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
2023-03-17 10:21:15 C 13 27 12.78 +05 47 21.4 V U55
2023-03-17 10:33:05 C 13 27 12.46 +05 47 28.4 V U55
2023-03-17 10:44:58 C 13 27 12.13 +05 47 35.5 V U55
2023-03-17 11:19:39 C 13 27 11.479 +05 48 00.25 V T05
2023-03-17 11:22:17 C 13 27 11.407 +05 48 01.76 V T05
2023-03-17 11:26:50 C 13 27 11.278 +05 48 04.57 V T05
2023-03-17 11:36:37 C 13 27 11.004 +05 48 10.40 V T05
2023-03-17 17:33:45 C 13 27 01.841 +05 51 50.90 V P07
2023-03-17 18:50:46 C 13 26 59.664 +05 52 37.09 V P07
2023-03-17 18:53:04 C 13 26 59.594 +05 52 38.32 V P07
2023-03-17 20:07:21 C 13 26 57.478 +05 53 22.92 V P07
2023-03-17 21:34:38 C 13 26 55.030 +05 54 14.80 V P07
2023-03-17 22:13:36 C 13 26 54.797 +05 54 28.30 q M16
2023-03-17 22:25:11 C 13 26 54.470 +05 54 35.24 q M16
2023-03-17 22:36:44 C 13 26 54.151 +05 54 42.30 q M16
2023-03-17 23:22:04 C 13 26 52.81 +05 55 08.9 V M34
2023-03-17 23:48:14 C 13 26 52.08 +05 55 24.6 V M34
2023-03-18 00:10:14 C 13 26 51.46 +05 55 37.9 V M34
2023-03-18 00:11:25 C 13 26 51.499 +05 55 39.25 q M16
2023-03-18 00:22:58 C 13 26 51.173 +05 55 46.27 q M16
2023-03-18 00:34:31 C 13 26 50.846 +05 55 53.18 q M16
2023-03-18 01:49:39 C 13 26 48.590 +05 56 50.03 V M22
2023-03-18 01:54:58 C 13 26 48.434 +05 56 53.20 V M22
2023-03-18 02:45:33 C 13 26 46.997 +05 57 23.65 V M22
2023-03-18 03:26:30 C 13 26 45.833 +05 57 48.17 V M22
2023-03-18 12:54:34 C 13 26 30.852 +06 03 23.33 V T05
2023-03-18 13:01:36 C 13 26 30.641 +06 03 27.61 V T05
2023-03-18 13:35:18 C 13 26 29.638 +06 03 47.95 V T05
2023-03-18 13:46:07 C 13 26 29.316 +06 03 54.50 V T05
2023-03-18 21:26:46 C 13 26 17.300 +06 08 32.03 V L92
2023-03-18 21:31:28 C 13 26 17.195 +06 08 34.95 V L92
2023-03-18 21:36:40 C 13 26 17.063 +06 08 38.49 V L92
2023-03-18 21:41:51 C 13 26 16.876 +06 08 41.33 V L92
2023-03-18 21:47:02 C 13 26 16.728 +06 08 44.43 V L92
2023-03-18 21:52:13 C 13 26 16.581 +06 08 47.28 V L92
2023-03-18 21:57:25 C 13 26 16.359 +06 08 50.07 V L92
2023-03-19 01:16:00 B 13 26 10.47 +06 10 49.6 V L65
2023-03-19 01:20:03 B 13 26 10.35 +06 10 52.1 V L65
2023-03-19 01:28:11 B 13 26 10.13 +06 10 57.0 V L65
2023-03-19 05:50:27 C 13 26 02.851 +06 13 50.12 V W68
2023-03-19 05:54:59 C 13 26 02.712 +06 13 52.97 V W68
2023-03-19 05:59:33 C 13 26 02.568 +06 13 55.67 V W68
2023-03-19 06:07:21 C 13 26 02.330 +06 14 00.60 V W68
2023-03-19 16:44:43 C 13 25 44.206 +06 20 30.19 V P07
2023-03-19 18:35:05 C 13 25 40.706 +06 21 38.59 V P07
2023-03-19 18:38:36 C 13 25 40.577 +06 21 40.50 V P07
2023-03-19 19:47:45 C 13 25 38.398 +06 22 23.16 V P07
2023-03-19 19:50:19 C 13 25 38.311 +06 22 24.71 V P07
2023-03-21 12:21:38 C 13 24 24.000 +06 47 31.49 V T05
2023-03-21 12:26:21 C 13 24 23.837 +06 47 34.48 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)