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
2023-04-20 21:47:19 V 12 48 57.24 +14 08 46.3 V 270
2023-04-20 21:47:19 v 1 006.94402 +48.09096 270
2023-04-20 22:09:21 C 12 48 55.97 +14 08 54.8 V M53
2023-04-20 22:13:07 V 12 48 55.81 +14 08 57.6 V 270
2023-04-20 22:13:07 v 1 006.94402 +48.09096 270
2023-04-21 09:44:07 C 12 48 18.283 +14 14 09.46 V T05
2023-04-21 09:49:17 C 12 48 17.988 +14 14 11.72 V T05
2023-04-21 09:58:19 C 12 48 17.470 +14 14 15.61 V T05
2023-04-21 10:45:53 C 12 48 14.755 +14 14 36.31 V T05
2023-04-21 12:31:32 V 12 48 09.62 +14 15 20.1 V 270
2023-04-21 12:31:32 v 1 134.17913 +34.51203 270
2023-04-21 12:44:02 V 12 48 08.92 +14 15 25.6 V 270
2023-04-21 12:44:02 v 1 134.17913 +34.51203 270
2023-04-21 12:56:33 V 12 48 08.22 +14 15 31.2 V 270
2023-04-21 12:56:33 v 1 134.17913 +34.51203 270
2023-04-21 13:09:15 V 12 48 07.50 +14 15 36.8 V 270
2023-04-21 13:09:15 v 1 134.17913 +34.51203 270
2023-04-21 20:19:33 C 12 47 44.360 +14 18 42.29 V L92
2023-04-21 20:29:28 C 12 47 43.822 +14 18 47.71 V L92
2023-04-21 20:39:53 C 12 47 43.253 +14 18 51.20 V L92
2023-04-21 20:50:17 C 12 47 42.596 +14 18 55.08 V L92
2023-04-21 21:25:20 C 12 47 40.70 +14 19 07.8 V M53
2023-04-21 21:54:13 V 12 47 39.08 +14 19 20.6 V 270
2023-04-21 21:54:13 v 1 013.56516 +52.62631 270
2023-04-21 21:54:20 C 12 47 39.08 +14 19 20.7 V M53
2023-04-21 22:06:43 V 12 47 38.37 +14 19 26.0 V 270
2023-04-21 22:06:43 v 1 013.56516 +52.62631 270
2023-04-21 22:12:52 V 12 47 38.00 +14 19 27.5 V 270
2023-04-21 22:12:52 v 1 024.63084 +60.79171 270
2023-04-21 22:19:14 V 12 47 37.67 +14 19 31.3 V 270
2023-04-21 22:19:14 v 1 013.56516 +52.62631 270
2023-04-21 22:24:53 C 12 47 37.40 +14 19 33.4 V M53
2023-04-21 22:25:35 V 12 47 37.33 +14 19 32.6 V 270
2023-04-21 22:25:35 v 1 024.63084 +60.79171 270
2023-04-21 22:31:56 V 12 47 36.95 +14 19 37.0 V 270
2023-04-21 22:31:56 v 1 013.56516 +52.62631 270
2023-04-21 22:38:17 V 12 47 36.61 +14 19 38.2 V 270
2023-04-21 22:38:17 v 1 024.63084 +60.79171 270
2023-04-21 22:50:48 V 12 47 35.93 +14 19 43.4 V 270
2023-04-21 22:50:48 v 1 024.63084 +60.79171 270
2023-04-22 11:19:11 V 12 46 56.47 +14 25 05.4 V 270
2023-04-22 11:19:11 v 1 134.17930 +34.51216 270
2023-04-22 11:31:45 V 12 46 55.77 +14 25 10.5 V 270
2023-04-22 11:31:45 v 1 134.17930 +34.51216 270
2023-04-22 11:44:16 V 12 46 55.05 +14 25 15.9 V 270
2023-04-22 11:44:16 v 1 134.17930 +34.51216 270
2023-04-22 11:57:02 V 12 46 54.32 +14 25 21.3 V 270
2023-04-22 11:57:02 v 1 134.17930 +34.51216 270
2023-04-22 19:34:34 C 12 46 29.82 +14 28 27.9 c M31
2023-04-22 19:39:57 C 12 46 29.53 +14 28 30.1 c M31
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)