Asteroids

531277 2012MM11 help

Last update: 2025-03-28 15:40 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.744

Aphelion (Q)

3.484

Eccentricity (e)

0.648

Inclination (i)

3.2

deg

Orbit period (P)

1122.6

Earth MOID

0.01131

U parameter

0.0

Next Earth close approach

Date

2052-07-31

Nominal distance (from Earth center)

0.1124

16815464

Maximum Brightness

19.4

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

20.3

mag

Diameter

230 - 500*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2012-06-24

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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

2.113942

1-sigma variation

1.689E-9

Unit

Eccentricity (e)

Value

0.648099

1-sigma variation

1.274E-8

Unit

Inclination (i)

Value

3.1844

1-sigma variation

4.504E-6

Unit

Long. of Ascending Node (Ω)

Value

245.4114

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

124.2559

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

45.54188

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.743898

1-sigma variation

Unit

Aphelion distance

Value

3.483986

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.915288

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.088069

1-sigma variation

Unit

MOID

Value

0.011309

1-sigma variation

Unit

Orbit Period

Value

1122.6336

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.85144E-18	1.84217E-17	-9.93274E-16	-3.19021E-14	3.55375E-14	-5.92895E-15
e	1.84217E-17	1.62256E-16	9.13829E-15	8.55853E-14	-5.09319E-14	-4.56827E-14
i	-9.93274E-16	9.13829E-15	2.02876E-11	3.23592E-10	-3.24438E-10	-3.27883E-12
Ω	-3.19021E-14	8.55853E-14	3.23592E-10	5.91300E-9	-5.89968E-9	-6.38826E-11
ω	3.55375E-14	-5.09319E-14	-3.24438E-10	-5.89968E-9	5.89639E-9	5.31653E-11
M	-5.92895E-15	-4.56827E-14	-3.27883E-12	-6.38826E-11	5.31653E-11	2.79271E-11

Date of computation: 2025-03-28 15:40 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

20.269

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

230 - 500*

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

3511

Unit

Source

[1]

Unobserved

Value

1192

Unit

Source

[1]

Normalized RMS of residuals

Value

0.432048

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2012-06-24.31255

Unit

Source

[2]

Last Observation

Value

2022-02-03.204788

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

549 (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

2012-07-13

Unit

Source

[3]

Last Observation

Value

2012-07-13

Unit

Source

[3]

Delay (Discarded)

Value

2 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

1 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

3 (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

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 531277 2012MM11 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	1969-08-10 14:45	1.4	0.1666557	0.1666435	0.0000040
EARTH	1975-12-09 15:53	< 1 min	0.0157709	0.0157683	0.0000009
EARTH	2012-07-17 12:33	< 1 s	0.0536358	0.0536357	0.0000000
EARTH	2018-12-01 09:25	< 1 min	0.0862440	0.0862436	0.0000001
EARTH	2052-07-31 21:55	< 1 min	0.1124044	0.1124039	0.0000002
EARTH	2092-11-15 02:13	< 1 min	0.1782440	0.1782427	0.0000005

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
34.42229937	335.47975326	0.01130854	MINIMUM
323.14786570	196.06310420	0.04488490	MINIMUM
358.16021320	264.74474704	0.26023247	SADDLE
358.47510851	85.42439413	1.74226170	SADDLE
179.64677737	87.04141951	2.48640439	SADDLE
179.70601868	267.06835690	4.48378477	MAXIMUM

Download:

MOID Plots

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