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
2005-12-25 13:54:25 C 08 24 57.79 -18 41 38.6 r E17
2006-03-03 02:23:41 C 05 16 47.66 -14 39 42.3 d 291
2006-03-03 02:30:52 C 05 16 47.10 -14 39 33.9 d 291
2006-03-03 02:36:23 C 05 16 46.68 -14 39 27.6 d 291
2006-03-25 02:36:29 C 04 44 56.46 -03 57 11.6 r 448
2006-03-25 02:55:18 C 04 44 55.24 -03 56 46.3 r 448
2006-03-25 03:11:28 C 04 44 54.21 -03 56 25.3 r 448
2007-09-30 10:32:23 C 06 41 17.36 +13 25 25.2 o H55
2007-09-30 10:41:00 C 06 41 17.52 +13 25 18.8 o H55
2007-09-30 10:49:38 C 06 41 17.66 +13 25 12.2 o H55
2007-12-03 08:15:59 C 05 21 00.05 -06 47 40.4 o 291
2007-12-03 08:21:29 C 05 20 59.39 -06 47 42.9 o 291
2007-12-03 08:26:52 C 05 20 58.74 -06 47 45.4 o 291
2008-10-18 09:00:06 C 06 19 14.54 +12 12 02.7 o 304
2008-10-18 09:02:30 C 06 19 13.44 +12 11 55.3 o 304
2008-10-18 09:04:52 C 06 19 12.37 +12 11 48.0 o 304
2008-10-18 09:07:13 C 06 19 11.28 +12 11 40.6 o 304
2008-10-18 09:09:37 C 06 19 10.21 +12 11 33.4 o 304
2008-10-18 09:11:58 C 06 19 09.12 +12 11 26.1 o 304
2008-10-18 09:14:11 C 06 19 08.03 +12 11 18.6 o 304
2008-10-18 09:16:44 C 06 19 06.95 +12 11 11.3 o 304
2008-10-18 09:19:07 C 06 19 05.87 +12 11 04.0 o 304
2008-10-18 09:21:29 C 06 19 04.79 +12 10 56.7 o 304
2008-10-18 09:23:51 C 06 19 03.71 +12 10 49.4 o 304
2008-10-18 09:26:14 C 06 19 02.62 +12 10 42.0 o 304
2008-10-24 09:09:14 C 05 18 28.45 +04 51 11.4 17.3 c 704
2008-10-24 09:25:47 C 05 18 21.76 +04 50 23.5 17.0 c 704
2008-10-24 09:27:19 C 05 18 21.39 +04 50 19.5 r 683
2008-10-24 09:42:15 C 05 18 15.10 +04 49 35.7 17.2 c 704
2008-10-24 09:46:30 C 05 18 13.60 +04 49 23.8 r 683
2008-10-24 09:58:47 C 05 18 08.43 +04 48 47.5 17.3 c 704
2008-10-24 10:05:41 C 05 18 05.79 +04 48 27.9 r 683
2008-10-25 08:41:41 C 05 09 21.51 +03 44 09.7 17.0 c 704
2008-10-25 08:58:17 C 05 09 14.99 +03 43 23.0 17.0 c 704
2008-10-25 09:14:51 C 05 09 08.50 +03 42 36.8 16.9 c 704
2008-10-25 09:31:31 C 05 09 01.98 +03 41 50.3 17.0 c 704
2008-10-25 09:48:04 C 05 08 55.51 +03 41 04.7 17.6 c 704
2008-10-26 08:40:11 C 05 00 21.46 +02 38 23.3 16.9 c 704
2008-10-26 08:40:24 C 05 00 21.33 +02 38 22.1 16.9 c 704
2008-10-26 08:56:49 C 05 00 15.14 +02 37 38.5 17.2 c 704
2008-10-26 08:57:02 C 05 00 15.06 +02 37 37.5 17.0 c 704
2008-10-26 09:13:32 C 05 00 08.84 +02 36 53.6 16.9 c 704
2008-10-26 09:13:44 C 05 00 08.70 +02 36 52.6 17.2 c 704
2008-10-26 09:30:15 C 05 00 02.48 +02 36 08.7 17.2 c 704
2008-10-26 09:30:27 C 05 00 02.37 +02 36 07.5 17.1 c 704
2008-10-26 09:47:09 C 04 59 56.10 +02 35 23.1 17.2 c 704
2008-10-26 09:47:21 C 04 59 55.93 +02 35 21.8 17.0 c 704
2008-10-27 08:42:50 C 04 51 37.86 +01 35 11.1 17.1 c 704
2008-10-27 08:59:32 C 04 51 31.74 +01 34 28.1 17.5 c 704
2008-10-27 09:16:23 C 04 51 25.58 +01 33 44.9 17.4 c 704
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)