Asteroids

2025OT4 help

Last update: 2026-06-04 23:11 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.920

Aphelion (Q)

1.198

Eccentricity (e)

0.131

Inclination (i)

8.9

deg

Orbit period (P)

397.9

Earth MOID

0.00549

U parameter

3.2

Next Earth close approach

Date

2037-08-03

Nominal distance (from Earth center)

0.08748

13087255

Maximum Brightness

22.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

24.8

mag

Diameter

29 - 60*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-07-28

Observatory

ATLAS-HKO, 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

1.058812

1-sigma variation

4.992E-7

Unit

Eccentricity (e)

Value

0.131115

1-sigma variation

0.000001

Unit

Inclination (i)

Value

8.9167

1-sigma variation

0.0001

Unit

Long. of Ascending Node (Ω)

Value

134.1757

1-sigma variation

4.756E-6

Unit

Arg. of Perihelion (ω)

Value

261.7943

1-sigma variation

3.240E-5

Unit

Mean Anomaly (M)

Value

210.29440

1-sigma variation

0.00007

Unit

Perihelion distance

Value

0.919986

1-sigma variation

Unit

Aphelion distance

Value

1.197638

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.074811

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.006926

1-sigma variation

Unit

MOID

Value

0.005491

1-sigma variation

Unit

Orbit Period

Value

397.9485

1-sigma variation

Unit

U parameter

Value

3.2

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.49170E-13	4.57386E-13	2.89035E-11	2.13806E-12	-1.28769E-11	-3.67911E-11
e	4.57386E-13	8.49341E-13	5.35957E-11	3.95149E-12	-2.17753E-11	-6.82360E-11
i	2.89035E-11	5.35957E-11	3.45581E-9	2.48988E-10	-1.35872E-9	-4.33392E-9
Ω	2.13806E-12	3.95149E-12	2.48988E-10	2.26160E-11	-1.05187E-10	-3.21330E-10
ω	-1.28769E-11	-2.17753E-11	-1.35872E-9	-1.05187E-10	1.04985E-9	1.74227E-9
M	-3.67911E-11	-6.82360E-11	-4.33392E-9	-3.21330E-10	1.74227E-9	5.50793E-9

Date of computation: 2026-06-04 23:11 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

24.834

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

29 - 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

237

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.482616

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-07-26.360266

Unit

Source

[2]

Last Observation

Value

2026-03-20.32622

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

139 (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

2025-08-06

Unit

Source

[3]

Last Observation

Value

2025-08-06

Unit

Source

[3]

Delay (Discarded)

Value

0 (0)

Unit

Source

[-]

Doppler (Discarded)

Value

1 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

1 (0)

Unit

Source

[1]

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
[3]	JPL Radar Observations	Jet Propulsion Laboratory: https://ssd.jpl.nasa.gov/dat/radar_data_ast.txt

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 2025OT4 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	1959-01-17 17:06	< 1 min	0.0923345	0.0923219	0.0000042
EARTH	1969-08-10 03:38	1.2	0.0272083	0.0271679	0.0000135
EARTH	1970-02-25 22:55	7.0	0.1899473	0.1899231	0.0000081
EARTH	1980-08-03 17:53	5.1	0.0757095	0.0755033	0.0000687
EARTH	1993-01-16 09:17	< 1 min	0.1066215	0.1065183	0.0000344
EARTH	2004-01-24 15:55	< 1 min	0.0814912	0.0814892	0.0000007
EARTH	2014-08-12 08:38	4.4	0.0546104	0.0544868	0.0000412
EARTH	2015-02-19 16:44	22.3	0.1739793	0.1739024	0.0000256
EARTH	2025-08-07 17:35	< 1 s	0.0099347	0.0099345	0.0000000
EARTH	2037-08-03 10:50	3.4	0.0874829	0.0873270	0.0000520
EARTH	2039-01-20 22:26	1.4	0.1971190	0.1969791	0.0000466
EARTH	2051-01-19 19:38	< 1 min	0.0752641	0.0752086	0.0000185
EARTH	2063-01-22 20:24	< 1 min	0.0599987	0.0599952	0.0000012
EARTH	2074-10-11 08:33	37.8	0.1642901	0.1642386	0.0000172
EARTH	2075-02-01 14:16	14.2	0.1088384	0.1087388	0.0000332
EARTH	2086-08-13 15:37	5.4	0.0828726	0.0826867	0.0000620
EARTH	2087-02-19 11:17	32.9	0.1679510	0.1678276	0.0000411
EARTH	2098-08-11 00:45	1.3	0.0458881	0.0458453	0.0000143
EARTH	2099-02-26 22:37	8.2	0.1882587	0.1882295	0.0000097
EARTH	2110-08-20 15:58	10.0	0.1258358	0.1256022	0.0000779
EARTH	2111-02-09 17:41	32.2	0.1376941	0.1375390	0.0000517
EARTH	2123-01-25 00:19	22.0	0.0734253	0.0732273	0.0000662

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
286.76935571	211.45888356	0.00549126	MINIMUM
76.93875457	15.86241736	0.05708495	MINIMUM
3.35539577	296.27829388	0.16493537	SADDLE
181.35628520	111.91840667	0.25541242	SADDLE
353.71307296	105.23406395	1.91970693	SADDLE
172.94991199	284.43930369	2.18620594	MAXIMUM

Download:

MOID Plots

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