2025 YB4

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS

Orbital Elements

Epoch (TDB)	2025-11-21 (JD 2461000.5)
Eccentricity (e)	0.5835656739 ± 1.04e-03
Semi-major axis (a)	1.6919694975 AU ± 3.45e-03
Inclination (i)	4.38095638° ± 7.21e-03
Long. of Asc. Node (Ω)	269.95394256° ± 4.77e-04
Arg. of Perihelion (ω)	100.51406264° ± 2.43e-03
Mean Anomaly (M)	8.10764306° ± 3.85e-02
Mean Motion (n)	0.4478406197°/day ± 1.37e-03
Perihelion dist (q)	0.70459418 AU ± 2.27e-03
Aphelion dist (Q)	2.67934482 AU ± 5.73e-03
Orbital Period	2.20084164 yr ± 6.73e-03

Physical Parameters

H (abs. magnitude)	28.94
G (slope)	0.15

Orbit Solution

Source	IAA
Solution Date	2026-06-03
RMS Residual	0.856″
Uncertainty	2
Orbit Type	Apollo
MOID	0.003512 AU
Observations Used	17
Oppositions	1
Arc Total	2025-2025
First Observation Used	2025-12-21
Last Observation Used	2025-12-23

Observations (17)

Date	Type	RA	Dec	Mag	Band	Observatory
2025-12-21 06:04:23	C	04 54 22.201	+26 54 22.10	–	V	V00
2025-12-21 06:12:27	C	04 54 37.008	+26 52 22.22	–	V	V00
2025-12-21 06:20:30	C	04 54 51.617	+26 50 23.57	–	V	V00
2025-12-21 06:28:33	C	04 55 06.445	+26 48 22.97	–	V	V00
2025-12-21 07:12:47	C	04 56 23.813	+26 37 36.91	–	V	I52
2025-12-21 07:16:26	C	04 56 30.124	+26 36 44.10	–	V	I52
2025-12-21 07:20:07	C	04 56 36.510	+26 35 51.36	–	V	I52
2025-12-21 07:23:48	C	04 56 42.774	+26 34 59.12	–	V	I52
2025-12-21 09:04:38	C	04 59 30.930	+26 11 20.98	–	V	I52
2025-12-21 09:08:39	C	04 59 37.342	+26 10 25.93	–	V	I52
2025-12-21 09:12:42	C	04 59 43.890	+26 09 30.20	–	V	I52
2025-12-21 09:16:47	C	04 59 50.464	+26 08 34.44	–	V	I52
2025-12-22 03:03:29	C	05 21 46.42	+23 12 21.5	–	V	H21
2025-12-22 03:07:46	C	05 21 49.74	+23 11 51.3	–	V	H21
2025-12-22 03:12:03	C	05 21 53.04	+23 11 20.8	–	V	H21
2025-12-23 08:20:36	C	05 38 18.157	+20 41 59.03	–	V	V06
2025-12-23 08:25:56	C	05 38 19.900	+20 41 39.19	–	V	V06