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
2016-12-31 00:10:16 C 06 31 50.42 +15 13 18.5 16.2 v K63
2017-01-01 00:55:47 C 06 30 24.77 +15 17 24.3 q 160
2017-01-01 00:57:44 C 06 30 24.66 +15 17 24.6 q 160
2017-01-01 00:59:42 C 06 30 24.55 +15 17 24.8 q 160
2017-01-03 10:34:13 C 06 27 07.63 +15 27 08.3 L T05
2017-01-03 11:01:24 C 06 27 06.04 +15 27 12.9 L T05
2017-01-03 11:23:28 C 06 27 04.77 +15 27 16.7 L T05
2017-01-03 12:08:08 C 06 27 02.18 +15 27 24.1 L T05
2017-01-04 00:23:58 C 06 26 20.78 +15 29 27.4 q 160
2017-01-04 00:25:59 C 06 26 20.65 +15 29 27.9 q 160
2017-01-04 00:28:02 C 06 26 20.55 +15 29 28.1 q 160
2017-01-04 10:05:21 C 06 25 48.22 +15 31 09.1 L T05
2017-01-04 10:11:04 C 06 25 47.89 +15 31 10.1 L T05
2017-01-04 10:44:14 C 06 25 45.99 +15 31 15.7 L T05
2017-01-04 11:07:32 C 06 25 44.65 +15 31 20.0 L T05
2017-01-05 00:42:34 C 06 24 59.09 +15 33 37.3 q 160
2017-01-05 00:44:40 C 06 24 58.97 +15 33 37.6 q 160
2017-01-05 00:46:45 C 06 24 58.85 +15 33 37.9 q 160
2017-01-05 01:00:21 C 06 24 58.11 +15 33 41.5 q Z45
2017-01-05 01:20:21 C 06 24 56.99 +15 33 44.8 q Z45
2017-01-05 01:36:02 C 06 24 56.05 +15 33 47.6 q Z45
2017-01-05 02:13:18 C 06 24 54.45 +15 33 53.8 R G45
2017-01-05 02:20:16 C 06 24 54.10 +15 33 55.0 R G45
2017-01-05 02:27:10 C 06 24 53.68 +15 33 56.2 R G45
2017-01-05 02:46:23 C 06 24 52.58 +15 33 59.3 R G45
2017-01-05 21:11:31 C 06 23 51.25 +15 37 10.7 q Z45
2017-01-05 21:58:03 C 06 23 48.61 +15 37 18.7 q Z45
2017-01-05 22:30:00 C 06 23 46.81 +15 37 24.3 q Z45
2017-01-06 23:28:54 C 06 22 24.40 +15 41 43.9 q 160
2017-01-06 23:31:15 C 06 22 24.29 +15 41 44.9 q 160
2017-01-06 23:33:34 C 06 22 24.15 +15 41 45.0 q 160
2017-01-08 02:32:20 C 06 20 56.74 +15 46 29.9 q W34
2017-01-08 02:40:05 C 06 20 56.39 +15 46 31.6 q W34
2017-01-08 02:50:29 C 06 20 55.72 +15 46 33.4 q W34
2017-01-08 03:00:08 C 06 20 55.26 +15 46 35.0 q W34
2017-01-08 03:04:17 C 06 20 55.05 +15 46 35.1 q W34
2017-01-08 09:10:13 C 06 20 35.32 +15 47 40.3 L T05
2017-01-08 09:40:52 C 06 20 33.63 +15 47 45.7 L T05
2017-01-08 09:48:41 C 06 20 33.19 +15 47 47.2 L T05
2017-01-08 10:10:36 C 06 20 32.00 +15 47 51.0 L T05
2017-01-09 22:53:08 C 06 18 35.53 +15 54 17.7 q 160
2017-01-09 22:55:13 C 06 18 35.42 +15 54 18.1 q 160
2017-01-09 22:57:17 C 06 18 35.31 +15 54 18.4 q 160
2017-01-16 08:53:57 C 06 11 00.14 +16 21 51.7 L T05
2017-01-16 09:20:53 C 06 10 58.85 +16 21 56.5 L T05
2017-01-16 09:52:43 C 06 10 57.33 +16 22 02.1 L T05
2017-01-16 10:01:12 C 06 10 56.93 +16 22 03.8 L T05
2017-01-19 20:36:23 C 06 07 19.26 +16 36 53.2 16.1 c K63
2017-01-19 20:59:21 C 06 07 18.32 +16 36 57.2 15.8 c K63
2017-01-19 21:23:04 C 06 07 17.19 +16 37 02.5 15.6 c K63
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)