Asteroids

2025XS4 help

Last update: 2025-12-25 13:00 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.895

Aphelion (Q)

1.608

Eccentricity (e)

0.285

Inclination (i)

1.1

deg

Orbit period (P)

511.5

Earth MOID

0.00120

U parameter

7.4

Next Earth close approach

Date

2033-01-22

Nominal distance (from Earth center)

0.0659

9857940

Maximum Brightness

25.9

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

25.8

mag

Diameter

18 - 40*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-12-13

Observatory

Pan-STARRS 1, 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

1.251633

1-sigma variation

0.000384

Unit

Eccentricity (e)

Value

0.284929

1-sigma variation

0.000285

Unit

Inclination (i)

Value

1.1296

1-sigma variation

0.0012

Unit

Long. of Ascending Node (Ω)

Value

214.3601

1-sigma variation

0.0114

Unit

Arg. of Perihelion (ω)

Value

303.1357

1-sigma variation

0.0075

Unit

Mean Anomaly (M)

Value

297.66796

1-sigma variation

0.03158

Unit

Perihelion distance

Value

0.895006

1-sigma variation

Unit

Aphelion distance

Value

1.608260

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.011972

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.367650

1-sigma variation

Unit

MOID

Value

0.001202

1-sigma variation

Unit

Orbit Period

Value

511.4626

1-sigma variation

Unit

U parameter

Value

7.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.47164E-7	1.09452E-7	4.72000E-7	4.28288E-6	-2.69305E-6	1.21161E-5
e	1.09452E-7	8.14063E-8	3.50975E-7	3.18230E-6	-1.99978E-6	9.01137E-6
i	4.72000E-7	3.50975E-7	1.51735E-6	1.38843E-5	-8.78561E-6	3.88533E-5
Ω	4.28288E-6	3.18230E-6	1.38843E-5	1.30942E-4	-8.47071E-5	3.52339E-4
ω	-2.69305E-6	-1.99978E-6	-8.78561E-6	-8.47071E-5	5.56696E-5	-2.21454E-4
M	1.21161E-5	9.01137E-6	3.88533E-5	3.52339E-4	-2.21454E-4	9.97540E-4

Date of computation: 2025-12-25 13:00 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

25.809

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

18 - 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

Unit

Source

[1]

Normalized RMS of residuals

Value

0.733819

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-12-09.546772

Unit

Source

[2]

Last Observation

Value

2025-12-24.631672

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

30 (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

Close Approaches for 2025XS4 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	1951-04-09 07:47	> 1 mo	0.0591331	0.0018791	27.6591166
EARTH	1967-04-27 02:54	> 1 d	0.0022927	0.0006704	0.0292296
MARS	1973-10-12 24:00	> 1 w	0.0390245	0.0261908	0.1546077
EARTH	1974-05-03 20:27	> 1 w	0.0585132	0.0004324	0.2922123
EARTH	1981-05-13 10:37	> 1 w	0.1981135	0.0002041	0.2086640
EARTH	2004-12-20 04:05	> 1 w	0.1885699	0.0175343	0.2013139
EARTH	2011-12-29 18:46	> 1 w	0.0599950	0.0179915	0.2742123
EARTH	2019-01-04 19:18	> 1 d	0.0180499	0.0180457	0.0003011
EARTH	2026-01-06 02:15	< 1 min	0.0204075	0.0203446	0.0000210
EARTH	2033-01-22 23:56	> 1 w	0.0658963	0.0298458	0.0128029
EARTH	2040-02-27 17:38	> 1 w	0.0959336	0.0926014	0.0011962
EARTH	2047-04-03 17:45	> 1 w	0.0723982	0.0214041	0.0172345
EARTH	2054-04-24 09:28	> 1 d	0.0173826	0.0020922	0.0163300
EARTH	2061-03-14 20:41	> 1 mo	0.0927473	0.0270343	0.0451541
EARTH	2068-01-26 03:13	> 1 mo	0.0722460	0.0197907	0.2096132
EARTH	2074-12-31 17:50	> 1 mo	0.0275272	0.0179991	0.2671364
EARTH	2100-04-25 00:01	> 1 mo	0.0203749	0.0028276	1.5073359
EARTH	2106-12-28 09:54	> 1 mo	0.0627521	0.0179862	10.7566585
EARTH	2118-05-06 11:08	> 1 mo	0.0645945	0.0031714	11.2571152
EARTH	2125-01-06 04:29	> 1 mo	0.0234292	0.0181480	0.8237615

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
46.96502420	115.73128481	0.00120212	MINIMUM
318.62201348	2.44375405	0.01811442	MINIMUM
2.80756732	59.01352339	0.09765669	SADDLE
181.71672689	238.00042675	0.59846877	SADDLE
3.22357957	239.54897282	1.90490307	SADDLE
181.75776992	58.02158503	2.59952634	MAXIMUM

Download:

MOID Plots

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