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
2024-10-03 14:58:10 C 08 37 36.226 +15 07 11.75 V T05
2024-10-03 15:18:29 C 08 37 37.262 +15 07 08.80 V T05
2024-10-03 15:28:57 C 08 37 37.752 +15 07 08.00 V T05
2024-10-06 14:41:34 C 08 41 11.107 +14 54 56.77 V T05
2024-10-06 15:05:23 C 08 41 12.204 +14 54 52.38 V T05
2024-10-06 15:19:15 C 08 41 12.864 +14 54 49.57 V T05
2024-10-06 15:28:09 C 08 41 13.258 +14 54 47.20 V T05
2024-10-08 14:41:59 C 08 43 31.330 +14 46 49.37 V T08
2024-10-08 15:09:12 C 08 43 32.630 +14 46 44.80 V T08
2024-10-08 15:13:51 C 08 43 32.918 +14 46 44.26 V T08
2024-10-08 15:17:51 C 08 43 33.053 +14 46 43.82 V T08
2024-10-09 12:00:16 C 08 44 32.629 +14 43 13.76 V G96
2024-10-09 12:05:40 C 08 44 32.888 +14 43 12.83 V G96
2024-10-09 12:11:07 C 08 44 33.144 +14 43 11.96 V G96
2024-10-09 12:16:31 C 08 44 33.400 +14 43 11.06 V G96
2024-10-10 14:52:05 C 08 45 49.133 +14 38 44.77 V T05
2024-10-10 14:57:57 C 08 45 49.402 +14 38 43.66 V T05
2024-10-10 15:13:45 C 08 45 50.117 +14 38 41.24 V T05
2024-10-10 15:26:01 C 08 45 50.707 +14 38 38.90 V T05
2024-10-18 14:39:44 C 08 54 27.427 +14 07 38.53 V T05
2024-10-18 14:45:38 C 08 54 27.689 +14 07 37.31 V T05
2024-10-18 15:09:52 C 08 54 28.692 +14 07 33.82 V T05
2024-10-18 15:22:00 C 08 54 29.203 +14 07 31.94 V T05
2024-10-19 12:41:49 C 08 55 23.743 +14 04 11.89 V T08
2024-10-19 12:45:50 C 08 55 23.906 +14 04 11.53 V T08
2024-10-19 12:53:49 C 08 55 24.266 +14 04 09.59 V T08
2024-10-19 13:19:17 C 08 55 25.322 +14 04 06.71 V T08
2024-10-19 13:34:06 C 08 55 25.956 +14 04 03.72 V T05
2024-10-19 14:01:46 C 08 55 27.108 +14 03 59.44 V T05
2024-10-19 14:06:19 C 08 55 27.262 +14 03 58.93 V T05
2024-10-19 14:14:08 C 08 55 27.619 +14 03 57.78 V T05
2024-10-20 14:22:10 C 08 56 28.394 +14 00 14.04 V T08
2024-10-20 14:26:49 C 08 56 28.606 +14 00 13.25 V T08
2024-10-20 14:37:28 C 08 56 29.011 +14 00 11.84 V T08
2024-10-20 14:47:12 C 08 56 29.412 +14 00 10.33 V T08
2024-10-22 14:12:49 C 08 58 26.323 +13 52 58.12 V T05
2024-10-22 14:17:22 C 08 58 26.518 +13 52 57.76 V T05
2024-10-22 14:25:13 C 08 58 26.806 +13 52 56.50 V T05
2024-10-22 14:43:34 C 08 58 27.535 +13 52 53.69 V T05
2024-11-02 14:04:42 C 09 08 10.632 +13 16 39.18 V T05
2024-11-02 14:35:42 C 09 08 11.630 +13 16 35.44 V T05
2024-11-02 14:43:20 C 09 08 11.878 +13 16 34.54 V T05
2024-11-02 14:49:12 C 09 08 12.060 +13 16 33.92 V T05
2024-11-09 07:27:52 C 09 13 06.636 +12 58 33.89 V W68
2024-11-09 07:33:51 C 09 13 06.799 +12 58 32.74 V W68
2024-11-09 07:41:44 C 09 13 07.008 +12 58 32.02 V W68
2024-11-09 08:12:37 C 09 13 07.862 +12 58 29.17 V W68
2024-11-10 13:17:41 C 09 13 55.750 +12 55 34.54 V T05
2024-11-10 13:22:15 C 09 13 55.879 +12 55 34.14 V T05
2024-11-10 13:40:18 C 09 13 56.347 +12 55 32.38 V T05
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)