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
2022-03-15 04:39:18 C 05 33 17.42 +19 12 01.6 V G96
2022-03-20 23:57:53 C 05 38 25.339 +19 32 24.79 V W68
2022-03-21 00:05:11 C 05 38 25.618 +19 32 25.69 V W68
2022-03-21 00:09:44 C 05 38 25.776 +19 32 26.30 V W68
2022-03-21 00:25:01 C 05 38 26.369 +19 32 28.54 V W68
2022-04-09 03:52:25 C 05 59 05.321 +20 27 20.92 U I41
2022-04-09 05:20:19 C 05 59 09.710 +20 27 29.09 U I41
2022-04-13 03:59:57 C 06 04 00.641 +20 36 10.40 U I41
2022-04-13 04:19:07 C 06 04 01.620 +20 36 11.99 U I41
2022-04-15 19:30:48 C 06 07 21.473 +20 41 26.41 V A16
2022-04-15 19:47:38 C 06 07 22.382 +20 41 27.92 V A16
2022-04-15 20:03:38 C 06 07 23.246 +20 41 29.15 V A16
2022-04-29 03:09:35 C 06 25 12.313 +21 01 02.17 V G96
2022-04-29 03:15:01 C 06 25 12.630 +21 01 02.39 V G96
2022-04-29 03:20:28 C 06 25 12.943 +21 01 02.71 V G96
2022-04-29 03:25:56 C 06 25 13.260 +21 01 02.89 V G96
2022-10-28 12:00:28 C 11 15 36.122 +06 52 17.94 V V00
2022-10-28 12:06:50 C 11 15 36.533 +06 52 15.89 V V00
2022-10-28 12:13:11 C 11 15 36.932 +06 52 13.80 V V00
2022-10-28 12:19:32 C 11 15 37.343 +06 52 11.82 V V00
2022-11-11 14:56:54 C 11 37 00.958 +05 05 51.79 V T08
2022-11-11 15:16:35 C 11 37 02.172 +05 05 45.38 V T08
2022-11-11 15:28:21 C 11 37 02.899 +05 05 41.75 V T08
2022-11-21 12:12:44 C 11 51 40.928 +03 55 06.17 V 703
2022-11-21 12:20:22 C 11 51 41.389 +03 55 03.43 V 703
2022-11-21 12:28:01 C 11 51 41.843 +03 55 01.38 V 703
2022-11-21 12:35:39 C 11 51 42.340 +03 54 59.22 V 703
2022-11-25 12:18:33 C 11 57 31.856 +03 27 41.33 V 703
2022-11-25 12:26:17 C 11 57 32.328 +03 27 39.13 V 703
2022-11-25 12:34:01 C 11 57 32.767 +03 27 36.97 V 703
2022-11-25 12:41:45 C 11 57 33.232 +03 27 34.88 V 703
2022-12-15 13:52:16 C 12 25 47.318 +01 26 00.89 V T05
2022-12-15 14:40:29 C 12 25 50.002 +01 25 50.16 V T05
2022-12-15 14:49:02 C 12 25 50.479 +01 25 48.25 V T05
2022-12-15 14:54:15 C 12 25 50.777 +01 25 47.28 V T05
2022-12-19 11:38:30 C 12 31 02.489 +01 06 06.59 U I41
2022-12-19 11:39:52 C 12 31 02.570 +01 06 06.30 U I41
2022-12-19 13:07:33 C 12 31 07.361 +01 05 48.52 U I41
2022-12-19 13:08:55 C 12 31 07.440 +01 05 48.19 U I41
2022-12-21 10:49:39 C 12 33 38.839 +00 56 40.70 U I41
2022-12-21 11:17:56 C 12 33 40.380 +00 56 35.02 U I41
2022-12-21 12:50:41 C 12 33 45.401 +00 56 17.02 U I41
2022-12-25 10:30:52 C 12 38 50.629 +00 38 50.24 V 703
2022-12-25 10:39:09 C 12 38 51.090 +00 38 48.55 V 703
2022-12-25 10:47:26 C 12 38 51.533 +00 38 47.22 V 703
2022-12-25 10:55:44 C 12 38 51.961 +00 38 45.85 V 703
2022-12-31 23:12:45 S 12 47 04.30 +00 13 43.0 L C51
2023-01-01 01:19:23 C 12 47 11.119 +00 13 26.54 V M22
2023-01-01 01:23:58 C 12 47 11.342 +00 13 26.00 V M22
2023-01-01 01:33:08 C 12 47 11.818 +00 13 24.71 V M22
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)