Asteroids

523662 2012MU2 help

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

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

1.003

Aphelion (Q)

3.112

Eccentricity (e)

0.512

Inclination (i)

11.2

deg

Orbit period (P)

1077.9

Earth MOID

0.00357

U parameter

0.3

Next Earth close approach

Date

2077-06-16

Nominal distance (from Earth center)

0.06295

9416948

Maximum Brightness

17.9

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

20.8

mag

Diameter

190 - 400*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2012-06-18

Observatory

University of Arizona 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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

2.057386

1-sigma variation

1.938E-8

Unit

Eccentricity (e)

Value

0.512370

1-sigma variation

1.865E-8

Unit

Inclination (i)

Value

11.1872

1-sigma variation

7.326E-6

Unit

Long. of Ascending Node (Ω)

Value

250.2242

1-sigma variation

2.480E-5

Unit

Arg. of Perihelion (ω)

Value

16.8190

1-sigma variation

3.007E-5

Unit

Mean Anomaly (M)

Value

264.20845

1-sigma variation

0.00003

Unit

Perihelion distance

Value

1.003243

1-sigma variation

Unit

Aphelion distance

Value

3.111528

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.004082

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

1.991676

1-sigma variation

Unit

MOID

Value

0.003572

1-sigma variation

Unit

Orbit Period

Value

1077.8838

1-sigma variation

Unit

U parameter

Value

0.3

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.75405E-16	-1.06208E-16	9.40607E-16	1.45770E-13	1.30302E-13	-5.62723E-13
e	-1.06208E-16	3.48004E-16	-6.21637E-15	-1.28902E-13	2.32298E-14	1.61757E-13
i	9.40607E-16	-6.21637E-15	5.36643E-11	5.92773E-11	-5.06787E-11	-3.77469E-12
Ω	1.45770E-13	-1.28902E-13	5.92773E-11	6.15100E-10	-5.28476E-10	-1.84781E-10
ω	1.30302E-13	2.32298E-14	-5.06787E-11	-5.28476E-10	9.04304E-10	-3.19663E-10
M	-5.62723E-13	1.61757E-13	-3.77469E-12	-1.84781E-10	-3.19663E-10	8.77562E-10

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

20.774

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

190 - 400*

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

Radar R

Unit

Source

[3]

Download this part as:

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	Estimation	Estimated from absolute magnitude
[3]	EARN	1.) href="http://echo.jpl.nasa.gov/asteroids/index.html">JPL's NEO Radar Detection Program Webpage

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

2277

Unit

Source

[1]

Unobserved

Value

2853

Unit

Source

[1]

Normalized RMS of residuals

Value

0.357597

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2012-06-18.16459

Unit

Source

[2]

Last Observation

Value

2018-09-12.381663

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

215 (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

2012-06-24

Unit

Source

[3]

Last Observation

Value

2012-06-24

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

Filters

Initial Date: *

Final Date: *

Normalised Only accepted

Max residual (arcsec):

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Plot

Computation parameters

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Initial Date: *

Final Date: *

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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 523662 2012MU2 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	1965-05-27 00:58	1.0	0.0211252	0.0211192	0.0000020
EARTH	2012-07-02 20:35	< 1 min	0.1175767	0.1175764	0.0000001
EARTH	2015-05-15 06:20	< 1 min	0.1148515	0.1148507	0.0000002
EARTH	2077-06-16 08:18	1.6	0.0629484	0.0629356	0.0000043
EARTH	2080-05-17 16:47	< 1 min	0.1144640	0.1144514	0.0000042

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
350.56442539	148.63923663	0.00114111	MINIMUM
0.90379888	346.74711572	1.98556089	SADDLE
180.59572313	345.81276059	2.13065597	SADDLE
179.88897639	165.42287922	4.12885241	MAXIMUM

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MOID Plots

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