Asteroids

2025OA4 help

Last update: 2025-07-29 13:15 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Amor

Perihelion (q)

1.056

Aphelion (Q)

1.482

Eccentricity (e)

0.168

Inclination (i)

25.2

deg

Orbit period (P)

522.1

Earth MOID

0.04475

U parameter

8.8

Next Earth close approach

Date

2035-07-30

Nominal distance (from Earth center)

0.04436

6635991

Maximum Brightness

18.8

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

25.2

mag

Diameter

25 - 60*

Taxonomic type

Rotation period (T)

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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.268954

1-sigma variation

0.003122

Unit

Eccentricity (e)

Value

0.167616

1-sigma variation

0.001873

Unit

Inclination (i)

Value

25.1514

1-sigma variation

0.1075

Unit

Long. of Ascending Node (Ω)

Value

126.5236

1-sigma variation

0.0038

Unit

Arg. of Perihelion (ω)

Value

192.0940

1-sigma variation

0.0903

Unit

Mean Anomaly (M)

Value

292.98076

1-sigma variation

0.31108

Unit

Perihelion distance

Value

1.056257

1-sigma variation

Unit

Aphelion distance

Value

1.481651

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.490008

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.044823

1-sigma variation

Unit

MOID

Value

0.044746

1-sigma variation

Unit

Orbit Period

Value

522.1162

1-sigma variation

Unit

U parameter

Value

8.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	9.74456E-6	5.84600E-6	3.35460E-4	1.19623E-5	-2.59209E-4	9.67953E-4
e	5.84600E-6	3.50733E-6	2.01303E-4	7.17689E-6	-1.55038E-4	5.80372E-4
i	3.35460E-4	2.01303E-4	1.15648E-2	4.11954E-4	-8.78154E-3	3.32229E-2
Ω	1.19623E-5	7.17689E-6	4.11954E-4	1.46867E-5	-3.16997E-4	1.18740E-3
ω	-2.59209E-4	-1.55038E-4	-8.78154E-3	-3.16997E-4	8.16064E-3	-2.66335E-2
M	9.67953E-4	5.80372E-4	3.32229E-2	1.18740E-3	-2.66335E-2	9.67690E-2

Date of computation: 2025-07-29 13:15 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

25.156

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

25 - 60*

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

Unit

Source

[1]

Normalized RMS of residuals

Value

0.717972

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-07-27.371157

Unit

Source

[2]

Last Observation

Value

2025-07-28.582858

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

22 (3)

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 2025OA4 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	2005-07-25 10:16	> 1 w	0.1323696	0.0408176	0.4082412
EARTH	2015-07-28 15:18	> 1 w	0.0679721	0.0435721	0.1742967
EARTH	2025-07-29 11:59	1.7	0.0467152	0.0460550	0.0002201
EARTH	2035-07-30 12:45	> 1 w	0.0443589	0.0443363	0.0055808
EARTH	2045-07-30 10:43	> 1 mo	0.0453284	0.0442555	0.1751935
EARTH	2055-07-31 21:59	> 1 mo	0.0573386	0.0439771	1.6329071
EARTH	2065-08-02 16:02	> 1 mo	0.1085789	0.0422775	4.4143413
EARTH	2075-08-06 06:08	> 1 mo	0.1908437	0.0373864	6.0400979

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
350.04655689	204.95120429	0.04474595	MINIMUM
150.74015015	12.55976166	0.48371684	MINIMUM
88.03533901	316.53415554	0.53178812	SADDLE
243.08286667	88.29944577	0.59238549	SADDLE
6.13691961	42.52557415	2.04019227	SADDLE
174.89827772	211.01006017	2.49372102	MAXIMUM

Download:

MOID Plots

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