Asteroids

2025AO3 help

Last update: 2026-03-17 23:26 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Amor

Perihelion (q)

1.091

Aphelion (Q)

1.861

Eccentricity (e)

0.261

Inclination (i)

11.2

deg

Orbit period (P)

655.0

Earth MOID

0.11694

U parameter

8.6

Next Earth close approach

Date

2077-01-08

Nominal distance (from Earth center)

0.12102

18104056

Maximum Brightness

22.5

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

17 - 40*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-01-08

Observatory

Calar Alto-Schmidt

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

1.475979

1-sigma variation

0.003880

Unit

Eccentricity (e)

Value

0.261144

1-sigma variation

0.001557

Unit

Inclination (i)

Value

11.1574

1-sigma variation

0.0545

Unit

Long. of Ascending Node (Ω)

Value

296.1263

1-sigma variation

0.0070

Unit

Arg. of Perihelion (ω)

Value

158.1976

1-sigma variation

0.0736

Unit

Mean Anomaly (M)

Value

291.23994

1-sigma variation

1.16174

Unit

Perihelion distance

Value

1.090536

1-sigma variation

Unit

Aphelion distance

Value

1.861422

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.799000

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.123106

1-sigma variation

Unit

MOID

Value

0.116940

1-sigma variation

Unit

Orbit Period

Value

654.9658

1-sigma variation

Unit

U parameter

Value

8.6

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.50576E-5	6.04041E-6	2.11489E-4	-2.59597E-5	1.05084E-4	-4.50567E-3
e	6.04041E-6	2.42406E-6	8.47982E-5	-1.03527E-5	4.00722E-5	-1.80633E-3
i	2.11489E-4	8.47982E-5	2.97246E-3	-3.67375E-4	1.56708E-3	-6.33336E-2
Ω	-2.59597E-5	-1.03527E-5	-3.67375E-4	4.88301E-5	-3.18332E-4	7.84285E-3
ω	1.05084E-4	4.00722E-5	1.56708E-3	-3.18332E-4	5.41667E-3	-3.40048E-2
M	-4.50567E-3	-1.80633E-3	-6.33336E-2	7.84285E-3	-3.40048E-2	1.34963E0

Date of computation: 2026-03-17 23:26 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

25.962

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

17 - 40*

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

[-]

Download this part as:

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

446

Unit

Source

[1]

Normalized RMS of residuals

Value

0.38477

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-01-08.003821

Unit

Source

[2]

Last Observation

Value

2025-01-10.086553

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

10 (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

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 2025AO3 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	1973-01-07 08:21	> 1 w	0.1321958	0.1164454	0.4871467
EARTH	1982-01-12 07:15	> 1 mo	0.1907587	0.1187387	0.7287586
EARTH	2025-01-08 01:48	56.6	0.1175392	0.1157484	0.0005970
EARTH	2077-01-08 23:10	> 1 w	0.1210181	0.1167458	0.2642771
EARTH	2120-01-09 12:23	> 1 w	0.1674107	0.1142062	1.7442140

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
10.32176494	6.51713375	0.11688195	MINIMUM
176.01075794	170.27378679	0.85010810	SADDLE
358.02196003	170.97510629	2.10706297	SADDLE
180.72677653	353.87160817	2.84354659	MAXIMUM

Download:

MOID Plots

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