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
2000-05-13 22:51:15 C 11 03 56.11 +17 47 42.3 c 613
2000-05-14 21:04:54 C 11 04 15.48 +17 43 30.7 c 613
2000-05-14 21:32:08 C 11 04 15.87 +17 43 25.9 c 613
2000-05-14 21:55:20 C 11 04 16.19 +17 43 21.4 c 613
2000-05-14 22:16:28 C 11 04 16.48 +17 43 16.8 c 613
2000-05-14 22:30:44 C 11 04 16.74 +17 43 14.0 c 613
2000-05-14 22:50:45 C 11 04 17.02 +17 43 10.5 c 613
2000-05-14 23:06:18 C 11 04 17.26 +17 43 06.8 c 613
2000-05-14 23:28:18 C 11 04 17.58 +17 43 02.5 c 613
2000-05-14 23:48:16 C 11 04 17.85 +17 42 59.0 c 613
2000-05-15 00:14:17 C 11 04 18.25 +17 42 53.9 c 613
2000-05-15 00:34:16 C 11 04 18.67 +17 42 50.2 c 613
2000-05-15 02:35:30 C 11 04 20.65 +17 42 28.0 i 849
2000-05-15 02:42:00 C 11 04 20.76 +17 42 26.7 i 849
2000-05-15 03:05:43 C 11 04 21.08 +17 42 22.1 i 849
2000-05-19 04:53:17 C 11 06 10.49 +17 21 15.3 670
2000-05-19 05:36:28 C 11 06 11.35 +17 21 05.2 670
2000-05-19 20:50:33 C 11 06 31.67 +17 17 24.0 c 118
2000-05-19 21:03:06 C 11 06 31.95 +17 17 21.0 c 118
2000-05-23 20:50:20 C 11 08 58.44 +16 52 19.7 z 151
2000-05-23 20:53:40 C 11 08 58.56 +16 52 19.8 z 151
2000-05-23 20:57:03 C 11 08 58.67 +16 52 18.1 z 151
2000-05-23 21:00:50 C 11 08 58.79 +16 52 17.2 z 151
2000-06-03 05:49:28 C 11 17 43.49 +15 31 36.3 z 642
2000-06-03 06:00:19 C 11 17 43.92 +15 31 32.2 z 642
2000-06-03 06:06:38 C 11 17 44.20 +15 31 29.5 z 642
2000-08-22 02:08:55 C 13 48 51.56 -04 16 37.5 i 739
2000-08-22 02:11:18 C 13 48 51.86 -04 16 39.5 i 739
2000-08-22 02:13:00 C 13 48 51.97 -04 16 42.5 i 739
2000-08-22 02:17:12 C 13 48 52.45 -04 16 45.0 i 739
2000-10-22 08:03:38 C 17 22 36.19 -22 15 28.8 16.4 c 467
2000-10-22 08:09:54 C 17 22 37.21 -22 15 40.0 15.9 c 467
2001-09-26 10:55:02 C 08 03 26.46 +15 56 30.0 c 699
2001-09-26 11:15:27 C 08 03 27.49 +15 56 27.8 c 699
2001-09-26 11:35:53 C 08 03 28.53 +15 56 23.9 c 699
2001-09-26 11:56:22 C 08 03 29.59 +15 56 20.7 c 699
2001-10-19 11:07:24 C 08 28 16.35 +14 35 51.0 c 699
2001-10-19 11:30:01 C 08 28 17.17 +14 35 48.1 c 699
2001-10-19 11:52:40 C 08 28 18.02 +14 35 45.0 c 699
2001-10-19 12:15:22 C 08 28 18.86 +14 35 42.2 c 699
2001-11-17 12:26:18 C 08 46 02.205 +13 30 37.49 g 689
2001-11-18 12:22:54 C 08 46 18.038 +13 29 45.40 g 689
2001-12-09 10:59:27 C 08 45 18.661 +13 41 34.79 g 689
2001-12-11 10:51:17 C 08 44 31.34 +13 46 02.7 17.6 c 704
2001-12-11 11:14:46 C 08 44 30.66 +13 46 06.5 18.6 c 704
2001-12-11 11:38:31 C 08 44 30.18 +13 46 09.1 18.2 c 704
2001-12-11 12:01:23 C 08 44 29.78 +13 46 11.6 17.8 c 704
2001-12-11 12:24:40 C 08 44 29.27 +13 46 13.4 17.2 c 704
2001-12-14 10:52:07 C 08 43 05.27 +13 53 58.8 16.4 c 704
2001-12-14 11:14:14 C 08 43 04.75 +13 54 01.4 16.7 c 704
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)