Asteroids

2022OC4 help

Last update: 2025-09-10 00:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.916

Aphelion (Q)

1.765

Eccentricity (e)

0.316

Inclination (i)

0.2

deg

Orbit period (P)

567.0

Earth MOID

0.00012

U parameter

7.2

Next Earth close approach

Date

2036-07-24

Nominal distance (from Earth center)

0.183

27375776

Maximum Brightness

26.5

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

27.4

mag

Diameter

9 - 20*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2022-07-28

Observatory

Pan-STARRS 2, Haleakala

ORBIT VISUALISATION TOOLS

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Long. of Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion distance
Aphelion distance
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period
U parameter

Value

1-sigma variation

Unit

Epoch

Value

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.340595

1-sigma variation

0.000344

Unit

Eccentricity (e)

Value

0.316395

1-sigma variation

0.000204

Unit

Inclination (i)

Value

0.1928

1-sigma variation

0.0001

Unit

Long. of Ascending Node (Ω)

Value

135.9030

1-sigma variation

0.0004

Unit

Arg. of Perihelion (ω)

Value

234.9062

1-sigma variation

0.0026

Unit

Mean Anomaly (M)

Value

13.32215

1-sigma variation

0.28130

Unit

Perihelion distance

Value

0.916438

1-sigma variation

Unit

Aphelion distance

Value

1.764753

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.483667

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.007811

1-sigma variation

Unit

MOID

Value

0.000125

1-sigma variation

Unit

Orbit Period

Value

566.9503

1-sigma variation

Unit

U parameter

Value

7.2

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.18535E-7	7.03907E-8	3.72628E-8	1.27237E-7	-8.94327E-7	-9.68499E-5
e	7.03907E-8	4.18007E-8	2.21281E-8	7.55582E-8	-5.31074E-7	-5.75131E-5
i	3.72628E-8	2.21281E-8	1.17477E-8	3.92734E-8	-2.80408E-7	-3.04457E-5
Ω	1.27237E-7	7.55582E-8	3.92734E-8	1.63226E-7	-9.86609E-7	-1.03960E-4
ω	-8.94327E-7	-5.31074E-7	-2.80408E-7	-9.86609E-7	6.77749E-6	7.30713E-4
M	-9.68499E-5	-5.75131E-5	-3.04457E-5	-1.03960E-4	7.30713E-4	7.91317E-2

Date of computation: 2025-09-10 00:30 UTC

Note: The ASCII file is in a format suitable for Orbfit input.

Download ASCII file:

Physical properties

Rotation Period
Quality
Amplitude
Rotation Direction
Spinvector L
Spinvector B

Rotational properties

Value

Unit

Source

Rotation Period

Value

Unit

Source

[-]

Quality

Value

Unit

Source

[-]

Amplitude

Value

Unit

mag

Source

[-]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

Unit

Source

[-]

Spinvector B

Value

Unit

Source

[-]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

Unit

Source

[-]

Taxonomy (all)

Value

Unit

Source

[-]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

27.403

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

9 - 20*

Unit

Source

[2]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

Unit

mag

Source

[-]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Unit

Source

[-]

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Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

Unit

Source

[1]

Unobserved

Value

1139

Unit

Source

[1]

Normalized RMS of residuals

Value

0.502919

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2022-07-28.32772

Unit

Source

[2]

Last Observation

Value

2022-08-09.116665

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

36 (1)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

Unit

Source

[-]

Last Observation

Value

Unit

Source

[-]

Delay (Discarded)

Value

0 (0)

Unit

Source

[-]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[-]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Close Approaches for 2022OC4 from 1950 to 2125

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1961-11-24 04:14	> 1 mo	0.0571912	0.0031958	0.3748855
EARTH	1972-07-31 16:37	> 1 mo	0.0699302	0.0002323	0.9775820
EARTH	1986-09-16 23:43	> 1 mo	0.0800474	0.0035580	0.1610262
EARTH	2000-11-20 02:15	> 1 d	0.0192716	0.0032347	0.0374100
EARTH	2011-10-01 05:54	> 1 w	0.0827122	0.0800971	0.0008738
EARTH	2022-08-09 00:02	< 1 min	0.0103307	0.0103126	0.0000060
EARTH	2036-07-24 10:39	> 1 d	0.1829958	0.0823725	0.0335411
EARTH	2039-12-02 18:39	> 1 d	0.1320210	0.0137159	0.0395376
MARS	2050-03-18 10:15	> 1 d	0.0478794	0.0142828	0.0245839
EARTH	2053-11-17 20:20	> 1 d	0.0088574	0.0032411	0.0304804
EARTH	2070-07-30 14:11	> 1 mo	0.0871616	0.0006821	2.6635383
EARTH	2073-11-24 21:14	> 1 mo	0.0411266	0.0032244	2.3976261
EARTH	2090-08-23 22:43	> 1 mo	0.0502631	0.0007471	10.3847044
EARTH	2107-07-27 08:10	> 1 mo	0.1570582	0.0005345	6.8740962
EARTH	2110-11-24 14:09	> 1 mo	0.0255692	0.0033283	10.0586607
EARTH	2124-08-05 05:24	> 1 mo	0.0468993	0.0011329	105.2309840

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
320.52351931	216.18717605	0.00018257	MINIMUM
33.87895518	315.06440437	0.00321081	MINIMUM
356.95500426	265.36956631	0.08433656	SADDLE
178.41452271	86.90408096	0.76550113	SADDLE
356.95286901	85.36391092	1.91538481	SADDLE
178.41021902	266.90004558	2.76517525	MAXIMUM

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MOID Plots

Click on the images to zoom-in and zoom-out

Level lines of the squared distance function

2022OC4

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2087-11-20.090	83644.090	-3.357	0.56 ± 0.000	1.27E8	3.98E-11	3.62E-2	-11.83
2089-11-19.291	84374.291	0.266	0.93 ± 0.000	8.44E7	1.46E-8	3.63E-2	-9.28
2096-11-12.816	86924.816	-1.656	1.56 ± 0.014	2.08E6	1.00E-7	3.60E-2	-8.49
2096-11-30.846	86942.846	-1.275	1.31 ± 0.002	2.08E6	2.25E-7	3.61E-2	-8.13
2097-08-09.215	87194.215	-1.329	0.67 ± 0.008	4.68E7	1.25E-8	3.62E-2	-9.39
2097-08-10.899	87195.899	-1.682	1.56 ± 0.007	2.88E6	6.78E-8	3.61E-2	-8.66
2100-11-20.109	88392.109	0.266	1.20 ± 0.000	3.93E8	2.77E-9	3.61E-2	-10.07
2105-11-13.267	90211.267	-0.399	1.84 ± 0.003	1.90E7	7.32E-9	3.62E-2	-9.67
2110-11-12.673	92036.673	-0.364	1.77 ± 0.002	1.15E7	3.64E-8	3.63E-2	-9.00
2111-11-22.639	92411.639	0.311	1.53 ± 0.016	1.58E8	5.02E-9	3.63E-2	-9.86
2113-11-14.097	93134.097	-0.400	0.76 ± 0.002	2.61E6	4.97E-7	3.62E-2	-7.88
2113-11-14.250	93134.250	-0.401	1.85 ± 0.002	2.95E6	3.78E-8	3.62E-2	-9.00
2119-08-13.269	95232.269	-1.701	1.14 ± 0.003	1.40E8	2.01E-9	3.62E-2	-10.30
2119-11-20.228	95331.228	0.277	0.97 ± 0.016	1.60E8	7.72E-9	3.63E-2	-9.71


Based on 36 optical observations (of which 1 are rejected as outliers) from 2022/07/28.328 to 2022/08/09.117.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.85 and 1.85 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
AstOD software version= 4.0, Date of computation=20250805 130500.123 UTC.

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