Asteroids

2025OC13 help

Last update: 2026-08-26 14:46 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.466

Aphelion (Q)

4.395

Eccentricity (e)

0.808

Inclination (i)

16.9

deg

Orbit period (P)

1384.3

Earth MOID

0.04731

U parameter

9.0

Next Earth close approach

Date

2059-07-20

Nominal distance (from Earth center)

0.05534

8278884

Maximum Brightness

20.9

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

24.4

mag

Diameter

40 - 80*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-07-29

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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

2.430828

1-sigma variation

0.036805

Unit

Eccentricity (e)

Value

0.808221

1-sigma variation

0.003422

Unit

Inclination (i)

Value

16.9263

1-sigma variation

0.1015

Unit

Long. of Ascending Node (Ω)

Value

127.1772

1-sigma variation

0.0020

Unit

Arg. of Perihelion (ω)

Value

68.2641

1-sigma variation

0.0148

Unit

Mean Anomaly (M)

Value

96.85579

1-sigma variation

2.23264

Unit

Perihelion distance

Value

0.466182

1-sigma variation

Unit

Aphelion distance

Value

4.395475

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.335961

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.187453

1-sigma variation

Unit

MOID

Value

0.047315

1-sigma variation

Unit

Orbit Period

Value

1384.2990

1-sigma variation

Unit

U parameter

Value

9.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.35462E-3	1.25929E-4	3.73430E-3	7.25724E-5	5.33159E-4	-8.21726E-2
e	1.25929E-4	1.17067E-5	3.47174E-4	6.74707E-6	4.95410E-5	-7.63896E-3
i	3.73430E-3	3.47174E-4	1.03054E-2	2.00314E-4	1.45983E-3	-2.26525E-1
Ω	7.25724E-5	6.74707E-6	2.00314E-4	3.89387E-6	2.83350E-5	-4.40229E-3
ω	5.33159E-4	4.95410E-5	1.45983E-3	2.83350E-5	2.19041E-4	-3.23434E-2
M	-8.21726E-2	-7.63896E-3	-2.26525E-1	-4.40229E-3	-3.23434E-2	4.98468E0

Date of computation: 2026-08-26 14:46 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

24.371

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

40 - 80*

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

395

Unit

Source

[1]

Normalized RMS of residuals

Value

0.894397

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-07-29.293287

Unit

Source

[2]

Last Observation

Value

2025-08-01.397002

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

18 (0)

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

Filters

Initial Date: *

Final Date: *

Normalised Only accepted

Max residual (arcsec):

* - these fields are required

Plot

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Note: Ephemerides requests are limited to a maximum of 1000 points and a final date not exceeding 2040/12/31 00:00.

Close Approaches for 2025OC13 from 1950 to 2126

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	2013-12-26 01:55	> 1 mo	0.1804206	0.1602743	0.7570905
EARTH	2025-07-18 09:08	2.1	0.0796293	0.0785186	0.0003702
EARTH	2059-07-20 15:01	> 1 mo	0.0553409	0.0055538	4.3534017
EARTH	2074-07-14 06:10	> 1 w	0.1732104	0.0168234	0.2180816
EARTH	2089-07-12 17:45	> 1 mo	0.1902558	0.0000654	4.6862037
EARTH	2123-07-12 15:25	> 1 mo	0.1824454	0.0360561	16.7675679

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
44.47029131	194.56473194	0.04731469	MINIMUM
319.63047725	355.24920948	0.14299710	MINIMUM
3.23366302	98.31948167	0.56883474	SADDLE
2.20607045	275.04183148	1.45299856	SADDLE
180.51966213	270.55068181	3.44347469	SADDLE
179.92350573	90.35028120	5.36515674	MAXIMUM

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MOID Plots

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