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
2025-03-02 21:15:45 C 08 07 57.670 +20 36 14.58 Z C23
2025-03-02 21:37:39 C 08 07 57.024 +20 36 18.65 Z C23
2025-03-02 22:08:43 C 08 07 56.071 +20 36 24.77 Z C23
2025-03-03 08:07:56 C 08 07 39.048 +20 38 18.35 V T05
2025-03-03 08:12:31 C 08 07 38.911 +20 38 19.07 V T05
2025-03-03 08:21:15 C 08 07 38.650 +20 38 20.72 V T05
2025-03-03 08:35:50 C 08 07 38.220 +20 38 23.42 V T05
2025-03-03 18:24:16 B 08 07 21.936 +20 40 09.40 W L92
2025-03-03 18:29:39 B 08 07 21.842 +20 40 10.51 W L92
2025-03-03 18:34:45 B 08 07 21.742 +20 40 11.58 W L92
2025-03-03 18:39:50 B 08 07 21.547 +20 40 12.23 W L92
2025-03-03 18:44:56 B 08 07 21.374 +20 40 12.95 W L92
2025-03-03 19:41:04 B 08 07 19.829 +20 40 22.26 V L65
2025-03-03 19:45:15 B 08 07 19.702 +20 40 22.98 V L65
2025-03-03 19:49:26 B 08 07 19.584 +20 40 23.66 V L65
2025-03-04 00:13:33 B 08 07 12.142 +20 41 11.65 q Y84
2025-03-04 00:27:23 B 08 07 11.755 +20 41 14.21 q Y84
2025-03-04 00:43:44 B 08 07 11.290 +20 41 17.20 q Y84
2025-03-04 07:55:46 C 08 06 59.758 +20 42 37.15 V T05
2025-03-04 08:01:46 C 08 06 59.587 +20 42 38.20 V T05
2025-03-04 08:12:13 C 08 06 59.297 +20 42 40.18 V T05
2025-03-04 08:26:55 C 08 06 58.879 +20 42 42.77 V T05
2025-03-04 20:11:36 C 08 06 40.327 +20 44 44.92 Z C23
2025-03-04 21:02:12 C 08 06 38.954 +20 44 53.99 Z C23
2025-03-04 21:42:51 C 08 06 37.846 +20 45 00.83 Z C23
2025-03-04 22:51:02 B 08 06 36.082 +20 45 12.74 q Y84
2025-03-04 22:56:34 B 08 06 35.897 +20 45 13.97 q Y84
2025-03-04 23:02:04 B 08 06 35.710 +20 45 14.94 q Y84
2025-03-05 01:29:08 B 08 06 31.829 +20 45 40.25 q Y84
2025-03-05 01:34:41 B 08 06 31.687 +20 45 41.26 q Y84
2025-03-05 01:40:11 B 08 06 31.519 +20 45 42.16 q Y84
2025-03-05 07:41:23 C 08 06 22.459 +20 46 47.96 V T08
2025-03-05 07:48:47 C 08 06 22.262 +20 46 49.19 V T08
2025-03-05 08:04:02 C 08 06 21.850 +20 46 51.85 V T08
2025-03-05 08:08:01 C 08 06 21.744 +20 46 52.50 V T08
2025-03-06 09:00:24 C 08 05 44.743 +20 51 05.87 V T05
2025-03-06 09:09:56 C 08 05 44.494 +20 51 07.49 V T05
2025-03-06 09:20:30 C 08 05 44.232 +20 51 09.29 V T05
2025-03-06 09:36:35 C 08 05 43.826 +20 51 11.95 V T05
2025-03-06 21:12:55 C 08 05 27.473 +20 53 05.03 Z C23
2025-03-06 21:38:12 C 08 05 26.854 +20 53 08.81 Z C23
2025-03-06 22:20:24 C 08 05 25.865 +20 53 16.04 Z C23
2025-03-07 20:50:06 C 08 04 55.452 +20 56 53.88 Z C23
2025-03-07 21:32:10 C 08 04 54.454 +20 57 00.58 Z C23
2025-03-07 21:47:58 C 08 04 54.101 +20 57 02.81 Z C23
2025-03-10 18:59:43 C 08 03 31.666 +21 07 28.27 Z C23
2025-03-10 19:27:29 C 08 03 31.159 +21 07 32.38 Z C23
2025-03-10 19:54:00 C 08 03 30.634 +21 07 35.87 Z C23
2025-03-11 21:08:13 B 08 03 04.807 +21 11 09.38 q J51
2025-03-11 21:19:52 B 08 03 04.606 +21 11 10.97 q J51
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)