4769 Castalia (1989 PB)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4831981091 ± 2.00e+00
Semi-major axis (a)1.0630936583 AU ± 3.00e+00
Inclination (i)8.88518894° ± 4.00e+00
Long. of Asc. Node (Ω)325.50236492° ± 5.00e+00
Arg. of Perihelion (ω)121.45274993° ± 6.00e+00
Mean Anomaly (M)323.77077031° ± 1.44e-04
Mean Motion (n)0.8991972810°/day ± 3.81e+00
Perihelion dist (q)0.54940881 AU ± 2.63e+00
Aphelion dist (Q)1.57677850 AU ± 4.93e+00
Orbital Period1.09611795 yr ± 4.64e+00
NGA Modelr2
A2-3.22072326e-06 AU/d²
Physical Parameters
H (abs. magnitude)17.40
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-26
RMS Residual0.435″
Uncertainty0
Orbit TypeApollo
MOID0.020034 AU
Observations Used614
Radar Obs Used13
Gaia Obs Used139
Oppositions2
Arc Total1989-2026
First Observation Used1989-08-01
Last Observation Used2026-03-31
Observations (654)
Date Type RA Dec Mag Band Observatory
2012-08-31 01:27:16 C 16 53 12.75 -14 09 44.6 u H21
2012-08-31 01:29:25 C 16 53 11.57 -14 09 37.1 u H21
2012-08-31 01:31:18 C 16 53 10.53 -14 09 30.4 u H21
2012-08-31 01:33:27 C 16 53 09.34 -14 09 22.7 u H21
2012-08-31 01:35:20 C 16 53 08.30 -14 09 15.9 u H21
2012-08-31 01:38:49 C 16 53 06.39 -14 09 03.8 u H21
2012-09-04 09:34:23 C 16 01 27.21 -08 02 31.9 r E12
2012-09-04 09:50:37 C 16 01 19.59 -08 01 36.1 r E12
2012-09-04 10:23:35 C 16 01 04.20 -07 59 43.2 r E12
2012-09-10 17:47:27 C 15 01 17.41 -00 21 56.3 u 089
2012-09-10 17:52:26 C 15 01 15.67 -00 21 44.0 u 089
2012-09-10 17:57:20 C 15 01 13.94 -00 21 31.6 u 089
2013-06-08 07:12:38 C 20 17 48.301 -36 55 45.65 o 844
2013-06-08 07:23:23 C 20 17 47.599 -36 55 49.13 o 844
2013-08-02 03:40:51 C 17 26 51.77 -35 42 27.7 r Y00
2013-08-02 03:45:56 C 17 26 51.30 -35 42 23.7 r Y00
2013-08-02 03:50:29 C 17 26 50.84 -35 42 20.2 r Y00
2013-08-03 02:09:23 C 17 24 48.52 -35 26 11.9 r Y00
2013-08-03 02:15:53 C 17 24 47.89 -35 26 06.8 r Y00
2013-08-03 02:22:24 C 17 24 47.30 -35 26 02.6 r Y00
2013-08-08 02:29:56 C 17 15 25.66 -33 58 41.4 r Y00
2013-08-08 02:36:26 C 17 15 25.18 -33 58 34.8 r Y00
2013-08-08 02:42:57 C 17 15 24.63 -33 58 31.4 r Y00
2013-09-08 06:01:05 C 17 05 30.510 -26 33 00.17 L F51
2013-09-08 06:03:00 C 17 05 30.550 -26 32 59.16 L F51
2013-09-08 06:16:02 C 17 05 30.854 -26 32 53.09 L F51
2013-09-08 06:17:58 C 17 05 30.889 -26 32 52.12 L F51
2015-03-26 16:43:24 S 18 30 33.022 -43 33 44.75 L C51
2015-03-26 23:01:42 S 18 30 16.615 -43 39 00.61 L C51
2015-03-27 00:36:19 S 18 30 12.367 -43 40 15.24 L C51
2015-03-27 02:10:45 S 18 30 08.220 -43 41 34.62 L C51
2015-03-27 03:45:22 S 18 30 04.102 -43 42 52.34 L C51
2015-03-27 06:54:25 S 18 29 55.786 -43 45 28.94 L C51
2015-06-06 03:44:59 C 14 20 33.41 -40 12 42.4 q W88
2015-06-06 05:45:32 C 14 20 25.53 -40 10 24.2 q W88
2015-06-06 06:53:06 C 14 20 21.24 -40 09 06.6 q W88
2015-06-20 06:32:32 C 14 09 51.373 -34 43 52.03 L F51
2015-06-20 06:45:59 C 14 09 51.228 -34 43 41.10 L F51
2015-06-20 06:59:21 C 14 09 51.082 -34 43 30.30 L F51
2015-06-20 07:12:44 C 14 09 50.938 -34 43 19.40 L F51
2015-07-02 02:48:57 C 14 12 20.75 -31 31 08.2 u 807
2015-07-02 02:53:18 C 14 12 20.81 -31 31 05.9 u 807
2015-07-02 02:57:52 C 14 12 20.92 -31 31 04.0 u 807
2015-07-02 03:02:00 C 14 12 21.03 -31 31 01.8 u 807
2015-07-03 01:37:04 C 14 12 52.02 -31 18 45.3 u 807
2015-07-03 01:41:18 C 14 12 52.09 -31 18 43.7 u 807
2015-07-03 01:45:44 C 14 12 52.15 -31 18 40.7 u 807
2015-07-03 01:49:45 C 14 12 52.24 -31 18 39.0 u 807
2015-07-03 01:54:12 C 14 12 52.32 -31 18 36.5 u 807
2016-04-15 06:02:25 C 06 15 20.64 -06 46 28.8 L T05
Radar Observations (27)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
1989-08-19 06:23:00 223401 2 Hz 2380 -1 -1
1989-08-19 07:04:00 59512323 10 us 2380 -1 -1
1989-08-19 07:14:00 59456416 10 us 2380 -1 -1
1989-08-19 07:23:00 59406173 10 us 2380 -1 -1
1989-08-19.265972 22340100 200 Hz 2380 251 251
1989-08-19.294444 5951232300 10000 us 2380 251 251
1989-08-19.301389 5945641600 10000 us 2380 251 251
1989-08-19.307639 5940617300 10000 us 2380 251 251
1989-08-20 05:42:00 215029 2 Hz 2380 -1 -1
1989-08-20 07:16:00 211450 1 Hz 2380 -1 -1
1989-08-20.237500 21502900 200 Hz 2380 251 251
1989-08-20.302778 21145000 100 Hz 2380 251 251
1989-08-21 06:14:00 44374924 3 us 2380 -1 -1
1989-08-21 06:18:00 44354892 3 us 2380 -1 -1
1989-08-21 06:59:00 196833 2 Hz 2380 -1 -1
1989-08-21 07:24:00 195785 1 Hz 2380 -1 -1
1989-08-21.259722 4437492400 3000 us 2380 251 251
1989-08-21.262500 4435489200 3000 us 2380 251 251
1989-08-21.290972 19683300 200 Hz 2380 251 251
1989-08-21.308333 19578500 100 Hz 2380 251 251
1989-08-22 06:45:00 37453066.9 0.3 us 2380 -1 -1
1989-08-22 07:06:00 37361686 2 us 2380 -1 -1
1989-08-22.281250 3745306690 300 us 2380 251 251
1989-08-22.295833 3736168600 2000 us 2380 251 251
1989-08-30 19:35:00 -785297 8 Hz 8495 -14 -14
1989-08-30.815972 -78529700 800 Hz 8495 253 253
2012-09-14 19:40:00 160720139.48 2 us 2380 -1 -1
Station codes
-14 DSS-14 Goldstone (70-m) -1 Arecibo (305-m, 1963–2020)