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
2023-07-17 19:42:16 C 13 21 56.433 +03 04 02.36 V L92
2023-07-17 19:47:25 C 13 21 56.851 +03 03 58.50 V L92
2023-07-17 19:52:35 C 13 21 57.288 +03 03 53.79 V L92
2023-07-17 19:57:44 C 13 21 57.751 +03 03 48.81 V L92
2023-07-17 20:02:53 C 13 21 58.154 +03 03 45.00 V L92
2023-07-17 20:08:03 C 13 21 58.557 +03 03 40.53 V L92
2023-07-17 20:13:12 C 13 21 59.001 +03 03 36.38 V L92
2023-07-17 20:18:21 C 13 21 59.433 +03 03 32.50 V L92
2023-07-17 20:54:18 B 13 22 02.58 +03 03 00.2 Z C95
2023-07-17 21:04:47 B 13 22 03.45 +03 02 51.2 Z C95
2023-07-17 21:15:15 B 13 22 04.34 +03 02 42.4 Z C95
2023-07-18 23:44:40 C 13 24 20.477 +02 40 13.12 V W68
2023-07-18 23:58:33 C 13 24 21.643 +02 40 00.95 V W68
2023-07-19 00:12:31 C 13 24 22.817 +02 39 49.03 V W68
2023-07-20 09:18:44 C 13 27 15.37 +02 11 08.2 q Q68
2023-07-20 09:35:47 C 13 27 17.44 +02 10 52.7 q Q68
2023-07-20 09:36:24 C 13 27 17.48 +02 10 52.0 q Q68
2023-07-20 09:37:01 C 13 27 17.54 +02 10 51.5 q Q68
2023-07-20 10:49:05 C 13 27 23.74 +02 09 48.7 q Q68
2023-07-20 10:49:48 C 13 27 23.81 +02 09 47.6 q Q68
2023-07-20 10:50:26 C 13 27 23.87 +02 09 47.2 q Q68
2023-07-21 08:36:07 C 13 29 20.03 +01 50 42.2 q Q68
2023-07-21 08:36:45 C 13 29 20.06 +01 50 41.6 q Q68
2023-07-21 08:37:24 C 13 29 20.13 +01 50 41.1 q Q68
2023-07-21 09:10:50 C 13 29 23.03 +01 50 11.5 q Q68
2023-07-21 09:11:28 C 13 29 23.08 +01 50 11.1 q Q68
2023-07-21 09:12:10 C 13 29 23.14 +01 50 10.5 q Q68
2023-07-22 19:50:48 C 13 32 30.714 +01 19 15.84 V L92
2023-07-22 20:01:00 C 13 32 31.597 +01 19 06.52 V L92
2023-07-22 20:11:12 C 13 32 32.413 +01 18 57.41 V L92
2023-07-22 20:21:24 C 13 32 33.431 +01 18 47.97 V L92
2023-07-28 00:21:28 C 13 44 17.470 -00 34 02.60 V W68
2023-07-28 00:28:41 C 13 44 18.158 -00 34 09.30 V W68
2023-07-28 00:32:34 C 13 44 18.540 -00 34 13.08 V W68
2023-07-28 00:46:16 C 13 44 19.855 -00 34 25.93 V W68
2023-07-28 00:52:08 C 13 44 20.405 -00 34 31.33 V W68
2023-07-28 00:56:43 C 13 44 20.846 -00 34 35.62 V W68
2023-07-28 01:06:29 C 13 44 21.763 -00 34 44.44 V W68
2023-07-28 01:34:42 C 13 44 24.509 -00 35 11.08 V W68
2023-07-31 00:02:27 C 13 51 27.163 -01 41 28.32 V W68
2023-07-31 00:07:02 C 13 51 27.617 -01 41 32.64 V W68
2023-07-31 00:19:42 C 13 51 28.877 -01 41 44.66 V W68
2023-07-31 00:34:07 C 13 51 30.312 -01 41 58.38 V W68
2023-08-01 01:10:21 C 13 54 01.625 -02 05 26.66 V W68
2023-08-01 01:22:12 C 13 54 02.827 -02 05 38.00 V W68
2023-08-01 01:26:14 C 13 54 03.235 -02 05 41.86 V W68
2023-08-01 01:40:48 C 13 54 04.714 -02 05 55.75 V W68
2023-08-01 18:13:18 C 13 55 47.779 -02 21 47.84 V M22
2023-08-01 18:28:52 C 13 55 49.370 -02 22 02.86 V M22
2023-08-01 18:37:27 C 13 55 50.249 -02 22 11.10 V M22
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)