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
2022-01-08 16:56:28 B 05 36 22.79 +14 34 47.9 V O47
2022-01-08 17:12:39 B 05 36 22.02 +14 34 50.4 V O47
2022-01-09 06:12:58 C 05 35 47.01 +14 36 59.6 V T08
2022-01-09 06:15:38 C 05 35 46.90 +14 37 00.0 V T08
2022-01-09 06:19:39 C 05 35 46.70 +14 37 00.6 V T08
2022-01-09 07:10:15 C 05 35 44.36 +14 37 09.1 V T08
2022-01-09 12:39:28 C 05 35 29.640 +14 38 07.44 V P07
2022-01-09 12:41:06 C 05 35 29.558 +14 38 07.87 V P07
2022-01-09 13:41:20 C 05 35 26.789 +14 38 17.81 V P07
2022-01-09 14:30:45 C 05 35 24.497 +14 38 26.16 V P07
2022-01-09 15:27:14 C 05 35 21.888 +14 38 35.45 V P07
2022-01-10 07:09:02 C 05 34 40.54 +14 41 08.2 V T08
2022-01-10 07:11:41 C 05 34 40.42 +14 41 08.5 V T08
2022-01-10 07:15:41 C 05 34 40.25 +14 41 09.1 V T08
2022-01-10 07:49:58 C 05 34 38.68 +14 41 14.9 V T08
2022-01-10 16:42:46 B 05 34 15.33 +14 42 43.7 V O47
2022-01-10 16:58:18 B 05 34 14.64 +14 42 46.0 V O47
2022-01-10 17:13:55 B 05 34 13.96 +14 42 48.6 V O47
2022-01-12 06:37:58 C 05 32 39.63 +14 49 07.8 V T05
2022-01-12 06:40:37 C 05 32 39.52 +14 49 08.2 V T05
2022-01-12 06:45:54 C 05 32 39.29 +14 49 09.2 V T05
2022-01-12 07:23:51 C 05 32 37.68 +14 49 15.7 V T05
2022-01-13 19:23:02 C 05 31 11.08 +14 55 23.5 V L92
2022-01-13 19:25:06 C 05 31 10.97 +14 55 24.4 V L92
2022-01-13 19:27:10 C 05 31 10.99 +14 55 24.4 V L92
2022-01-13 19:31:17 C 05 31 10.67 +14 55 24.9 V L92
2022-01-13 19:39:38 C 05 31 10.47 +14 55 26.3 V L92
2022-01-15 17:30:37 C 05 29 26.65 +15 03 22.5 V L92
2022-01-15 17:36:48 C 05 29 26.43 +15 03 22.5 V L92
2022-01-15 17:38:52 C 05 29 26.39 +15 03 23.3 V L92
2022-01-15 22:26:51 C 05 29 15.53 +15 04 13.5 V G17
2022-01-15 22:38:31 C 05 29 15.12 +15 04 16.1 V G17
2022-01-19 18:08:34 C 05 26 11.66 +15 20 25.9 V A92
2022-01-19 18:30:53 C 05 26 10.87 +15 20 30.1 V A92
2022-01-19 18:51:44 C 05 26 10.21 +15 20 33.5 V A92
2022-01-21 09:19:51 C 05 25 01.88 +15 27 30.1 V T08
2022-01-21 09:23:50 C 05 25 01.76 +15 27 30.8 V T08
2022-01-21 09:31:11 C 05 25 01.54 +15 27 31.9 V T08
2022-01-21 09:52:25 C 05 25 00.90 +15 27 35.9 V T08
2022-01-22 03:23:29 C 05 24 31.781 +15 30 49.64 V W68
2022-01-22 03:28:53 C 05 24 31.615 +15 30 50.76 V W68
2022-01-22 03:37:39 C 05 24 31.356 +15 30 52.09 V W68
2022-01-22 03:52:46 C 05 24 30.934 +15 30 54.79 V W68
2022-01-22 10:04:13 C 05 24 20.81 +15 31 57.8 V T08
2022-01-22 10:09:31 C 05 24 20.67 +15 31 58.8 V T08
2022-01-22 10:31:49 C 05 24 20.04 +15 32 02.7 V T08
2022-01-22 10:39:48 C 05 24 19.83 +15 32 04.1 V T08
2022-01-22 21:48:17 C 05 24 02.28 +15 34 03.5 a 233
2022-01-22 21:54:22 C 05 24 02.10 +15 34 04.4 a 233
2022-01-22 22:00:27 C 05 24 01.98 +15 34 05.8 a 233
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)