2018 TR4

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar

Orbital Elements

Epoch (TDB)	2025-11-21 (JD 2461000.5)
Eccentricity (e)	0.1598652000
Semi-major axis (a)	1.0812229000 AU
Inclination (i)	19.68681000°
Long. of Asc. Node (Ω)	17.32717000°
Arg. of Perihelion (ω)	77.13187000°
Mean Anomaly (M)	58.01334000°
Mean Motion (n)	0.8766600900°/day
Perihelion dist (q)	0.90837300 AU
Aphelion dist (Q)	1.25407280 AU
Orbital Period	1.12427580 yr

Physical Parameters

H (abs. magnitude)	25.05
G (slope)	0.15

Orbit Solution

Source	MPC
Solution Date	—
RMS Residual	0.740″
Uncertainty	6
Orbit Type	Apollo
MOID	0.016045 AU
Observations Used	154
Radar Obs Used	1
Oppositions	1
Arc Total	—
First Observation Used	—
Last Observation Used	2018-10-13

Observations (164)

Date	Type	RA	Dec	Mag	Band	Observatory
2018-10-12 19:32:20	C	00 07 58.99	+44 48 35.0	–	V	246
2018-10-12 19:32:28	C	00 07 58.67	+44 48 39.8	–	V	246
2018-10-12 19:32:37	C	00 07 58.29	+44 48 44.5	–	V	246
2018-10-12 19:32:45	C	00 07 57.90	+44 48 49.9	–	V	246
2018-10-12 19:35:13	C	00 07 55.44	+44 50 42.6	–	q	C77
2018-10-12 20:18:48	C	00 05 50.81	+45 18 23.4	–	V	204
2018-10-12 20:20:55	C	00 05 44.79	+45 19 43.4	–	V	204
2018-10-12 20:23:31	C	00 05 37.37	+45 21 22.1	–	V	204
2018-10-12 20:25:35	C	00 05 31.44	+45 22 40.5	–	V	204
2018-10-12 20:27:38	C	00 05 25.58	+45 23 58.0	–	V	204
2018-10-13 05:02:39	V	23 40 32.19	+50 23 37.6	–	V	247
2018-10-13 05:02:39	v	1 248.2384	+40.4490	–	–	247
2018-10-13 05:32:41	V	23 38 55.76	+50 39 38.6	–	V	247
2018-10-13 05:32:41	v	1 248.2384	+40.4490	–	–	247

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Radar Observations (1)

Epoch (UTC)	Value	Sigma	Units	Freq (MHz)	Receiver	Transmitter
2018-10-12 03:07:00	-8677.5837	0.2	Hz	2380	-1	-1

Station codes

-1 Arecibo (305-m, 1963–2020)