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
2025-01-08 19:52:00 C 09 07 14.93 +14 38 26.9 V D29
2025-01-09 10:41:37 C 09 06 38.957 +14 42 27.18 V T08
2025-01-09 10:44:19 C 09 06 38.851 +14 42 27.86 V T08
2025-01-09 10:48:16 C 09 06 38.678 +14 42 28.87 V T08
2025-01-09 10:55:35 C 09 06 38.366 +14 42 30.89 V T08
2025-01-11 09:27:27 C 09 04 41.002 +14 55 19.06 V T05
2025-01-11 09:32:01 C 09 04 40.800 +14 55 20.32 V T05
2025-01-11 09:37:54 C 09 04 40.531 +14 55 22.08 V T05
2025-01-11 12:43:41 C 09 04 32.266 +14 56 14.28 V T05
2025-01-12 05:41:42 C 09 03 48.026 +15 01 05.99 V W68
2025-01-12 05:48:52 C 09 03 47.719 +15 01 08.11 V W68
2025-01-12 05:51:28 C 09 03 47.594 +15 01 08.76 V W68
2025-01-12 06:00:34 C 09 03 47.213 +15 01 11.14 V W68
2025-01-12 20:51:24 B 09 03 08.006 +15 05 18.20 X K35
2025-01-12 20:52:30 B 09 03 07.949 +15 05 18.64 X K35
2025-01-12 23:56:02 B 09 02 59.647 +15 06 11.70 X K87
2025-01-13 00:05:29 B 09 02 59.210 +15 06 14.29 X K87
2025-01-13 00:14:55 B 09 02 58.783 +15 06 17.14 X K87
2025-01-15 02:36:25 C 09 00 41.06 +15 20 59.6 q D99
2025-01-15 02:41:47 C 09 00 40.76 +15 21 00.7 q D99
2025-01-15 02:47:09 C 09 00 40.41 +15 21 02.4 q D99
2025-01-15 20:33:59 C 08 59 50.89 +15 26 19.0 q D99
2025-01-15 20:44:38 C 08 59 50.36 +15 26 22.6 q D99
2025-01-15 20:54:00 C 08 59 49.94 +15 26 25.5 q D99
2025-01-17 12:19:29 C 08 57 56.606 +15 38 21.23 V T08
2025-01-17 12:25:01 C 08 57 56.333 +15 38 22.85 V T08
2025-01-17 12:33:05 C 08 57 55.925 +15 38 25.33 V T08
2025-01-17 13:23:02 C 08 57 53.441 +15 38 40.42 V T08
2025-01-19 09:03:58 C 08 55 44.850 +15 52 04.48 V V00
2025-01-19 09:12:05 C 08 55 44.440 +15 52 06.96 V V00
2025-01-19 09:20:10 C 08 55 44.026 +15 52 09.41 V V00
2025-01-19 09:28:14 C 08 55 43.615 +15 52 11.93 V V00
2025-01-19 10:06:03 C 08 55 41.678 +15 52 23.45 V G96
2025-01-19 10:13:32 C 08 55 41.293 +15 52 25.79 V G96
2025-01-19 10:21:00 C 08 55 40.912 +15 52 28.02 V G96
2025-01-19 10:28:29 C 08 55 40.530 +15 52 30.32 V G96
2025-01-19 12:08:55 C 08 55 35.626 +15 53 02.83 V T05
2025-01-19 12:30:52 C 08 55 34.500 +15 53 09.56 X F51
2025-01-19 12:48:39 C 08 55 33.588 +15 53 15.01 X F51
2025-01-19 12:53:21 C 08 55 33.346 +15 53 16.40 V T05
2025-01-19 12:59:02 C 08 55 33.055 +15 53 18.28 V T05
2025-01-19 13:06:27 C 08 55 32.679 +15 53 20.44 X F51
2025-01-19 13:07:50 C 08 55 32.602 +15 53 20.87 V T05
2025-01-20 01:16:51 B 08 54 56.32 +15 57 06.8 V J43
2025-01-20 01:32:14 B 08 54 55.53 +15 57 11.4 V J43
2025-01-20 01:47:38 B 08 54 54.74 +15 57 16.2 V J43
2025-01-20 11:06:40 C 08 54 26.647 +16 00 11.81 V T08
2025-01-20 11:14:25 C 08 54 26.244 +16 00 14.15 V T08
2025-01-20 11:54:38 C 08 54 24.163 +16 00 26.71 V T08
2025-01-20 11:55:18 C 08 54 24.120 +16 00 26.86 V T08
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)