2021 SF4

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2160857411 ± 1.16e-07
Semi-major axis (a)1.3087856829 AU ± 5.09e-09
Inclination (i)12.29557328° ± 1.23e-05
Long. of Asc. Node (Ω)199.92131899° ± 5.94e-06
Arg. of Perihelion (ω)225.76966653° ± 6.10e-05
Mean Anomaly (M)237.38315448° ± 3.79e-05
Mean Motion (n)0.6582781999°/day ± 3.84e-09
Perihelion dist (q)1.02597576 AU ± 1.51e-07
Aphelion dist (Q)1.59159561 AU ± 1.52e-07
Orbital Period1.49727924 yr ± 8.74e-09
NGA Modelr2
A2-2.12221369e-13 ± 3.09e-14 AU/d²
Physical Parameters
H (abs. magnitude)24.51
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.228″
Uncertainty0
Orbit TypeAmor
MOID0.075109 AU
Observations Used47
Oppositions2
Arc Total2018-2024
First Observation Used2018-10-16
Last Observation Used2024-10-07
Observations (49)
Date Type RA Dec Mag Band Observatory
2018-10-16 09:50:46 C 00 52 48.835 -00 03 04.08 V F52
2018-10-16 10:26:52 C 00 52 53.559 -00 06 53.12 V F52
2018-10-18 06:20:51 C 01 00 07.79 -04 50 09.6 W W84
2018-11-06 05:50:16 C 02 41 54.753 -46 57 29.12 V W84
2018-11-06 05:52:14 C 02 41 55.167 -46 57 34.83 V W84
2021-09-29 07:54:54 C 00 53 41.983 +30 16 28.25 U F52
2021-09-29 08:12:16 C 00 53 43.750 +30 15 54.01 U F52
2021-09-29 08:46:54 C 00 53 47.239 +30 14 45.56 U F52
2021-09-29 14:02:53 C 00 54 18.596 +30 03 43.91 V F51
2021-09-29 14:04:04 C 00 54 18.735 +30 03 41.21 V F51
2021-09-30 12:20:07 C 00 57 02.147 +29 15 17.03 U F51
2021-09-30 12:36:57 C 00 57 03.885 +29 14 37.92 U F51
2021-09-30 12:53:38 C 00 57 05.629 +29 13 58.84 U F51
2021-09-30 13:10:21 C 00 57 07.385 +29 13 19.48 U F51
2021-10-03 21:21:10 C 01 07 44.33 +25 41 59.4 V L01
2021-10-03 21:24:33 C 01 07 44.78 +25 41 49.6 V L01
2021-10-03 21:27:55 C 01 07 45.20 +25 41 39.6 V L01
2021-10-04 06:49:34 C 01 09 06.945 +25 13 21.86 U F51
2021-10-04 06:57:00 C 01 09 07.891 +25 12 59.86 U F51
2021-10-04 07:04:29 C 01 09 08.854 +25 12 37.41 U F51
2021-10-04 07:11:53 C 01 09 09.808 +25 12 15.02 U F51
2021-10-08 06:28:44 C 01 23 41.35 +19 25 11.9 V G96
2021-10-08 06:36:14 C 01 23 42.40 +19 24 40.2 V G96
2021-10-08 06:58:07 C 01 23 45.51 +19 23 08.7 V G96
2021-10-08 07:05:36 C 01 23 46.55 +19 22 37.3 V G96
2021-10-11 11:52:31 C 01 37 06.920 +13 21 37.55 U F51
2021-10-11 12:09:20 C 01 37 09.588 +13 20 09.32 U F51
2021-10-11 12:42:58 C 01 37 14.956 +13 17 12.84 U F51
2021-10-11 15:18:43 C 01 37 48.45 +13 03 20.7 V D29
2021-10-11 15:39:04 C 01 37 51.74 +13 01 34.1 V D29
2021-10-11 15:59:26 C 01 37 55.00 +12 59 47.0 V D29
2021-10-16 03:33:33 C 01 59 24.19 +02 24 34.0 u 807
2021-10-16 03:38:00 C 01 59 25.07 +02 24 05.1 u 807
2021-10-16 03:42:33 C 01 59 25.91 +02 23 33.9 u 807
2021-10-26 03:21:16 C 02 56 40.45 -24 59 49.6 u 807
2021-10-26 03:30:20 C 02 56 42.54 -25 00 49.2 u 807
2021-10-26 03:39:24 C 02 56 44.60 -25 01 47.0 u 807
2024-09-13 10:57:24 C 00 53 33.534 +37 28 40.66 V F51
2024-09-13 11:14:30 C 00 53 35.125 +37 28 37.20 V F51
2024-09-29 12:57:25 C 01 46 22.947 +31 17 07.49 X F51
2024-09-29 12:59:19 C 01 46 23.243 +31 17 03.43 X F51
2024-09-29 13:16:02 C 01 46 25.789 +31 16 28.95 X F51
2024-09-29 13:34:37 C 01 46 28.697 +31 15 49.73 X F51
2024-09-29 13:36:29 C 01 46 29.001 +31 15 45.54 X F51
2024-09-29 13:53:08 C 01 46 31.569 +31 15 10.75 X F51
2024-09-29 13:55:01 C 01 46 31.876 +31 15 06.59 X F51
2024-10-07 10:04:25 C 02 23 24.009 +22 08 43.22 X F52
2024-10-07 10:24:25 C 02 23 27.914 +22 07 25.88 X F52
2024-10-07 10:44:33 C 02 23 31.822 +22 06 08.03 X F52