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
2021-10-03 13:43:58 S 06 37 20.688 +14 29 43.80 V C57
2021-10-03 13:43:58 s 1 +112065.27 3 +319896.83 4980.0 C57
2021-10-03 13:53:58 S 06 37 21.077 +14 29 43.51 V C57
2021-10-03 13:53:58 s 1 +111745.08 0 +320235.88 260.0 C57
2021-10-03 14:03:58 S 06 37 21.209 +14 29 40.31 V C57
2021-10-03 14:03:58 s 1 +111424.49 3 +320573.76 4290.0 C57
2021-10-03 14:13:58 S 06 37 21.638 +14 29 39.84 V C57
2021-10-03 14:13:58 s 1 +111103.51 1 +320910.47 7080.0 C57
2021-10-03 15:23:58 S 06 37 23.786 +14 29 32.06 V C57
2021-10-03 15:23:58 s 1 +108845.79 3 +323234.79 2320.0 C57
2021-10-03 15:33:58 S 06 37 24.281 +14 29 29.51 V C57
2021-10-03 15:33:58 s 1 +108521.73 4 +323562.17 5390.0 C57
2021-10-03 15:43:58 S 06 37 24.514 +14 29 28.25 V C57
2021-10-03 15:43:58 s 1 +108197.29 8 +323888.40 7260.0 C57
2021-10-03 15:53:58 S 06 37 24.842 +14 29 27.20 V C57
2021-10-03 15:53:58 s 1 +107872.48 8 +324213.46 7960.0 C57
2021-10-03 16:03:58 S 06 37 25.099 +14 29 27.20 V C57
2021-10-03 16:03:58 s 1 +107547.30 5 +324537.37 7480.0 C57
2021-10-03 16:13:58 S 06 37 25.519 +14 29 24.32 V C57
2021-10-03 16:13:58 s 1 +107221.75 1 +324860.11 5820.0 C57
2021-10-03 16:23:58 S 06 37 25.891 +14 29 24.32 V C57
2021-10-03 16:23:58 s 1 +106895.82 8 +325181.70 3010.0 C57
2021-10-03 16:33:58 S 06 37 26.225 +14 29 23.57 V C57
2021-10-03 16:33:58 s 1 +106569.53 7 +325502.12 9030.0 C57
2021-10-03 16:37:43 S 06 37 17.86 +14 28 01.2 L C51
2021-10-03 16:37:55 S 06 37 17.85 +14 28 01.1 L C51
2021-10-03 16:43:58 S 06 37 26.513 +14 29 21.62 V C57
2021-10-03 16:43:58 s 1 +106242.88 1 +325821.39 3900.0 C57
2021-10-03 17:43:58 S 06 37 28.416 +14 29 14.86 V C57
2021-10-03 17:43:58 s 1 +104275.36 4 +327712.76 9240.0 C57
2021-10-03 17:53:58 S 06 37 28.711 +14 29 16.26 V C57
2021-10-03 17:53:58 s 1 +103946.19 8 +328023.95 6200.0 C57
2021-10-03 18:03:58 S 06 37 28.898 +14 29 10.32 V C57
2021-10-03 18:03:58 s 1 +103616.68 1 +328333.99 2060.0 C57
2021-10-03 18:13:58 S 06 37 29.258 +14 29 10.32 V C57
2021-10-03 18:13:58 s 1 +103286.81 4 +328642.88 6810.0 C57
2021-10-03 18:23:58 S 06 37 29.638 +14 29 07.84 V C57
2021-10-03 18:23:58 s 1 +102956.59 8 +328950.62 470.0 C57
2021-10-03 18:33:58 S 06 37 30.122 +14 29 07.26 V C57
2021-10-03 18:33:58 s 1 +102626.03 7 +329257.21 3030.0 C57
2021-10-03 18:43:58 S 06 37 30.341 +14 29 05.28 V C57
2021-10-03 18:43:58 s 1 +102295.13 0 +329562.65 4520.0 C57
2021-10-03 18:53:58 S 06 37 30.578 +14 29 03.59 V C57
2021-10-03 18:53:58 s 1 +101963.88 1 +329866.95 4920.0 C57
2021-10-03 19:03:58 S 06 37 30.984 +14 29 02.36 V C57
2021-10-03 19:03:58 s 1 +101632.29 1 +330170.10 4250.0 C57
2021-10-03 19:13:58 S 06 37 31.318 +14 29 01.14 V C57
2021-10-03 19:13:58 s 1 +101300.36 1 +330472.10 2520.0 C57
2021-10-03 20:23:58 S 06 37 33.538 +14 28 55.42 V C57
2021-10-03 20:23:58 s 1 +98967.489 0 +332554.10 920.0 C57
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)