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
2021-10-16 06:03:57 s 1 +116396.06 3 +312980.54 4230.0 C57
2021-10-16 10:53:57 S 06 45 23.009 +13 52 26.40 V C57
2021-10-16 10:53:57 s 1 +107398.85 9 +322968.99 8810.0 C57
2021-10-16 11:03:57 S 06 45 23.287 +13 52 26.76 V C57
2021-10-16 11:03:57 s 1 +107082.56 1 +323295.88 8160.0 C57
2021-10-16 11:13:57 S 06 45 23.357 +13 52 26.08 V C57
2021-10-16 11:13:57 s 1 +106765.87 9 +323621.62 6260.0 C57
2021-10-16 13:13:57 S 06 45 25.318 +13 52 11.46 V C57
2021-10-16 13:13:57 s 1 +102936.37 3 +327440.26 8020.0 C57
2021-10-16 13:43:57 S 06 45 25.927 +13 52 07.50 V C57
2021-10-16 13:43:57 s 1 +101970.74 8 +328369.00 1630.0 C57
2021-10-16 15:43:57 S 06 45 27.790 +13 51 54.29 V C57
2021-10-16 15:43:57 s 1 +98076.639 0 +331980.91 3560.0 C57
2021-10-16 15:53:57 S 06 45 27.934 +13 51 52.02 V C57
2021-10-16 15:53:57 s 1 +97749.905 0 +332274.49 9010.0 C57
2021-10-16 16:03:57 S 06 45 28.106 +13 51 50.11 V C57
2021-10-16 16:03:57 s 1 +97422.836 0 +332566.92 3380.0 C57
2021-10-18 14:18:15 C 06 46 04.34 +13 45 09.8 V T08
2021-10-18 14:44:58 C 06 46 04.73 +13 45 06.8 V T08
2021-10-18 14:50:17 C 06 46 04.79 +13 45 06.3 V T08
2021-10-18 15:13:39 C 06 46 05.12 +13 45 03.7 V T08
2021-10-19 13:22:04 C 06 46 24.26 +13 42 34.5 V T05
2021-10-19 13:28:02 C 06 46 24.33 +13 42 33.8 V T05
2021-10-19 13:34:00 C 06 46 24.40 +13 42 33.2 V T05
2021-10-19 13:48:35 C 06 46 24.58 +13 42 31.5 V T05
2021-10-21 12:23:08 C 06 46 59.04 +13 37 24.0 V T08
2021-10-21 12:25:47 C 06 46 59.07 +13 37 23.7 V T08
2021-10-21 12:30:27 C 06 46 59.11 +13 37 23.4 V T08
2021-10-21 12:45:44 C 06 46 59.28 +13 37 21.8 V T08
2021-10-28 15:00:37 C 06 47 58.69 +13 20 07.2 V T05
2021-10-28 15:04:45 C 06 47 58.68 +13 20 06.9 V T05
2021-10-28 15:12:30 C 06 47 58.68 +13 20 06.2 V T05
2021-10-30 12:54:56 C 06 47 56.55 +13 15 56.8 V T08
2021-10-30 12:58:15 C 06 47 56.55 +13 15 56.6 V T08
2021-10-30 13:02:14 C 06 47 56.53 +13 15 56.3 V T08
2021-10-30 13:11:26 C 06 47 56.50 +13 15 55.4 V T08
2021-11-01 13:30:55 C 06 47 45.25 +13 11 47.1 V T05
2021-11-01 13:33:33 C 06 47 45.23 +13 11 46.9 V T05
2021-11-01 13:37:30 C 06 47 45.20 +13 11 46.7 V T05
2021-11-01 14:14:48 C 06 47 44.94 +13 11 43.6 V T05
2021-11-05 13:44:49 C 06 46 55.70 +13 04 25.2 V T05
2021-11-05 14:10:00 C 06 46 55.37 +13 04 23.2 V T05
2021-11-05 14:49:58 C 06 46 54.83 +13 04 20.6 V T05
2021-11-05 15:25:52 C 06 46 54.35 +13 04 18.0 V T05
2021-11-07 11:29:19 C 06 46 19.51 +13 01 21.4 V T08
2021-11-07 11:39:35 C 06 46 19.35 +13 01 20.7 V T08
2021-11-07 11:42:15 C 06 46 19.31 +13 01 20.5 V T08
2021-11-07 11:51:34 C 06 46 19.15 +13 01 19.9 V T08
2021-11-07 19:43:55 S 06 46 21.230 +13 01 45.01 V C57
2021-11-07 19:43:55 s 1 +150301.52 5 +28233.469 1710.0 C57
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)