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
2025-03-20 18:04:56 C 08 00 54.27 +21 35 20.8 X G02
2025-03-20 18:13:50 C 08 00 54.23 +21 35 21.6 X G02
2025-03-20 18:22:29 C 08 00 54.18 +21 35 22.3 X G02
2025-03-21 08:02:37 C 08 00 50.930 +21 36 38.12 V T08
2025-03-21 08:07:17 C 08 00 50.923 +21 36 38.45 V T08
2025-03-21 08:17:18 C 08 00 50.868 +21 36 39.49 V T08
2025-03-21 08:36:47 C 08 00 50.784 +21 36 40.86 V T08
2025-03-22 07:21:01 C 08 00 47.191 +21 38 38.51 V T08
2025-03-22 07:25:37 C 08 00 47.167 +21 38 38.98 V T08
2025-03-22 07:33:10 C 08 00 47.146 +21 38 39.55 V T08
2025-03-22 07:47:47 C 08 00 47.093 +21 38 40.81 V T08
2025-03-23 07:39:56 C 08 00 45.108 +21 40 37.02 V T05
2025-03-23 07:45:14 C 08 00 45.101 +21 40 37.45 V T05
2025-03-23 07:54:45 C 08 00 45.089 +21 40 38.03 V T05
2025-03-23 08:14:06 C 08 00 45.041 +21 40 39.58 V T05
2025-03-24 07:35:22 C 08 00 45.007 +21 42 26.89 V T05
2025-03-24 07:40:40 C 08 00 45.010 +21 42 27.11 V T05
2025-03-24 07:49:16 C 08 00 44.998 +21 42 27.86 V T05
2025-03-24 08:03:48 C 08 00 45.000 +21 42 28.87 V T05
2025-03-25 07:35:51 C 08 00 46.771 +21 44 10.18 V T08
2025-03-25 07:40:35 C 08 00 46.781 +21 44 10.36 V T08
2025-03-25 07:49:27 C 08 00 46.786 +21 44 11.00 V T08
2025-03-25 08:23:01 C 08 00 46.800 +21 44 13.24 V T08
2025-03-26 07:22:32 C 08 00 50.407 +21 45 45.65 V T05
2025-03-26 07:29:56 C 08 00 50.407 +21 45 46.30 V T05
2025-03-26 07:37:01 C 08 00 50.431 +21 45 46.44 V T05
2025-03-26 18:14:42 C 08 00 52.76 +21 46 25.2 X G02
2025-03-26 18:32:15 C 08 00 52.81 +21 46 26.2 X G02
2025-03-26 21:41:49 C 08 00 53.405 +21 46 37.88 Z C23
2025-03-26 22:32:28 C 08 00 53.592 +21 46 40.66 Z C23
2025-03-26 23:08:51 C 08 00 53.731 +21 46 42.67 Z C23
2025-03-27 10:21:39 C 08 00 56.530 +21 47 25.40 V T05
2025-03-27 10:26:14 C 08 00 56.549 +21 47 25.69 V T05
2025-03-27 10:33:37 C 08 00 56.597 +21 47 26.12 V T05
2025-03-27 10:48:12 C 08 00 56.645 +21 47 26.95 V T05
2025-03-27 21:17:24 C 08 00 59.911 +21 48 02.45 Z C23
2025-03-27 21:47:53 C 08 01 00.062 +21 48 03.82 Z C23
2025-03-27 22:27:19 C 08 01 00.245 +21 48 05.98 Z C23
2025-03-28 07:31:36 C 08 01 03.269 +21 48 39.17 V T05
2025-03-28 07:37:00 C 08 01 03.293 +21 48 39.28 V T05
2025-03-28 07:44:55 C 08 01 03.329 +21 48 39.64 V T05
2025-03-28 07:59:36 C 08 01 03.396 +21 48 40.61 V T05
2025-03-29 06:41:38 C 08 01 12.142 +21 49 53.18 V T08
2025-03-29 06:46:30 C 08 01 12.166 +21 49 53.33 V T08
2025-03-29 06:47:59 C 08 01 12.178 +21 49 53.29 V T05
2025-03-29 06:55:21 C 08 01 12.216 +21 49 53.76 V T05
2025-03-29 21:30:37 C 08 01 18.622 +21 50 34.76 Z C23
2025-03-29 21:41:07 C 08 01 18.660 +21 50 34.76 Z C23
2025-03-29 21:58:50 C 08 01 18.823 +21 50 36.24 Z C23
2025-03-30 06:28:12 C 08 01 22.966 +21 51 02.59 V T05
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)