504711 (2009 SP171)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3559642830 ± 1.84e-08
Semi-major axis (a)1.3556476946 AU ± 3.30e-09
Inclination (i)25.62453773° ± 4.95e-06
Long. of Asc. Node (Ω)223.07609229° ± 3.97e-06
Arg. of Perihelion (ω)285.20342096° ± 8.49e-06
Mean Anomaly (M)329.47632819° ± 8.98e-06
Mean Motion (n)0.6244418711°/day ± 2.28e-09
Perihelion dist (q)0.87308553 AU ± 2.50e-08
Aphelion dist (Q)1.83820985 AU ± 2.53e-08
Orbital Period1.57841158 yr ± 5.77e-09
Physical Parameters
H (abs. magnitude)19.27
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.281″
Uncertainty0
Orbit TypeApollo
MOID0.060582 AU
Observations Used265
Oppositions7
Arc Total2007-2025
First Observation Used2009-09-28
Last Observation Used2025-10-30
Observations (293)
Date Type RA Dec Mag Band Observatory
2018-06-13 12:02:49 C 16 58 56.95 +27 06 38.8 U T05
2018-06-13 12:12:11 C 16 58 56.31 +27 06 39.3 U T05
2018-06-13 12:23:43 C 16 58 55.30 +27 06 40.9 U T05
2018-06-18 06:34:04 C 16 51 22.81 +27 10 48.9 U I41
2018-06-18 07:04:20 C 16 51 20.85 +27 10 47.0 U I41
2018-06-18 07:36:59 C 16 51 18.76 +27 10 44.9 U I41
2018-06-18 08:09:42 C 16 51 16.66 +27 10 42.7 U I41
2018-06-22 05:51:29 C 16 46 11.59 +26 58 35.1 U G96
2018-06-22 05:58:55 C 16 46 11.18 +26 58 33.8 U G96
2018-06-22 06:06:22 C 16 46 10.79 +26 58 32.3 U G96
2018-06-22 06:13:50 C 16 46 10.38 +26 58 31.0 U G96
2018-06-25 09:47:44 C 16 42 45.847 +26 40 33.40 U F51
2018-06-25 10:04:22 C 16 42 45.101 +26 40 28.36 U F51
2018-06-25 10:21:06 C 16 42 44.321 +26 40 23.65 U F51
2018-06-25 10:37:54 C 16 42 43.577 +26 40 18.75 U F51
2018-07-07 06:21:26 C 16 35 03.47 +24 45 23.4 U G96
2018-07-07 06:29:07 C 16 35 03.31 +24 45 19.7 U G96
2018-07-07 06:36:48 C 16 35 03.21 +24 45 15.4 U G96
2018-07-07 06:44:28 C 16 35 03.05 +24 45 11.6 U G96
2020-08-08 06:57:57 C 23 39 22.16 +39 32 07.3 u H21
2020-08-08 07:07:28 C 23 39 21.89 +39 32 11.2 u H21
2020-08-08 07:17:49 C 23 39 21.61 +39 32 15.4 u H21
2020-09-22 07:45:24 C 22 36 33.618 +35 57 29.51 U F51
2020-09-22 08:20:33 C 22 36 31.165 +35 56 56.43 U F51
2020-09-22 08:38:10 C 22 36 29.932 +35 56 39.67 U F51
2020-10-13 03:51:35 C 22 12 58.75 +25 55 10.3 V G96
2020-10-13 03:59:01 C 22 12 58.56 +25 54 59.9 V G96
2020-10-13 04:06:25 C 22 12 58.35 +25 54 49.9 V G96
2020-10-13 04:13:50 C 22 12 58.15 +25 54 39.7 V G96
2020-10-14 05:13:38 C 22 12 24.359 +25 20 34.63 U F52
2020-10-14 05:31:15 C 22 12 23.946 +25 20 10.78 U F52
2020-10-14 05:48:45 C 22 12 23.500 +25 19 47.01 U F52
2020-10-14 06:06:15 C 22 12 23.054 +25 19 23.22 U F52
2023-07-14 06:24:47 C 21 43 29.42 +34 14 59.7 u H21
2023-07-14 06:42:54 C 21 43 28.65 +34 15 07.6 u H21
2023-07-14 06:46:56 C 21 43 28.46 +34 15 09.6 u H21
2023-11-07 03:25:35 C 20 50 25.796 +08 34 30.29 V V06
2023-11-07 03:37:01 C 20 50 26.484 +08 34 24.20 V V06
2023-11-07 03:48:27 C 20 50 27.143 +08 34 17.72 V V06
2025-10-30 10:55:42 C 08 18 05.713 -01 32 55.43 V G96
2025-10-30 11:03:07 C 08 18 07.052 -01 33 16.09 V G96
2025-10-30 11:10:31 C 08 18 08.359 -01 33 36.43 V G96
2025-10-30 11:17:54 C 08 18 09.713 -01 33 57.06 V G96