
2007-03-15 20:23:15 C 06 54 32.84 +21 10 39.9 c A24
2007-03-15 20:24:44 C 06 54 32.88 +21 10 40.2 c A24
2007-03-15 20:32:21 C 06 54 32.95 +21 10 40.8 c A24
2007-03-15 20:41:27 C 06 54 33.02 +21 10 41.9 c A24
2007-03-15 20:49:05 C 06 54 33.04 +21 10 42.5 c A24
2007-03-15 20:50:33 C 06 54 33.06 +21 10 42.9 c A24
2007-03-15 20:58:11 C 06 54 33.16 +21 10 43.6 c A24
2007-03-15 21:07:19 C 06 54 33.25 +21 10 44.2 c A24
2007-03-15 21:14:58 C 06 54 33.35 +21 10 45.0 c A24
2007-03-15 21:16:29 C 06 54 33.34 +21 10 44.8 c A24
2007-03-15 21:31:21 C 06 54 33.49 +21 10 46.2 c A24
2007-03-15 21:46:02 C 06 54 33.62 +21 10 47.6 c A24
2007-03-15 22:03:04 C 06 54 33.79 +21 10 49.3 c A24
2007-03-15 22:19:56 C 06 54 33.95 +21 10 50.8 c A24
2007-03-15 23:05:02 C 06 54 34.421 +21 10 53.2 r 084
2007-03-15 23:08:12 C 06 54 34.476 +21 10 53.5 r 084
2007-03-16 19:46:33 C 06 54 47.87 +21 12 51.2 c A24
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)