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
2025-04-26 08:11:30 C 08 16 16.661 +21 44 31.67 V T08
2025-04-26 08:15:33 C 08 16 16.771 +21 44 31.09 V T08
2025-04-26 08:23:33 C 08 16 17.071 +21 44 30.80 V T08
2025-04-26 08:52:13 C 08 16 18.101 +21 44 28.54 V T08
2025-04-26 11:54:25 B 08 16 24.679 +21 44 16.44 X 900
2025-04-26 12:09:34 B 08 16 25.217 +21 44 15.29 X 900
2025-04-26 21:17:33 C 08 16 44.988 +21 43 39.54 Z C23
2025-04-26 21:57:02 C 08 16 46.370 +21 43 36.73 Z C23
2025-04-27 06:29:52 C 08 17 05.045 +21 43 04.91 V T08
2025-04-27 06:35:18 C 08 17 05.232 +21 43 04.66 V T08
2025-04-27 06:43:15 C 08 17 05.508 +21 43 04.12 V T08
2025-04-27 06:59:55 C 08 17 06.091 +21 43 02.96 V T08
2025-04-27 20:50:23 C 08 17 36.660 +21 42 06.23 V R17
2025-04-27 21:10:54 C 08 17 37.392 +21 42 04.61 V R17
2025-04-27 21:31:26 C 08 17 38.146 +21 42 03.17 V R17
2025-04-27 21:51:58 C 08 17 38.885 +21 42 01.80 V R17
2025-04-28 06:40:18 C 08 17 58.495 +21 41 25.37 V T05
2025-04-28 06:45:41 C 08 17 58.716 +21 41 25.08 V T05
2025-04-28 07:02:15 C 08 17 59.318 +21 41 23.75 V T05
2025-04-28 07:10:11 C 08 17 59.616 +21 41 23.21 V T05
2025-04-28 18:34:39 C 08 18 25.35 +21 40 31.2 X D04
2025-04-28 18:45:04 C 08 18 25.70 +21 40 30.7 X D04
2025-04-29 20:31:33 B 08 19 24.598 +21 38 36.89 q Y84
2025-04-29 20:39:12 B 08 19 24.893 +21 38 36.10 q Y84
2025-04-29 20:46:03 B 08 19 25.166 +21 38 35.66 q Y84
2025-04-29 20:52:09 C 08 19 25.406 +21 38 35.12 Z C23
2025-04-29 21:01:47 B 08 19 25.766 +21 38 34.40 q Y84
2025-04-29 21:11:28 B 08 19 26.143 +21 38 34.19 q Y84
2025-04-29 21:20:26 B 08 19 26.486 +21 38 33.11 q Y84
2025-04-29 21:41:53 C 08 19 27.286 +21 38 30.95 Z C23
2025-04-29 22:18:10 C 08 19 28.675 +21 38 28.90 Z C23
2025-05-01 06:05:05 C 08 20 43.174 +21 35 59.93 V T08
2025-05-01 06:09:42 C 08 20 43.356 +21 35 59.35 V T08
2025-05-01 06:17:06 C 08 20 43.630 +21 35 58.92 V T08
2025-05-01 06:52:30 C 08 20 44.990 +21 35 55.64 V T08
2025-05-02 05:48:33 C 08 21 40.008 +21 34 00.80 V T05
2025-05-02 05:53:07 C 08 21 40.181 +21 34 00.37 V T05
2025-05-02 06:04:20 C 08 21 40.622 +21 33 59.47 V T05
2025-05-02 06:23:01 C 08 21 41.362 +21 33 57.92 V T05
2025-05-04 20:27:18 C 08 24 14.866 +21 28 19.78 Z C23
2025-05-04 21:09:49 C 08 24 16.678 +21 28 15.96 Z C23
2025-05-04 21:36:37 C 08 24 17.818 +21 28 13.51 Z C23
2025-05-06 20:56:41 C 08 26 19.414 +21 23 35.02 V R17
2025-05-06 21:17:48 C 08 26 20.335 +21 23 33.00 V R17
2025-05-06 21:38:57 C 08 26 21.254 +21 23 30.26 V R17
2025-05-06 22:00:42 C 08 26 22.176 +21 23 28.43 V R17
2025-05-08 06:11:34 C 08 27 47.081 +21 20 06.83 V T08
2025-05-08 06:16:17 C 08 27 47.297 +21 20 06.29 V T08
2025-05-08 06:24:17 C 08 27 47.657 +21 20 05.24 V T08
2025-05-08 06:43:39 C 08 27 48.497 +21 20 03.12 V T08
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)