Asteroids

2008XS help

Last update: 2025-09-10 00:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

1.003

Aphelion (Q)

1.546

Eccentricity (e)

0.213

Inclination (i)

3.3

deg

Orbit period (P)

525.4

Earth MOID

0.01729

U parameter

8.8

Next Earth close approach

Date

2044-12-06

Nominal distance (from Earth center)

0.02911

4354702

Maximum Brightness

21.4

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

27.4

mag

Diameter

9 - 20*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2008-12-02

Observatory

Lincoln Laboratory ETS, New Mexico

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

1.274206

1-sigma variation

0.003227

Unit

Eccentricity (e)

Value

0.213039

1-sigma variation

0.001834

Unit

Inclination (i)

Value

3.3443

1-sigma variation

0.0649

Unit

Long. of Ascending Node (Ω)

Value

250.5127

1-sigma variation

0.6510

Unit

Arg. of Perihelion (ω)

Value

170.6180

1-sigma variation

1.0376

Unit

Mean Anomaly (M)

Value

281.38437

1-sigma variation

0.22862

Unit

Perihelion distance

Value

1.002751

1-sigma variation

Unit

Aphelion distance

Value

1.545662

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.524372

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.019239

1-sigma variation

Unit

MOID

Value

0.017288

1-sigma variation

Unit

Orbit Period

Value

525.3613

1-sigma variation

Unit

U parameter

Value

8.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.04117E-5	5.91839E-6	-2.09367E-4	2.10066E-3	-3.34817E-3	7.37679E-4
e	5.91839E-6	3.36424E-6	-1.19012E-4	1.19410E-3	-1.90323E-3	4.19327E-4
i	-2.09367E-4	-1.19012E-4	4.21012E-3	-4.22419E-2	6.73279E-2	-1.48339E-2
Ω	2.10066E-3	1.19410E-3	-4.22419E-2	4.23831E-1	-6.75529E-1	1.48834E-1
ω	-3.34817E-3	-1.90323E-3	6.73279E-2	-6.75529E-1	1.07671E0	-2.37225E-1
M	7.37679E-4	4.19327E-4	-1.48339E-2	1.48834E-1	-2.37225E-1	5.22673E-2

Date of computation: 2025-09-10 00:30 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

27.403

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

9 - 20*

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

6162

Unit

Source

[1]

Normalized RMS of residuals

Value

0.417495

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2008-12-02.25728

Unit

Source

[2]

Last Observation

Value

2008-12-07.26113

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

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 2008XS 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	1972-12-14 23:26	> 1 w	0.0714156	0.0036384	0.1223205
EARTH	1985-10-25 11:50	> 1 w	0.0769094	0.0231248	0.1358799
EARTH	2008-11-28 12:34	1.2	0.0174168	0.0172724	0.0000481
MARS	2018-03-22 14:13	> 1 w	0.0332460	0.0231247	0.0309639
EARTH	2021-11-05 23:17	> 1 w	0.0456367	0.0083620	0.0713915
EARTH	2044-12-06 01:27	> 1 mo	0.0291094	0.0120251	0.2980653
EARTH	2057-12-23 01:55	> 1 mo	0.1257550	0.0059656	1.8671457
MARS	2061-06-26 04:24	> 1 mo	0.0266784	0.0239209	0.5150396
EARTH	2086-10-28 04:04	> 1 mo	0.0806442	0.0198631	2.5180038
EARTH	2099-11-10 10:23	> 1 mo	0.0398967	0.0025355	2.6352599
EARTH	2122-12-27 12:55	> 1 mo	0.1561258	0.0107466	13.4482606

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
2.95227970	323.11784160	0.01717744	MINIMUM
177.75080881	136.67704713	0.53385724	SADDLE
356.87936861	135.69759298	2.01458768	SADDLE
178.19815584	317.04958186	2.53346138	MAXIMUM

Download:

MOID Plots

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