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
2023-03-21 12:34:08 C 13 24 23.566 +06 47 39.34 V T05
2023-03-21 13:13:47 C 13 24 22.195 +06 48 04.21 V T05
2023-03-21 23:28:23 C 13 24 02.590 +06 54 40.14 V M22
2023-03-21 23:30:59 C 13 24 02.494 +06 54 41.83 V M22
2023-03-21 23:38:34 C 13 24 02.227 +06 54 46.66 V M22
2023-03-22 00:13:47 C 13 24 00.989 +06 55 08.87 V M22
2023-03-22 05:25:34 C 13 23 50.849 +06 58 25.68 V W68
2023-03-22 05:30:08 C 13 23 50.686 +06 58 28.52 V W68
2023-03-22 05:34:42 C 13 23 50.525 +06 58 31.44 V W68
2023-03-22 06:05:39 C 13 23 49.423 +06 58 51.06 V W68
2023-03-22 22:01:28 C 13 23 17.52 +07 08 46.2 V M26
2023-03-22 22:04:27 C 13 23 17.42 +07 08 48.1 V M26
2023-03-22 22:07:26 C 13 23 17.31 +07 08 50.1 V M26
2023-03-23 05:25:41 C 13 23 02.014 +07 13 41.77 V W68
2023-03-23 05:28:57 C 13 23 01.901 +07 13 43.90 V W68
2023-03-23 05:36:50 C 13 23 01.606 +07 13 48.76 V W68
2023-03-23 05:58:38 C 13 23 00.802 +07 14 02.72 V W68
2023-03-23 17:17:12 C 13 22 37.073 +07 21 16.09 V P07
2023-03-23 18:26:48 C 13 22 34.397 +07 22 00.80 V P07
2023-03-23 19:51:35 C 13 22 31.183 +07 22 55.16 V P07
2023-03-23 19:54:41 C 13 22 31.046 +07 22 56.93 V P07
2023-03-23 21:12:48 C 13 22 28.133 +07 23 46.93 V P07
2023-03-25 03:06:47 C 13 21 23.30 +07 43 01.6 q X33
2023-03-25 03:09:16 C 13 21 23.20 +07 43 03.4 q X33
2023-03-25 03:11:46 C 13 21 23.10 +07 43 05.0 q X33
2023-03-25 11:49:50 C 13 21 03.108 +07 48 37.08 V T05
2023-03-25 11:59:30 C 13 21 02.707 +07 48 43.38 V T05
2023-03-25 12:04:04 C 13 21 02.527 +07 48 46.30 V T05
2023-03-25 12:27:07 C 13 21 01.582 +07 49 01.27 V T05
2023-03-26 03:00:51 C 13 20 28.459 +07 58 38.24 V W68
2023-03-26 03:51:11 C 13 20 26.395 +07 59 11.22 V W68
2023-03-26 04:11:00 C 13 20 25.565 +07 59 24.11 V W68
2023-03-26 04:46:39 C 13 20 24.091 +07 59 47.47 V W68
2023-03-26 08:13:00 C 13 20 15.864 +08 01 51.17 V 703
2023-03-26 08:20:32 C 13 20 15.544 +08 01 56.14 V 703
2023-03-26 08:28:05 C 13 20 15.227 +08 02 01.14 V 703
2023-03-26 08:35:38 C 13 20 14.910 +08 02 06.04 V 703
2023-03-27 02:03:00 B 13 19 33.01 +08 13 27.2 V L65
2023-03-27 02:19:14 B 13 19 32.34 +08 13 37.9 V L65
2023-03-27 02:31:24 B 13 19 31.84 +08 13 45.7 V L65
2023-03-27 06:20:38 C 13 19 22.682 +08 16 29.78 V W68
2023-03-27 06:25:14 C 13 19 22.483 +08 16 32.77 V W68
2023-03-27 07:16:26 C 13 19 20.273 +08 17 06.32 V W68
2023-03-27 07:57:19 C 13 19 18.506 +08 17 32.93 V W68
2023-03-27 22:17:56 C 13 18 43.704 +08 26 44.63 V 160
2023-03-27 22:22:24 C 13 18 43.510 +08 26 47.47 V 160
2023-03-27 22:26:53 C 13 18 43.330 +08 26 50.53 V 160
2023-03-28 19:16:59 C 13 17 50.924 +08 40 32.04 V L92
2023-03-28 19:27:06 C 13 17 50.553 +08 40 38.90 V L92
2023-03-28 19:37:46 C 13 17 50.017 +08 40 45.81 V L92
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)