Asteroids

2004MO3 help

Last update: 2026-01-10 13:16 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.819

Aphelion (Q)

1.646

Eccentricity (e)

0.336

Inclination (i)

2.6

deg

Orbit period (P)

499.8

Earth MOID

0.01167

U parameter

0.0

Next Earth close approach

Date

2026-01-17

Nominal distance (from Earth center)

0.04343

6496615

Maximum Brightness

18.2

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

22.2

mag

Diameter

100 - 220*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2004-06-21

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

1.232489

1-sigma variation

1.275E-9

Unit

Eccentricity (e)

Value

0.335828

1-sigma variation

3.452E-8

Unit

Inclination (i)

Value

2.5537

1-sigma variation

5.971E-6

Unit

Long. of Ascending Node (Ω)

Value

252.5292

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

297.9779

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

280.10624

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.818585

1-sigma variation

Unit

Aphelion distance

Value

1.646394

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.071008

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.311819

1-sigma variation

Unit

MOID

Value

0.011672

1-sigma variation

Unit

Orbit Period

Value

499.7735

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.62603E-18	-4.18649E-17	-7.92627E-16	-4.25347E-14	3.88953E-14	-1.34072E-15
e	-4.18649E-17	1.19185E-15	1.00658E-14	8.90532E-13	-8.44299E-13	6.96722E-14
i	-7.92627E-16	1.00658E-14	3.56479E-11	3.87411E-10	-3.71419E-10	-9.34514E-12
Ω	-4.25347E-14	8.90532E-13	3.87411E-10	5.66999E-9	-5.35094E-9	-1.34966E-10
ω	3.88953E-14	-8.44299E-13	-3.71419E-10	-5.35094E-9	5.08303E-9	1.04295E-10
M	-1.34072E-15	6.96722E-14	-9.34514E-12	-1.34966E-10	1.04295E-10	2.86906E-11

Date of computation: 2026-01-10 13:16 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

22.208

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

100 - 220*

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

7873

Unit

Source

[1]

Unobserved

Value

0.9

Unit

Source

[1]

Normalized RMS of residuals

Value

0.59056

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2004-06-21.32208

Unit

Source

[2]

Last Observation

Value

2026-01-10.350187

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

193 (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 2004MO3 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	1952-01-11 16:24	< 1 s	0.1444238	0.1444230	0.0000002
EARTH	1956-06-16 08:13	< 1 min	0.0173894	0.0173874	0.0000007
EARTH	1967-05-07 08:30	< 1 min	0.1564453	0.1564444	0.0000003
EARTH	1978-03-22 07:03	< 1 min	0.1797180	0.1797179	0.0000000
MARS	1983-04-24 20:52	< 1 min	0.0253140	0.0253134	0.0000002
EARTH	1989-01-28 12:52	< 1 min	0.0813774	0.0813768	0.0000002
EARTH	1993-06-26 18:39	< 1 s	0.1258729	0.1258722	0.0000002
EARTH	2000-01-15 08:49	< 1 s	0.0801305	0.0801300	0.0000002
EARTH	2004-06-15 17:47	< 1 min	0.0260696	0.0260694	0.0000001
EARTH	2015-03-31 16:20	< 1 min	0.1839756	0.1839754	0.0000001
EARTH	2026-01-17 12:02	< 1 s	0.0434272	0.0434271	0.0000000
EARTH	2030-06-09 09:36	< 1 min	0.0753044	0.0753038	0.0000002
EARTH	2041-02-07 03:19	< 1 min	0.1142330	0.1142326	0.0000001
EARTH	2045-06-22 11:31	< 1 min	0.0501064	0.0501056	0.0000003
EARTH	2056-04-07 14:04	< 1 min	0.1837805	0.1837804	0.0000000
EARTH	2067-01-17 12:01	< 1 min	0.0508026	0.0508007	0.0000006
EARTH	2071-06-04 10:48	< 1 min	0.0980956	0.0980943	0.0000005
EARTH	2082-01-26 23:34	< 1 min	0.0711551	0.0711547	0.0000001
EARTH	2086-06-19 11:22	< 1 min	0.0127342	0.0127340	0.0000001
EARTH	2097-04-04 06:52	4.4	0.1837857	0.1837855	0.0000001
MARS	2103-09-09 16:15	< 1 min	0.0458173	0.0457983	0.0000063
EARTH	2108-01-20 08:08	1.1	0.0389573	0.0389388	0.0000062
EARTH	2112-06-10 20:36	3.4	0.0742135	0.0741756	0.0000126
EARTH	2123-02-05 07:23	4.1	0.1023886	0.1023594	0.0000097

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
58.44894114	165.80290861	0.01167173	MINIMUM
306.34479486	17.57323138	0.03204035	MINIMUM
2.63879835	91.75698056	0.18560285	SADDLE
181.47594240	270.86947162	0.64765780	SADDLE
3.31372188	272.71687175	1.81866359	SADDLE
181.74247258	91.05788928	2.64666625	MAXIMUM

Download:

MOID Plots

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