Asteroids

2015ME131 help

Last update: 2025-07-29 02:36 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Aten

Perihelion (q)

0.643

Aphelion (Q)

0.990

Eccentricity (e)

0.212

Inclination (i)

33.6

deg

Orbit period (P)

269.4

Earth MOID

0.04390

U parameter

0.9

Next Earth close approach

Date

2037-08-13

Nominal distance (from Earth center)

0.13543

20260487

Maximum Brightness

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

19.7

mag

Diameter

300 - 700*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2015-06-23

Observatory

Pan-STARRS 1, Haleakala

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

0.816401

1-sigma variation

6.173E-9

Unit

Eccentricity (e)

Value

0.212200

1-sigma variation

2.460E-7

Unit

Inclination (i)

Value

33.6419

1-sigma variation

0.0001

Unit

Long. of Ascending Node (Ω)

Value

317.7742

1-sigma variation

2.528E-5

Unit

Arg. of Perihelion (ω)

Value

156.8822

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

336.89562

1-sigma variation

0.00011

Unit

Perihelion distance

Value

0.643161

1-sigma variation

Unit

Aphelion distance

Value

0.989641

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.044493

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.334259

1-sigma variation

Unit

MOID

Value

0.043898

1-sigma variation

Unit

Orbit Period

Value

269.4347

1-sigma variation

Unit

U parameter

Value

0.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.81049E-17	2.45166E-16	-3.24445E-14	8.26164E-14	-3.15314E-15	-1.48389E-13
e	2.45166E-16	6.05027E-14	-2.97841E-12	4.43305E-13	-1.26943E-11	2.14295E-11
i	-3.24445E-14	-2.97841E-12	3.52019E-9	2.69524E-10	5.20254E-10	-1.49565E-9
Ω	8.26164E-14	4.43305E-13	2.69524E-10	6.39135E-10	-2.55612E-11	-7.91089E-10
ω	-3.15314E-15	-1.26943E-11	5.20254E-10	-2.55612E-11	4.57711E-9	-7.25354E-9
M	-1.48389E-13	2.14295E-11	-1.49565E-9	-7.91089E-10	-7.25354E-9	1.29463E-8

Date of computation: 2025-07-29 02:36 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

19.672

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

300 - 700*

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

2978

Unit

Source

[1]

Unobserved

Value

750

Unit

Source

[1]

Normalized RMS of residuals

Value

0.757135

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2015-06-23.58462

Unit

Source

[2]

Last Observation

Value

2023-08-18.83202

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

62 (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 2015ME131 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	1950-08-09 09:04	< 1 min	0.0475583	0.0475566	0.0000006
EARTH	1964-08-11 00:42	< 1 min	0.0758210	0.0758150	0.0000020
EARTH	1978-08-13 11:12	< 1 min	0.1455793	0.1455715	0.0000026
EARTH	1981-08-05 11:54	< 1 min	0.1510838	0.1510761	0.0000026
EARTH	1995-08-08 02:45	< 1 min	0.0879892	0.0879839	0.0000018
EARTH	2009-08-09 07:06	< 1 min	0.0484971	0.0484960	0.0000003
EARTH	2023-08-11 06:56	< 1 min	0.0558824	0.0558820	0.0000001
EARTH	2037-08-13 04:03	< 1 min	0.1354330	0.1354306	0.0000008
EARTH	2040-08-05 11:14	< 1 min	0.1519361	0.1519331	0.0000010
EARTH	2054-08-10 00:05	< 1 min	0.0445157	0.0445146	0.0000004
EARTH	2068-08-13 13:33	< 1 min	0.1584015	0.1583930	0.0000029
EARTH	2071-08-07 13:09	< 1 min	0.1147124	0.1147034	0.0000030
EARTH	2085-08-12 09:50	< 1 min	0.0996413	0.0996321	0.0000031
EARTH	2088-08-05 05:10	< 1 min	0.1665519	0.1665424	0.0000032
EARTH	2102-08-13 06:18	< 1 min	0.0830912	0.0830855	0.0000019
EARTH	2105-08-06 04:04	< 1 min	0.1782367	0.1782310	0.0000019
EARTH	2119-08-13 21:11	< 1 min	0.0937609	0.0937586	0.0000008
EARTH	2122-08-06 23:16	< 1 min	0.1634165	0.1634137	0.0000009

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
207.58483595	215.49611792	0.04389818	MINIMUM
22.30694312	38.30073813	0.33279106	MINIMUM
305.47380047	308.80099108	0.55873911	SADDLE
102.76938789	126.06116390	0.55940316	SADDLE
330.13317904	161.10069352	1.63177410	SADDLE
191.23299827	24.15227379	1.96686121	MAXIMUM

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MOID Plots

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