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
2012-03-15 03:55:20 C 06 26 58.65 +20 43 54.6 c 704
2012-03-15 04:11:09 C 06 26 58.92 +20 43 56.0 c 704
2012-03-15 04:27:06 C 06 26 59.23 +20 43 58.2 c 704
2012-03-15 04:43:02 C 06 26 59.53 +20 43 59.5 c 704
2012-03-15 04:59:10 C 06 26 59.84 +20 44 01.4 c 704
2012-03-15 22:10:19 C 06 27 19.70 +20 45 46.9 c A24
2012-03-15 22:11:21 C 06 27 19.70 +20 45 47.0 c A24
2012-03-16 04:18:03 C 06 27 26.89 +20 46 24.8 c 704
2012-03-16 04:34:10 C 06 27 27.18 +20 46 27.1 c 704
2012-03-16 04:49:58 C 06 27 27.50 +20 46 27.7 c 704
2012-03-16 05:05:46 C 06 27 27.76 +20 46 28.8 c 704
2012-03-20 21:14:49 C 06 29 57.30 +20 57 17.3 u C47
2012-03-20 21:20:09 C 06 29 57.43 +20 57 18.8 u C47
2012-03-21 19:13:53 C 06 30 30.30 +20 59 17.9 c A24
2012-03-21 19:14:56 C 06 30 30.33 +20 59 18.0 c A24
2012-03-21 21:56:51 C 06 30 34.33 +20 59 32.0 c A24
2012-03-21 21:57:54 C 06 30 34.36 +20 59 32.0 c A24
2012-03-23 20:57:47 C 06 31 48.88 +21 03 36.1 c A24
2012-03-23 20:58:50 C 06 31 48.94 +21 03 36.6 c A24
2012-03-24 03:57:35 C 06 32 00.43 +21 04 12.2 c 704
2012-03-24 04:12:57 C 06 32 00.83 +21 04 14.1 c 704
2012-03-24 04:28:25 C 06 32 01.24 +21 04 15.0 c 704
2012-03-24 04:43:45 C 06 32 01.62 +21 04 16.3 c 704
2012-03-24 04:59:04 C 06 32 02.04 +21 04 18.4 c 704
2012-04-09 05:43:54 C 06 45 12.334 +21 29 00.37 L F51
2012-04-09 05:59:54 C 06 45 12.961 +21 29 00.96 L F51
2012-04-10 18:54:45 C 06 46 43.10 +21 30 33.1 u C73
2012-04-10 18:58:14 C 06 46 43.28 +21 30 33.0 u C73
2012-04-10 19:05:11 C 06 46 43.55 +21 30 33.4 u C73
2012-04-10 19:14:26 C 06 46 43.86 +21 30 33.7 u C73
2012-05-01 03:14:23 C 07 09 43.56 +21 36 35.1 r 703
2012-05-01 03:23:20 C 07 09 43.95 +21 36 34.4 r 703
2012-05-01 03:32:34 C 07 09 44.49 +21 36 33.6 r 703
2012-05-01 03:41:45 C 07 09 44.96 +21 36 34.8 r 703
2012-05-01 03:50:57 C 07 09 45.43 +21 36 34.1 r 703
2013-01-13 12:40:19 C 14 30 31.10 -07 33 54.0 r 703
2013-01-13 12:50:16 C 14 30 31.93 -07 33 56.2 r 703
2013-01-13 13:00:20 C 14 30 32.79 -07 33 59.1 r 703
2013-01-13 13:10:22 C 14 30 33.66 -07 34 01.7 r 703
2013-01-17 14:55:14 C 14 39 07.616 -07 57 33.98 L F51
2013-01-17 15:03:03 C 14 39 08.293 -07 57 35.78 L F51
2013-01-17 15:10:48 C 14 39 08.969 -07 57 37.60 L F51
2013-01-17 15:18:34 C 14 39 09.642 -07 57 39.43 L F51
2013-01-19 02:49:30 C 14 42 17.75 -08 05 48.5 o C41
2013-01-19 03:28:04 C 14 42 21.11 -08 05 57.4 o C41
2013-02-14 12:29:26 C 15 40 38.85 -09 44 19.4 r 703
2013-02-14 12:34:50 C 15 40 39.36 -09 44 19.7 r 703
2013-02-14 12:40:24 C 15 40 39.86 -09 44 20.4 r 703
2013-02-14 12:45:48 C 15 40 40.40 -09 44 20.6 r 703
2013-02-15 15:23:46 C 15 43 14.075 -09 46 16.17 L F51
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)