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
2010-05-04 05:39:57 C 09 42 37.00 +20 13 03.6 r 703
2010-05-04 05:47:30 C 09 42 37.18 +20 13 02.4 r 703
2010-05-05 22:36:43 C 09 43 38.44 +20 07 44.7 16.2 o 084
2010-05-05 22:39:54 C 09 43 38.54 +20 07 44.8 16.1 o 084
2010-05-06 19:26:45 S 09 44 11.81 +20 04 57.2 L C51
2010-05-06 21:01:46 C 09 44 14.06 +20 04 40.3 16.6 u 084
2010-05-06 21:04:55 C 09 44 14.20 +20 04 40.1 16.0 u 084
2010-05-06 22:37:16 S 09 44 16.94 +20 04 30.3 L C51
2010-05-07 01:47:47 S 09 44 22.12 +20 04 03.4 L C51
2010-05-07 04:58:18 S 09 44 27.31 +20 03 36.5 L C51
2010-05-07 06:33:39 S 09 44 29.93 +20 03 22.6 L C51
2010-05-07 08:08:50 S 09 44 32.54 +20 03 09.3 L C51
2010-05-07 09:44:11 S 09 44 35.18 +20 02 55.5 L C51
2010-05-07 11:19:21 S 09 44 37.80 +20 02 42.1 L C51
2010-05-07 12:54:42 S 09 44 40.43 +20 02 28.1 L C51
2010-05-07 16:05:13 S 09 44 45.73 +20 02 00.6 L C51
2010-05-07 19:15:44 S 09 44 51.07 +20 01 32.8 L C51
2010-05-07 22:26:15 S 09 44 56.42 +20 01 04.9 L C51
2010-05-08 01:36:46 S 09 45 01.80 +20 00 37.1 L C51
2010-05-08 03:37:20 C 09 45 04.92 +20 00 19.5 c 704
2010-05-08 03:51:49 C 09 45 05.40 +20 00 17.5 c 704
2010-05-08 04:06:44 C 09 45 05.80 +20 00 15.2 c 704
2010-05-08 04:21:00 C 09 45 06.19 +20 00 12.9 c 704
2010-05-08 04:35:17 C 09 45 06.55 +20 00 09.5 c 704
2010-05-09 03:38:12 C 09 45 46.69 +19 56 42.1 c 704
2010-05-09 03:52:21 C 09 45 47.15 +19 56 39.3 c 704
2010-05-09 04:06:25 C 09 45 47.54 +19 56 36.5 c 704
2010-05-09 04:20:39 C 09 45 47.95 +19 56 35.3 c 704
2010-05-09 04:34:45 C 09 45 48.42 +19 56 32.2 c 704
2010-05-10 02:15:25 C 09 46 27.43 +19 53 07.2 r I13
2010-05-10 03:20:33 C 09 46 29.39 +19 52 57.2 r I13
2010-05-11 01:55:47 C 09 47 11.56 +19 49 15.7 r I13
2010-05-11 02:59:50 C 09 47 13.50 +19 49 05.8 r I13
2010-05-13 04:56:13 C 09 48 51.40 +19 40 29.8 r 703
2010-05-13 05:06:06 C 09 48 51.76 +19 40 28.0 r 703
2010-05-13 05:16:03 C 09 48 52.12 +19 40 26.2 r 703
2010-05-13 05:26:02 C 09 48 52.45 +19 40 24.6 r 703
2010-05-13 05:53:02 C 09 48 53.537 +19 40 21.30 L F51
2010-05-13 06:10:16 C 09 48 54.107 +19 40 18.10 L F51
2010-05-13 20:35:55 C 09 49 23.58 +19 37 39.3 16.1 u 084
2010-05-14 03:36:12 C 09 49 38.21 +19 36 24.6 c 704
2010-05-14 03:50:17 C 09 49 38.67 +19 36 21.8 c 704
2010-05-14 04:04:35 C 09 49 39.17 +19 36 20.1 c 704
2010-05-14 04:18:49 C 09 49 39.66 +19 36 16.0 c 704
2010-05-14 04:33:04 C 09 49 40.15 +19 36 13.5 c 704
2010-05-14 21:25:38 C 09 50 15.65 +19 33 02.9 16.6 u 084
2010-05-31 21:28:58 C 10 07 51.54 +17 57 35.8 u B38
2010-05-31 21:33:01 C 10 07 51.74 +17 57 34.7 u B38
2010-05-31 21:39:46 C 10 07 52.05 +17 57 33.6 u B38
2010-06-05 20:19:04 C 10 14 01.25 +17 23 08.4 u B38
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)