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
2021-12-25 10:59:21 C 05 54 27.24 +13 43 47.6 V T08
2021-12-25 11:31:23 C 05 54 25.32 +13 43 51.6 V T08
2021-12-25 16:35:57 C 05 54 07.70 +13 44 30.5 V D29
2021-12-25 17:06:30 C 05 54 05.88 +13 44 34.4 V D29
2021-12-25 17:37:03 C 05 54 04.07 +13 44 38.5 V D29
2021-12-26 05:24:57 C 05 53 23.33 +13 46 11.7 Z V41
2021-12-26 05:47:31 C 05 53 21.99 +13 46 14.1 Z V41
2021-12-26 06:44:05 C 05 53 18.65 +13 46 22.1 Z V41
2021-12-26 06:57:39 C 05 53 17.87 +13 46 23.4 Z V41
2021-12-26 12:25:37 C 05 52 58.94 +13 47 16.1 q E89
2021-12-26 12:28:21 C 05 52 58.75 +13 47 17.1 q E89
2021-12-26 12:31:58 C 05 52 58.54 +13 47 17.8 q E89
2021-12-29 23:12:06 C 05 48 17.82 +13 58 38.7 V M03
2021-12-29 23:25:13 C 05 48 17.08 +13 58 40.5 V M03
2021-12-29 23:38:21 C 05 48 16.33 +13 58 42.5 V M03
2021-12-30 23:48:41 C 05 46 56.46 +14 02 12.4 V M03
2021-12-31 00:08:22 C 05 46 55.36 +14 02 15.2 V M03
2021-12-31 00:28:03 C 05 46 54.25 +14 02 18.1 V M03
2022-01-01 21:26:16 C 05 44 29.11 +14 08 58.3 V 130
2022-01-01 21:27:48 C 05 44 29.03 +14 08 58.6 V 130
2022-01-01 21:29:19 C 05 44 28.94 +14 08 58.9 V 130
2022-01-01 21:30:29 C 05 44 28.85 +14 08 58.5 V 130
2022-01-03 06:30:22 C 05 42 45.01 +14 14 00.4 Z V41
2022-01-03 06:50:43 C 05 42 43.92 +14 14 03.4 Z V41
2022-01-03 07:08:49 C 05 42 42.97 +14 14 06.3 Z V41
2022-01-05 03:52:24 C 05 40 27.06 +14 21 05.1 V V11
2022-01-05 04:11:41 C 05 40 26.08 +14 21 08.1 V V11
2022-01-05 04:30:28 C 05 40 25.13 +14 21 11.1 V V11
2022-01-05 17:52:16 C 05 39 45.61 +14 23 17.2 V L92
2022-01-05 18:00:31 C 05 39 45.16 +14 23 19.1 V L92
2022-01-05 18:10:49 C 05 39 44.65 +14 23 20.7 V L92
2022-01-05 18:21:07 C 05 39 44.11 +14 23 21.9 V L92
2022-01-06 06:18:21 C 05 39 08.83 +14 25 17.3 V G96
2022-01-06 06:27:16 C 05 39 08.36 +14 25 18.4 V G96
2022-01-06 06:36:11 C 05 39 07.93 +14 25 20.2 V G96
2022-01-06 06:45:07 C 05 39 07.47 +14 25 21.4 V G96
2022-01-07 00:19:22 C 05 38 16.66 +14 28 09.8 V Y86
2022-01-07 01:05:01 C 05 38 14.41 +14 28 17.2 V Y86
2022-01-07 01:40:17 C 05 38 12.71 +14 28 23.0 V Y86
2022-01-08 01:05:46 C 05 37 06.56 +14 32 11.0 V Y86
2022-01-08 01:46:08 C 05 37 04.63 +14 32 17.4 V Y86
2022-01-08 02:26:30 C 05 37 02.72 +14 32 23.9 V Y86
2022-01-08 09:24:46 C 05 36 43.60 +14 33 34.3 V T05
2022-01-08 09:29:24 C 05 36 43.37 +14 33 35.1 V T05
2022-01-08 09:37:19 C 05 36 43.00 +14 33 36.5 V T05
2022-01-08 09:44:35 C 05 36 42.66 +14 33 37.7 V T05
2022-01-08 09:49:18 C 05 36 42.44 +14 33 38.4 V T05
2022-01-08 09:51:56 C 05 36 42.30 +14 33 38.7 V T05
2022-01-08 09:57:57 C 05 36 42.02 +14 33 39.8 V T05
2022-01-08 16:40:20 B 05 36 23.55 +14 34 45.1 V O47
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)