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
2004-05-30 12:22:35 C 13 07 26.65 -35 15 49.1 r E17
2004-06-21 09:49:33 C 13 22 44.98 -28 41 57.1 r 428
2004-06-21 09:53:59 C 13 22 45.16 -28 41 54.8 r 428
2004-06-21 09:58:25 C 13 22 45.33 -28 41 53.1 r 428
2005-05-04 03:34:49 C 07 54 09.40 +03 55 19.8 r 703
2005-05-04 03:46:22 C 07 54 12.86 +03 55 03.2 r 703
2005-05-04 03:58:00 C 07 54 16.44 +03 54 45.7 r 703
2005-06-01 10:22:17 C 10 31 31.99 -08 20 06.7 r E12
2005-06-01 10:33:16 C 10 31 33.73 -08 20 16.8 r E12
2005-06-01 10:44:13 C 10 31 35.53 -08 20 23.5 r E12
2005-06-01 10:55:12 C 10 31 37.40 -08 20 32.2 r E12
2005-06-01 11:13:13 C 10 31 40.39 -08 20 46.1 r E12
2005-06-01 11:14:28 C 10 31 40.62 -08 20 46.5 r E12
2005-06-01 11:15:45 C 10 31 40.79 -08 20 47.3 r E12
2005-06-01 11:17:00 C 10 31 41.03 -08 20 47.9 r E12
2005-07-01 09:09:23 C 12 09 06.42 -14 53 49.8 r 474
2005-07-01 09:14:56 C 12 09 07.14 -14 53 52.7 r 474
2005-07-01 09:20:28 C 12 09 07.72 -14 53 54.6 r 474
2011-07-01 10:09:09 C 00 40 29.64 +00 40 39.4 u 703
2011-07-01 10:18:21 C 00 40 31.00 +00 40 51.3 u 703
2011-07-01 10:27:32 C 00 40 32.41 +00 41 03.3 u 703
2011-07-28 01:15:34 C 02 56 47.74 +18 58 37.8 u C01
2011-07-28 01:16:26 C 02 56 48.11 +18 58 39.1 u C01
2011-07-28 01:17:21 C 02 56 48.25 +18 58 41.2 u C01
2011-07-28 01:18:14 C 02 56 48.54 +18 58 42.6 u C01
2012-07-18 16:10:42 C 22 17 11.523 -23 53 29.20 r E12
2012-07-18 16:29:59 C 22 17 10.491 -23 53 34.21 r E12
2012-07-18 16:49:20 C 22 17 09.432 -23 53 39.16 r E12
2012-07-18 17:08:16 C 22 17 08.402 -23 53 43.97 r E12
2012-07-23 01:51:01 C 22 10 54.06 -24 23 30.4 u I39
2012-07-23 01:59:08 C 22 10 53.42 -24 23 33.2 u I39
2012-07-23 02:26:36 C 22 10 51.33 -24 23 43.4 u I39
2012-07-23 02:36:58 C 22 10 50.53 -24 23 46.6 u I39
2012-08-13 12:18:55 C 20 33 10.331 -27 01 39.05 r E12
2012-08-13 12:36:00 C 20 33 03.722 -27 01 38.00 r E12
2012-08-13 12:52:27 C 20 32 57.349 -27 01 36.83 r E12
2012-08-13 13:08:50 C 20 32 51.012 -27 01 35.57 r E12
2012-08-16 13:39:58 C 20 03 13.975 -26 41 10.79 r E12
2012-08-16 13:58:20 C 20 03 05.496 -26 41 00.70 r E12
2012-08-16 14:16:39 C 20 02 57.082 -26 40 50.48 r E12
2012-08-17 22:01:50 C 19 48 23.49 -26 20 39.3 r G44
2012-08-17 22:17:19 C 19 48 15.88 -26 20 28.6 r G44
2012-08-17 22:32:15 C 19 48 08.53 -26 20 18.3 r G44
2012-08-19 21:08:38 C 19 24 50.92 -25 35 42.6 u J93
2012-08-19 21:11:09 C 19 24 49.56 -25 35 39.5 u J93
2012-08-19 21:13:43 C 19 24 48.23 -25 35 36.7 u J93
2012-08-23 09:02:56 C 18 38 41.433 -23 16 42.10 t F65
2012-08-23 09:05:23 C 18 38 39.987 -23 16 36.60 t F65
2012-08-31 01:23:14 C 16 53 14.99 -14 09 58.9 u H21
2012-08-31 01:25:39 C 16 53 13.65 -14 09 50.4 u H21
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)