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
2025-12-13 05:18:59 C 03 23 57.325 -08 10 17.76 V G96
2025-12-13 05:27:09 C 03 23 56.753 -08 10 16.82 V G96
2025-12-13 05:35:21 C 03 23 56.188 -08 10 15.89 V G96
2025-12-13 05:43:33 C 03 23 55.594 -08 10 14.99 V G96
2025-12-13 07:52:29 C 03 23 47.152 -08 09 58.33 X F52
2025-12-13 08:09:13 C 03 23 45.982 -08 09 56.43 X F52
2025-12-13 08:42:43 C 03 23 43.637 -08 09 52.59 X F52
2025-12-17 08:13:51 C 03 18 00.704 -07 55 08.72 X F51
2025-12-17 08:33:38 C 03 17 59.592 -07 55 04.92 X F51
2025-12-17 08:53:25 C 03 17 58.477 -07 55 01.08 X F51
2025-12-17 09:13:11 C 03 17 57.359 -07 54 57.25 X F51
2025-12-26 05:18:37 C 03 09 31.432 -07 00 28.98 X F51
2025-12-26 05:37:15 C 03 09 30.876 -07 00 23.24 X F51
2025-12-26 05:55:54 C 03 09 30.313 -07 00 17.48 X F51
2025-12-26 06:14:34 C 03 09 29.755 -07 00 11.75 X F51
2026-01-12 05:32:41 C 03 06 14.153 -04 28 35.54 X F51
2026-01-12 05:50:48 C 03 06 14.259 -04 28 28.27 X F51
2026-01-12 06:08:56 C 03 06 14.384 -04 28 20.82 X F51
2026-01-12 06:27:08 C 03 06 14.482 -04 28 13.28 X F51
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)