Asteroids

2004XO help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.935

Aphelion (Q)

1.136

Eccentricity (e)

0.097

Inclination (i)

26.0

deg

Orbit period (P)

384.9

Earth MOID

0.02060

U parameter

1.1

Next Earth close approach

Date

2042-05-23

Nominal distance (from Earth center)

0.17241

25791754

Maximum Brightness

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

21.6

mag

Diameter

130 - 290*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2004-12-02

Observatory

Catalina Sky Survey

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

1.035462

1-sigma variation

1.895E-8

Unit

Eccentricity (e)

Value

0.096748

1-sigma variation

3.871E-7

Unit

Inclination (i)

Value

26.0068

1-sigma variation

0.0001

Unit

Long. of Ascending Node (Ω)

Value

249.9482

1-sigma variation

1.354E-5

Unit

Arg. of Perihelion (ω)

Value

71.0228

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

62.86533

1-sigma variation

0.00008

Unit

Perihelion distance

Value

0.935283

1-sigma variation

Unit

Aphelion distance

Value

1.135641

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.021081

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.073111

1-sigma variation

Unit

MOID

Value

0.020595

1-sigma variation

Unit

Orbit Period

Value

384.8571

1-sigma variation

Unit

U parameter

Value

1.1

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.58988E-16	-7.21644E-15	-4.31537E-13	1.24695E-13	4.94020E-13	9.32249E-14
e	-7.21644E-15	1.49884E-13	5.89043E-12	-1.84122E-12	-5.33093E-12	-6.96991E-12
i	-4.31537E-13	5.89043E-12	2.89682E-9	-6.30540E-10	-2.56757E-9	2.28613E-9
Ω	1.24695E-13	-1.84122E-12	-6.30540E-10	1.83210E-10	7.01100E-10	-6.18337E-10
ω	4.94020E-13	-5.33093E-12	-2.56757E-9	7.01100E-10	6.48823E-9	-6.05402E-9
M	9.32249E-14	-6.96991E-12	2.28613E-9	-6.18337E-10	-6.05402E-9	6.71353E-9

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

21.577

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

130 - 290*

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

[-]

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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

7310

Unit

Source

[1]

Unobserved

Value

285

Unit

Source

[1]

Normalized RMS of residuals

Value

0.583112

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2004-12-02.13063

Unit

Source

[2]

Last Observation

Value

2024-12-06.722298

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

133 (2)

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 2004XO 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	1962-05-28 08:40	< 1 min	0.0638596	0.0638475	0.0000040
EARTH	1963-11-30 16:41	< 1 s	0.0692210	0.0692191	0.0000006
EARTH	1982-05-23 14:45	< 1 min	0.1700957	0.1700889	0.0000023
EARTH	1983-06-06 22:06	< 1 min	0.1452565	0.1452502	0.0000021
EARTH	1983-12-01 08:40	< 1 min	0.1299088	0.1299004	0.0000028
EARTH	2003-06-01 20:19	< 1 min	0.0366708	0.0366666	0.0000014
EARTH	2004-11-30 04:33	< 1 min	0.1138459	0.1138452	0.0000002
EARTH	2023-06-02 05:17	< 1 min	0.0425198	0.0425148	0.0000017
EARTH	2024-11-30 06:01	< 1 min	0.1267461	0.1267454	0.0000003
EARTH	2042-05-23 16:26	< 1 min	0.1724072	0.1724029	0.0000014
EARTH	2043-06-07 12:18	< 1 min	0.1548709	0.1548663	0.0000016
EARTH	2043-12-01 10:03	< 1 min	0.1187810	0.1187739	0.0000024
EARTH	2062-05-28 11:28	< 1 min	0.0671030	0.0670929	0.0000034
EARTH	2063-11-30 22:21	< 1 s	0.0703695	0.0703690	0.0000001
EARTH	2082-05-30 17:51	< 1 min	0.0240374	0.0240277	0.0000032
EARTH	2083-12-01 01:53	< 1 min	0.0817037	0.0816924	0.0000038
EARTH	2102-05-29 10:54	< 1 min	0.0703163	0.0702794	0.0000123
EARTH	2103-12-02 03:11	< 1 min	0.0690302	0.0690244	0.0000020
EARTH	2122-05-24 14:13	1.0	0.1803690	0.1803173	0.0000172
EARTH	2123-06-07 18:37	1.0	0.1347613	0.1347096	0.0000172
EARTH	2123-12-02 18:53	< 1 min	0.1345634	0.1345156	0.0000159
EARTH	2124-12-02 10:02	< 1 min	0.1987887	0.1987364	0.0000174

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
293.64159418	146.73130667	0.01880715	MINIMUM
101.43985125	326.28092973	0.07093447	MINIMUM
16.81716963	238.13934594	0.44343680	SADDLE
198.56873575	54.63686114	0.49594975	SADDLE
6.11928187	44.92434110	1.87715930	SADDLE
148.70481898	187.08295373	2.11317818	MAXIMUM

Download:

MOID Plots

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