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
2018-07-02 21:01:32 C 14 42 06.47 +08 01 37.8 q C95
2018-07-02 21:02:45 C 14 42 06.51 +08 01 36.6 q C95
2018-07-03 06:02:20 C 14 42 25.87 +07 52 35.8 U 703
2018-07-03 06:10:02 C 14 42 26.12 +07 52 28.0 U 703
2018-07-03 06:14:47 C 14 42 27.38 +07 52 29.3 U T04
2018-07-03 06:17:42 C 14 42 26.36 +07 52 19.8 U 703
2018-07-03 06:25:24 C 14 42 26.62 +07 52 12.1 U 703
2018-07-03 06:32:45 C 14 42 27.93 +07 52 10.6 U T04
2018-07-03 06:50:43 C 14 42 28.46 +07 51 52.5 U T04
2018-07-03 07:10:37 C 14 42 29.05 +07 51 31.8 U T04
2018-07-03 07:28:41 C 14 42 29.60 +07 51 14.4 U T04
2018-07-03 07:46:53 C 14 42 30.17 +07 50 55.8 U T04
2018-07-03 08:04:52 C 14 42 30.72 +07 50 36.9 U T04
2018-07-04 21:01:59 C 14 43 58.60 +07 11 58.3 U G34
2018-07-04 21:06:11 C 14 43 58.76 +07 11 53.9 U G34
2018-07-04 21:10:23 C 14 43 58.92 +07 11 49.3 U G34
2018-07-04 21:14:35 C 14 43 59.07 +07 11 45.0 U G34
2018-07-04 21:16:19 C 14 43 59.11 +07 11 45.6 U 108
2018-07-04 21:17:28 C 14 43 59.14 +07 11 44.3 U 108
2018-07-04 21:18:37 C 14 43 59.14 +07 11 43.1 U 108
2018-07-05 21:14:57 C 14 45 01.23 +06 45 52.7 q C23
2018-07-05 21:18:38 C 14 45 01.37 +06 45 48.7 q C23
2018-07-05 21:21:48 C 14 45 01.49 +06 45 45.2 q C23
2018-07-06 03:54:57 C 14 45 19.41 +06 38 38.9 U V04
2018-07-06 03:56:11 C 14 45 19.46 +06 38 37.7 U V04
2018-07-06 03:57:23 C 14 45 19.50 +06 38 36.6 U V04
2018-07-06 03:58:38 C 14 45 19.55 +06 38 35.2 U V04
2018-07-06 21:00:42 C 14 46 06.45 +06 19 34.7 12.7 U K46
2018-07-06 21:17:13 C 14 46 07.16 +06 19 16.1 13.0 U K46
2018-07-06 21:31:41 C 14 46 07.78 +06 18 59.8 13.3 U K46
2018-07-06 22:28:12 C 14 46 10.24 +06 17 56.0 12.0 U K46
2018-07-06 23:38:48 S 14 46 14.59 +06 16 55.5 L C51
2018-07-07 02:34:46 C 14 46 22.52 +06 13 21.9 q W19
2018-07-07 02:36:48 C 14 46 22.61 +06 13 19.5 q W19
2018-07-07 02:38:49 C 14 46 22.68 +06 13 17.3 q W19
2018-07-07 02:40:58 C 14 46 22.77 +06 13 14.7 q W19
2018-07-07 02:43:41 C 14 46 22.89 +06 13 11.7 q W19
2018-07-07 02:46:33 S 14 46 23.52 +06 13 25.3 L C51
2018-07-07 05:55:37 S 14 46 32.62 +06 09 50.5 L C51
2018-07-07 09:04:07 S 14 46 41.72 +06 06 16.6 L C51
2018-07-07 12:11:52 S 14 46 50.85 +06 02 44.3 L C51
2018-07-07 15:20:56 S 14 47 00.15 +05 59 07.4 L C51
2018-07-07 15:21:07 S 14 47 00.17 +05 59 06.7 L C51
2018-07-07 18:29:26 S 14 47 09.47 +05 55 31.3 L C51
2018-07-07 20:03:40 S 14 47 14.16 +05 53 43.0 L C51
2018-07-07 21:37:07 C 14 47 18.13 +05 51 36.5 q C23
2018-07-07 21:37:55 S 14 47 18.88 +05 51 54.5 L C51
2018-07-07 21:40:34 C 14 47 18.29 +05 51 32.5 q C23
2018-07-07 21:43:18 C 14 47 18.43 +05 51 29.3 q C23
2018-07-07 23:12:11 S 14 47 23.60 +05 50 05.6 L C51
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)