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
2023-06-04 19:57:14 C 12 25 43.109 +14 08 11.79 V 089
2023-06-04 19:59:36 C 12 25 43.149 +14 08 10.84 V 089
2023-06-04 20:01:58 C 12 25 43.209 +14 08 09.79 V 089
2023-06-06 08:21:01 C 12 26 30.091 +13 53 25.08 V T05
2023-06-06 08:24:57 C 12 26 30.185 +13 53 23.28 V T05
2023-06-06 08:32:47 C 12 26 30.341 +13 53 19.97 V T05
2023-06-06 09:04:42 C 12 26 30.998 +13 53 06.36 V T05
2023-06-06 19:00:15 C 12 26 45.184 +13 48 51.09 V 089
2023-06-06 19:02:37 C 12 26 45.234 +13 48 50.55 V 089
2023-06-06 19:04:59 C 12 26 45.284 +13 48 48.94 V 089
2023-06-06 19:07:21 C 12 26 45.371 +13 48 48.07 V 089
2023-06-06 19:09:43 C 12 26 45.409 +13 48 47.27 V 089
2023-06-06 19:12:05 C 12 26 45.443 +13 48 45.84 V 089
2023-06-06 19:14:27 C 12 26 45.516 +13 48 45.11 V 089
2023-06-06 19:16:49 C 12 26 45.566 +13 48 44.25 V 089
2023-06-06 19:19:11 C 12 26 45.613 +13 48 43.11 V 089
2023-06-06 19:21:33 C 12 26 45.660 +13 48 41.98 V 089
2023-06-07 04:36:12 C 12 26 59.003 +13 44 47.58 V G96
2023-06-07 04:43:45 C 12 26 59.168 +13 44 44.30 V G96
2023-06-07 04:51:18 C 12 26 59.334 +13 44 41.10 V G96
2023-06-07 04:58:52 C 12 26 59.579 +13 44 36.96 V G96
2023-06-08 19:40:51 C 12 27 59.713 +13 27 33.95 V L92
2023-06-08 19:51:03 C 12 27 59.975 +13 27 29.34 V L92
2023-06-08 20:01:30 C 12 28 00.230 +13 27 24.90 V L92
2023-06-08 20:11:41 C 12 28 00.496 +13 27 20.12 V L92
2023-06-13 00:33:45 C 12 31 07.289 +12 39 33.80 V W68
2023-06-13 00:48:49 C 12 31 07.764 +12 39 26.21 V W68
2023-06-13 01:00:59 C 12 31 08.153 +12 39 20.02 V W68
2023-06-13 01:06:15 C 12 31 08.318 +12 39 17.35 V W68
2023-06-14 07:03:01 C 12 32 12.329 +12 23 48.48 V T05
2023-06-14 07:10:16 C 12 32 12.574 +12 23 44.66 V T05
2023-06-14 07:34:41 C 12 32 13.406 +12 23 31.92 V T05
2023-06-14 07:39:27 C 12 32 13.570 +12 23 29.40 V T05
2023-06-16 00:19:37 C 12 33 46.975 +12 02 05.10 V W68
2023-06-16 00:23:37 C 12 33 47.119 +12 02 03.05 V W68
2023-06-16 00:39:09 C 12 33 47.695 +12 01 54.62 V W68
2023-06-16 00:46:58 C 12 33 47.990 +12 01 50.34 V W68
2023-06-16 22:26:22 V 12 34 40.18 +11 49 46.7 V 270
2023-06-16 22:26:22 v 1 007.40000 +50.52000 270
2023-06-16 22:36:42 V 12 34 40.60 +11 49 41.3 V 270
2023-06-16 22:36:42 v 1 007.40000 +50.52000 270
2023-06-16 23:23:54 V 12 34 42.47 +11 49 14.1 V 270
2023-06-16 23:23:54 v 1 007.40000 +50.52000 270
2023-06-16 23:36:25 V 12 34 42.99 +11 49 07.5 V 270
2023-06-16 23:36:25 v 1 007.40000 +50.52000 270
2023-06-17 20:19:12 C 12 35 35.18 +11 37 37.2 X G02
2023-06-17 20:23:17 C 12 35 35.35 +11 37 34.9 X G02
2023-06-17 20:27:20 C 12 35 35.51 +11 37 32.6 X G02
2023-06-17 21:02:42 C 12 35 36.925 +11 37 14.09 V L92
2023-06-17 21:07:48 C 12 35 37.146 +11 37 11.67 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)