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
2023-06-27 20:16:55 C 12 47 40.070 +09 09 44.38 V L92
2023-06-27 20:22:01 C 12 47 40.393 +09 09 40.66 V L92
2023-06-27 20:27:07 C 12 47 40.641 +09 09 37.69 V L92
2023-06-27 20:32:12 C 12 47 40.912 +09 09 33.08 V L92
2023-06-28 01:01:52 C 12 47 56.724 +09 06 45.36 V W68
2023-06-28 01:05:49 C 12 47 56.933 +09 06 42.62 V W68
2023-06-28 01:12:54 C 12 47 57.334 +09 06 37.91 V W68
2023-06-28 01:32:06 C 12 47 58.406 +09 06 25.06 V W68
2023-06-28 04:06:25 C 12 48 07.39 +09 04 28.9 q 463
2023-06-28 04:24:23 C 12 48 08.43 +09 04 17.0 q 463
2023-06-28 19:45:28 C 12 49 02.626 +08 53 55.08 V L92
2023-06-28 19:54:38 C 12 49 03.136 +08 53 48.17 V L92
2023-06-28 20:04:50 C 12 49 03.733 +08 53 41.93 V L92
2023-06-28 20:15:01 C 12 49 04.300 +08 53 35.13 V L92
2023-06-28 20:25:13 C 12 49 04.880 +08 53 28.19 V L92
2023-07-01 00:48:01 C 12 52 16.231 +08 17 32.86 V W68
2023-07-01 00:51:55 C 12 52 16.466 +08 17 30.16 V W68
2023-07-01 01:00:47 C 12 52 17.002 +08 17 23.96 V W68
2023-07-01 01:21:06 C 12 52 18.221 +08 17 09.64 V W68
2023-07-01 04:11:19 C 12 52 28.834 +08 14 59.35 V G96
2023-07-01 04:17:33 C 12 52 29.212 +08 14 55.07 V G96
2023-07-01 04:23:47 C 12 52 29.590 +08 14 50.64 V G96
2023-07-01 04:30:02 C 12 52 29.975 +08 14 46.14 V G96
2023-07-02 04:24:54 C 12 54 00.81 +07 57 51.0 q 463
2023-07-02 04:33:06 C 12 54 01.32 +07 57 45.4 q 463
2023-07-02 04:45:45 C 12 54 02.07 +07 57 36.2 q 463
2023-07-02 18:24:21 C 12 54 54.948 +07 48 04.36 V M22
2023-07-02 18:28:20 C 12 54 55.198 +07 48 01.62 V M22
2023-07-02 18:36:53 C 12 54 55.730 +07 47 55.39 V M22
2023-07-02 18:52:55 C 12 54 56.734 +07 47 43.87 V M22
2023-07-04 00:14:04 C 12 56 52.392 +07 26 30.88 V W68
2023-07-04 00:17:58 C 12 56 52.642 +07 26 27.96 V W68
2023-07-04 00:40:51 C 12 56 54.106 +07 26 11.22 V W68
2023-07-04 00:48:01 C 12 56 54.562 +07 26 06.04 V W68
2023-07-05 18:14:03 C 12 59 42.806 +06 55 34.64 V M22
2023-07-05 18:26:31 C 12 59 43.630 +06 55 25.39 V M22
2023-07-05 18:47:02 C 12 59 44.995 +06 55 09.98 V M22
2023-07-07 19:39:20 C 13 03 10.832 +06 18 05.85 V L92
2023-07-07 19:48:35 C 13 03 11.411 +06 17 58.83 V L92
2023-07-07 20:58:50 C 13 03 16.390 +06 17 05.65 V L92
2023-07-08 19:54:09 C 13 04 55.818 +05 59 27.90 V L92
2023-07-08 19:59:40 C 13 04 56.166 +05 59 23.83 V L92
2023-07-08 20:05:00 C 13 04 56.544 +05 59 19.71 V L92
2023-07-08 20:10:24 C 13 04 56.921 +05 59 15.71 V L92
2023-07-08 20:15:33 C 13 04 57.308 +05 59 11.75 V L92
2023-07-08 20:20:42 C 13 04 57.668 +05 59 07.50 V L92
2023-07-10 04:37:25 C 13 07 20.724 +05 33 59.00 Z U76
2023-07-10 04:46:24 C 13 07 21.377 +05 33 51.98 Z U76
2023-07-10 04:54:46 C 13 07 21.989 +05 33 45.22 Z U76
2023-07-10 08:32:30 C 13 07 38.671 +05 31 05.95 q Q58
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)