171576 (1999 VP11)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5836605346 ± 1.64e-08
Semi-major axis (a)1.0857331459 AU ± 8.70e-10
Inclination (i)17.27622291° ± 2.88e-06
Long. of Asc. Node (Ω)208.06025056° ± 1.58e-06
Arg. of Perihelion (ω)61.76358487° ± 2.22e-06
Mean Anomaly (M)99.66941613° ± 2.85e-06
Mean Motion (n)0.8712195884°/day ± 1.05e-09
Perihelion dist (q)0.45203356 AU ± 1.78e-08
Aphelion dist (Q)1.71943273 AU ± 1.78e-08
Orbital Period1.13131786 yr ± 1.36e-09
Physical Parameters
H (abs. magnitude)18.68
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.312″
Uncertainty0
Orbit TypeApollo
MOID0.003011 AU
Observations Used525
Radar Obs Used6
Gaia Obs Used9
Oppositions2
Arc Total1999-2026
First Observation Used1999-11-07
Last Observation Used2026-01-12
Observations (569)
Date Type RA Dec Mag Band Observatory
1999-11-07 07:27:38 C 04 52 56.12 -01 45 55.3 18.3 a 704
1999-11-07 07:41:51 C 04 52 53.48 -01 46 14.7 18.9 a 704
1999-11-07 07:51:53 C 04 52 51.57 -01 46 27.4 18.2 a 704
1999-11-07 08:15:53 C 04 52 47.15 -01 46 58.0 18.5 a 704
1999-11-07 08:29:46 C 04 52 44.58 -01 47 15.7 19.1 a 704
1999-11-07 08:39:48 C 04 52 42.66 -01 47 28.9 18.9 a 704
1999-11-07 08:53:41 C 04 52 40.06 -01 47 46.6 19.5 a 704
1999-11-07 09:03:47 C 04 52 38.15 -01 47 59.1 18.3 a 704
1999-11-07 09:17:40 C 04 52 35.62 -01 48 17.2 19.1 a 704
1999-11-08 07:44:36 C 04 48 32.67 -02 16 23.1 18.7 a 704
1999-11-08 08:08:09 C 04 48 28.25 -02 16 52.7 18.0 a 704
1999-11-08 08:08:19 C 04 48 28.24 -02 16 52.0 18.7 a 704
1999-11-08 08:31:17 C 04 48 23.93 -02 17 20.2 18.1 a 704
1999-11-08 08:31:27 C 04 48 23.93 -02 17 21.4 18.1 a 704
1999-11-08 08:31:37 C 04 48 23.96 -02 17 20.0 18.3 a 704
1999-11-08 08:54:25 C 04 48 19.70 -02 17 49.5 18.5 a 704
1999-11-08 08:54:35 C 04 48 19.63 -02 17 48.8 18.4 a 704
1999-11-08 08:54:46 C 04 48 19.61 -02 17 49.9 18.8 a 704
1999-11-08 09:17:37 C 04 48 15.56 -02 18 18.1 18.7 a 704
1999-11-08 09:17:58 C 04 48 15.36 -02 18 18.9 18.9 a 704
1999-11-09 05:42:29 C 04 44 36.78 -02 42 56.0 853
1999-11-09 05:43:39 C 04 44 36.56 -02 42 57.5 853
1999-11-09 05:44:45 C 04 44 36.37 -02 42 58.5 853
1999-11-09 07:09:52 C 04 44 20.64 -02 44 40.9 a 704
1999-11-09 07:30:38 C 04 44 16.80 -02 45 04.6 a 704
1999-11-09 07:51:24 C 04 44 12.97 -02 45 30.1 a 704
1999-11-09 16:32:32 C 04 42 39.82 -02 55 43.1 z 402
1999-11-09 16:34:20 C 04 42 39.51 -02 55 44.8 z 402
1999-11-09 16:36:09 C 04 42 39.16 -02 55 46.8 z 402
1999-11-09 16:37:58 C 04 42 38.79 -02 55 49.2 z 402
1999-11-10 06:46:46 C 04 40 08.79 -03 12 05.9 853
1999-11-10 06:54:52 C 04 40 07.31 -03 12 15.3 853
1999-11-10 07:01:14 C 04 40 06.14 -03 12 23.1 853
1999-11-10 07:07:38 C 04 40 04.99 -03 12 29.4 853
1999-11-10 07:16:15 C 04 40 03.25 -03 12 40.5 18.7 a 704
1999-11-10 07:39:58 C 04 39 58.92 -03 13 07.1 18.2 a 704
1999-11-10 08:03:30 C 04 39 54.65 -03 13 34.3 18.4 a 704
1999-11-10 08:27:02 C 04 39 50.32 -03 14 00.8 18.4 a 704
1999-11-10 08:50:30 C 04 39 46.05 -03 14 27.6 18.8 a 704
1999-11-10 11:35:02 C 04 39 17.79 -03 17 06.9 c 474
1999-11-10 11:36:43 C 04 39 17.44 -03 17 08.7 c 474
1999-11-10 11:38:11 C 04 39 17.23 -03 17 09.8 c 474
1999-11-10 11:39:39 C 04 39 16.96 -03 17 11.5 c 474
1999-11-10 11:42:26 C 04 39 16.43 -03 17 15.2 c 474
1999-11-11 07:38:35 C 04 35 45.90 -03 39 45.8 853
1999-11-11 07:41:21 C 04 35 45.37 -03 39 48.5 853
1999-11-11 07:44:04 C 04 35 44.88 -03 39 51.8 853
1999-11-12 12:39:55 C 04 30 43.53 -04 09 59.1 c 474
1999-11-12 12:45:35 C 04 30 42.58 -04 10 04.9 c 474
1999-11-12 12:49:40 C 04 30 41.83 -04 10 08.9 c 474
Radar Observations (6)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2017-10-24 05:20:00 -1000713.203 3 Hz 8560 -14 -14
2017-10-24 05:30:00 -1002732.54 3 Hz 8560 -14 -14
2017-10-24 05:40:00 26252169.71 2 us 8560 -14 -14
2017-10-24 06:00:00 26393298.09 0.5 us 8560 -14 -14
2017-10-25 05:20:00 36832306.817 1 us 8560 -14 -14
2017-10-26 04:00:00 47633179 1 us 8560 -14 -14
Station codes
-14 DSS-14 Goldstone (70-m)