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
2025-02-22 17:36:51 C 08 14 38.15 +19 55 13.2 X G02
2025-02-22 17:43:40 C 08 14 37.88 +19 55 14.8 X G02
2025-02-23 06:53:25 C 08 14 06.961 +19 58 18.70 V V00
2025-02-23 07:01:31 C 08 14 06.637 +19 58 20.53 V V00
2025-02-23 07:09:35 C 08 14 06.317 +19 58 22.37 V V00
2025-02-23 07:17:39 C 08 14 05.996 +19 58 24.17 V V00
2025-02-23 08:54:27 C 08 14 02.381 +19 58 47.53 V T05
2025-02-23 08:58:29 C 08 14 02.222 +19 58 48.47 V T05
2025-02-23 09:08:17 C 08 14 01.831 +19 58 50.81 V T05
2025-02-23 09:23:45 C 08 14 01.212 +19 58 54.26 V T05
2025-02-23 09:56:03 C 08 13 59.926 +19 59 01.48 X F51
2025-02-23 10:13:12 C 08 13 59.245 +19 59 05.34 X F51
2025-02-23 10:30:13 C 08 13 58.572 +19 59 09.20 X F51
2025-02-23 10:47:15 C 08 13 57.899 +19 59 13.00 X F51
2025-02-23 14:40:24 C 08 13 49.087 +20 00 05.04 q P69
2025-02-23 15:13:09 C 08 13 47.803 +20 00 12.20 q P69
2025-02-23 15:43:35 C 08 13 46.625 +20 00 19.12 q P69
2025-02-23 16:15:43 C 08 13 45.370 +20 00 26.35 q P69
2025-02-24 02:35:59 B 08 13 22.17 +20 02 46.9 Z W45
2025-02-24 02:56:49 B 08 13 21.36 +20 02 51.8 Z W45
2025-02-24 03:17:40 B 08 13 20.55 +20 02 56.3 Z W45
2025-02-24 07:02:14 C 08 13 12.305 +20 03 48.17 V T08
2025-02-24 07:08:26 C 08 13 12.077 +20 03 49.43 V T05
2025-02-24 07:24:04 C 08 13 11.465 +20 03 52.96 V T08
2025-02-24 07:29:59 C 08 13 11.239 +20 03 54.14 V T05
2025-02-24 20:18:24 B 08 12 42.998 +20 06 43.99 J51
2025-02-24 20:52:14 C 08 12 41.448 +20 06 51.48 V 088
2025-02-24 20:53:51 C 08 12 41.383 +20 06 51.80 V 088
2025-02-24 20:55:26 C 08 12 41.326 +20 06 52.16 V 088
2025-02-24 20:57:02 C 08 12 41.258 +20 06 52.52 V 088
2025-02-24 20:58:55 C 08 12 41.198 +20 06 52.99 V 088
2025-02-24 21:00:45 C 08 12 41.119 +20 06 53.35 V 088
2025-02-24 21:02:37 C 08 12 41.057 +20 06 53.71 V 088
2025-02-24 21:04:45 C 08 12 40.968 +20 06 54.11 V 088
2025-02-24 21:05:18 C 08 12 41.066 +20 06 52.96 Z C23
2025-02-24 21:06:52 C 08 12 40.891 +20 06 54.61 V 088
2025-02-24 21:08:59 C 08 12 40.819 +20 06 55.19 V 088
2025-02-24 21:12:12 C 08 12 40.814 +20 06 54.25 Z C23
2025-02-24 21:28:50 B 08 12 40.294 +20 07 00.30 J51
2025-02-24 21:53:34 B 08 12 39.384 +20 07 04.84 J51
2025-02-25 09:07:58 C 08 12 14.779 +20 09 33.70 V T08
2025-02-25 09:12:36 C 08 12 14.597 +20 09 34.74 V T08
2025-02-25 09:24:19 C 08 12 14.167 +20 09 37.22 V T08
2025-02-25 09:38:59 C 08 12 13.618 +20 09 40.32 V T08
2025-02-26 08:55:16 C 08 11 24.334 +20 14 40.49 V T08
2025-02-26 09:05:06 C 08 11 23.986 +20 14 42.65 V T08
2025-02-26 09:09:44 C 08 11 23.818 +20 14 43.62 V T08
2025-02-26 09:25:03 C 08 11 23.268 +20 14 46.79 V T08
2025-02-26 22:01:58 C 08 10 57.432 +20 17 25.48 V R17
2025-02-26 22:22:23 C 08 10 56.710 +20 17 29.80 V R17
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)