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
2025-04-14 06:52:07 C 08 07 27.622 +21 56 08.23 V T08
2025-04-14 20:01:54 C 08 07 47.43 +21 55 52.0 X C40
2025-04-14 20:03:10 C 08 07 47.590 +21 55 51.82 Z C23
2025-04-14 20:03:54 C 08 07 47.49 +21 55 52.5 X C40
2025-04-14 20:05:55 C 08 07 47.53 +21 55 51.3 X C40
2025-04-14 20:07:56 C 08 07 47.57 +21 55 50.4 X C40
2025-04-14 20:17:58 C 08 07 47.88 +21 55 50.5 X C40
2025-04-14 20:19:58 C 08 07 47.81 +21 55 50.4 X C40
2025-04-14 20:21:59 C 08 07 47.90 +21 55 51.1 X C40
2025-04-14 20:31:24 C 08 07 48.276 +21 55 51.53 Z C23
2025-04-14 21:30:22 C 08 07 49.762 +21 55 50.45 Z C23
2025-04-15 06:26:39 C 08 08 03.550 +21 55 41.95 V T08
2025-04-15 06:31:58 C 08 08 03.665 +21 55 41.81 V T08
2025-04-15 06:39:24 C 08 08 03.874 +21 55 41.56 V T08
2025-04-15 06:54:13 C 08 08 04.229 +21 55 41.34 V T08
2025-04-16 06:40:44 C 08 08 41.839 +21 55 08.90 V T05
2025-04-16 06:48:21 C 08 08 42.036 +21 55 08.72 V T05
2025-04-16 06:52:59 C 08 08 42.173 +21 55 08.62 V T05
2025-04-16 07:10:18 C 08 08 42.605 +21 55 08.04 V T05
2025-04-16 19:28:26 C 08 09 02.60 +21 54 47.5 X C40
2025-04-16 19:33:19 C 08 09 02.73 +21 54 47.4 X C40
2025-04-16 19:35:44 C 08 09 02.78 +21 54 47.3 X C40
2025-04-16 19:42:57 C 08 09 02.94 +21 54 46.7 X C40
2025-04-16 19:47:40 C 08 09 03.11 +21 54 46.5 X C40
2025-04-16 19:52:05 C 08 09 03.21 +21 54 46.7 X C40
2025-04-17 18:11:47 C 08 09 40.48 +21 54 07.5 X D04
2025-04-17 18:24:19 C 08 09 40.95 +21 54 09.2 X D04
2025-04-17 18:36:40 C 08 09 41.15 +21 54 07.6 X D04
2025-04-18 18:55:23 C 08 10 23.09 +21 53 19.8 X D04
2025-04-18 19:13:31 C 08 10 23.53 +21 53 19.6 X D04
2025-04-18 20:30:27 C 08 10 25.850 +21 53 16.91 Z C23
2025-04-18 21:11:43 C 08 10 27.072 +21 53 15.72 Z C23
2025-04-18 21:54:19 C 08 10 28.322 +21 53 14.14 Z C23
2025-04-22 18:32:34 C 08 13 20.80 +21 49 20.3 X D04
2025-04-22 19:03:41 C 08 13 21.79 +21 49 17.7 X D04
2025-04-22 19:09:39 C 08 13 21.99 +21 49 18.1 X D04
2025-04-24 09:12:31 C 08 14 38.194 +21 47 18.71 V T05
2025-04-24 09:16:11 C 08 14 38.316 +21 47 18.56 V T05
2025-04-24 09:22:13 C 08 14 38.525 +21 47 17.99 V T05
2025-04-24 20:54:35 C 08 15 02.419 +21 46 39.18 V R17
2025-04-24 21:15:05 C 08 15 03.103 +21 46 37.96 V R17
2025-04-24 21:35:37 C 08 15 03.804 +21 46 36.70 V R17
2025-04-24 21:56:10 C 08 15 04.483 +21 46 35.40 V R17
2025-04-25 06:33:08 C 08 15 22.447 +21 46 05.84 V T05
2025-04-25 06:37:46 C 08 15 22.603 +21 46 05.56 V T05
2025-04-25 06:45:44 C 08 15 22.886 +21 46 05.12 V T05
2025-04-25 07:02:14 C 08 15 23.436 +21 46 03.97 V T05
2025-04-25 20:40:56 C 08 15 52.229 +21 45 13.32 Z C23
2025-04-25 21:12:08 C 08 15 53.280 +21 45 10.33 Z C23
2025-04-25 22:01:36 C 08 15 55.044 +21 45 07.38 Z C23
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)