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
2023-07-10 08:37:32 C 13 07 38.990 +05 31 01.27 q Q58
2023-07-10 08:42:08 C 13 07 39.274 +05 30 58.68 q Q58
2023-07-11 17:07:18 C 13 10 06.811 +05 05 15.72 V M22
2023-07-11 17:12:32 C 13 10 07.205 +05 05 11.54 V M22
2023-07-11 17:21:45 C 13 10 07.886 +05 05 04.16 V M22
2023-07-11 17:39:01 C 13 10 09.163 +05 04 50.30 V M22
2023-07-11 19:50:11 C 13 10 18.981 +05 02 53.97 V L92
2023-07-11 20:00:28 C 13 10 19.752 +05 02 45.59 V L92
2023-07-11 20:10:46 C 13 10 20.567 +05 02 36.98 V L92
2023-07-11 20:21:04 C 13 10 21.321 +05 02 29.25 V L92
2023-07-12 04:23:38 C 13 10 58.54 +04 56 01.7 q 463
2023-07-12 04:38:27 C 13 10 59.67 +04 55 49.9 q 463
2023-07-12 04:48:44 C 13 11 00.46 +04 55 41.5 q 463
2023-07-13 02:14:24 C 13 12 40.644 +04 38 35.63 V W68
2023-07-13 02:23:12 C 13 12 41.321 +04 38 29.69 V W68
2023-07-13 02:27:13 C 13 12 41.635 +04 38 24.58 V W68
2023-07-13 19:52:36 C 13 14 04.294 +04 24 03.15 V L92
2023-07-13 19:54:40 C 13 14 04.498 +04 24 00.49 V L92
2023-07-13 19:56:44 C 13 14 04.560 +04 23 59.79 V L92
2023-07-13 19:58:48 C 13 14 04.793 +04 23 57.16 V L92
2023-07-13 20:00:51 C 13 14 04.887 +04 23 55.31 V L92
2023-07-13 20:02:55 C 13 14 05.165 +04 23 53.50 V L92
2023-07-13 20:04:59 C 13 14 05.323 +04 23 51.84 V L92
2023-07-13 20:07:02 C 13 14 05.465 +04 23 51.37 V L92
2023-07-13 20:09:06 C 13 14 05.631 +04 23 48.68 V L92
2023-07-13 20:11:10 C 13 14 05.832 +04 23 47.46 V L92
2023-07-13 20:13:13 C 13 14 05.967 +04 23 44.85 V L92
2023-07-13 20:15:17 C 13 14 06.051 +04 23 43.57 V L92
2023-07-13 20:17:20 C 13 14 06.233 +04 23 42.23 V L92
2023-07-13 20:19:24 C 13 14 06.425 +04 23 40.31 V L92
2023-07-13 20:21:28 C 13 14 06.583 +04 23 37.91 V L92
2023-07-13 20:23:31 C 13 14 06.684 +04 23 36.53 V L92
2023-07-13 20:25:35 C 13 14 06.825 +04 23 35.39 V L92
2023-07-13 20:27:38 C 13 14 07.156 +04 23 33.38 V L92
2023-07-13 20:29:42 C 13 14 07.197 +04 23 31.75 V L92
2023-07-13 20:31:46 C 13 14 07.403 +04 23 29.88 V L92
2023-07-14 19:41:19 C 13 15 58.838 +04 04 28.03 V L92
2023-07-14 19:46:28 C 13 15 59.257 +04 04 24.01 V L92
2023-07-14 19:51:37 C 13 15 59.650 +04 04 19.44 V L92
2023-07-14 19:56:46 C 13 16 00.093 +04 04 14.96 V L92
2023-07-14 20:01:55 C 13 16 00.464 +04 04 11.22 V L92
2023-07-14 20:07:04 C 13 16 00.819 +04 04 06.61 V L92
2023-07-14 20:12:13 C 13 16 01.286 +04 04 03.17 V L92
2023-07-14 20:17:22 C 13 16 01.662 +04 03 58.69 V L92
2023-07-16 00:03:46 C 13 18 17.892 +03 41 04.34 V W68
2023-07-16 00:08:20 C 13 18 18.262 +03 41 00.60 V W68
2023-07-16 00:16:49 C 13 18 18.934 +03 40 53.44 V W68
2023-07-16 00:33:17 C 13 18 20.256 +03 40 39.61 V W68
2023-07-16 21:06:08 C 13 20 02.36 +03 23 11.3 X K83
2023-07-16 21:13:14 C 13 20 02.96 +03 23 05.3 X K83
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)