Asteroids

310560 2001QL142 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.526

Aphelion (Q)

1.573

Eccentricity (e)

0.499

Inclination (i)

26.6

deg

Orbit period (P)

392.7

Earth MOID

0.04864

U parameter

0.3

Next Earth close approach

Date

2031-09-08

Nominal distance (from Earth center)

0.12047

18022564

Maximum Brightness

16.4

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

17.8

mag

Diameter

600

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2001-08-24

Observatory

Lowell Observatory-LONEOS

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

1.049489

1-sigma variation

4.151E-9

Unit

Eccentricity (e)

Value

0.499052

1-sigma variation

1.318E-7

Unit

Inclination (i)

Value

26.6030

1-sigma variation

1.048E-5

Unit

Long. of Ascending Node (Ω)

Value

165.5421

1-sigma variation

2.354E-5

Unit

Arg. of Perihelion (ω)

Value

72.1618

1-sigma variation

2.396E-5

Unit

Mean Anomaly (M)

Value

274.19209

1-sigma variation

0.00003

Unit

Perihelion distance

Value

0.525740

1-sigma variation

Unit

Aphelion distance

Value

1.573239

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.309477

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.077805

1-sigma variation

Unit

MOID

Value

0.048636

1-sigma variation

Unit

Orbit Period

Value

392.7042

1-sigma variation

Unit

U parameter

Value

0.3

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.72300E-17	2.05371E-17	3.54833E-15	1.76194E-14	-2.13552E-14	-7.93730E-14
e	2.05371E-17	1.73836E-14	3.84990E-13	3.99015E-13	-1.97049E-13	-1.73197E-12
i	3.54833E-15	3.84990E-13	1.09861E-10	1.15805E-10	-1.02619E-10	-4.73877E-11
Ω	1.76194E-14	3.99015E-13	1.15805E-10	5.53945E-10	-5.02184E-10	-7.33190E-11
ω	-2.13552E-14	-1.97049E-13	-1.02619E-10	-5.02184E-10	5.73859E-10	-5.17430E-11
M	-7.93730E-14	-1.73197E-12	-4.73877E-11	-7.33190E-11	-5.17430E-11	7.52944E-10

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

17.794

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.3133

Unit

Source

[2]

Diameter

Value

600

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]	EARN	1.) Masiero, J.R. et al. (2018) Astron. J. 154_168(10pp). (NEOWISE Reactivation Mission Year Three: Asteroid Diameters and Albedos) (170NEOs, 6110MBAs)
[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

15682

Unit

Source

[1]

Unobserved

Value

2958

Unit

Source

[1]

Normalized RMS of residuals

Value

0.547013

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1974-10-14.4814

Unit

Source

[2]

Last Observation

Value

2017-09-20.807221

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

215 (1)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

2017-09-11

Unit

Source

[3]

Last Observation

Value

2017-09-11

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

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 310560 2001QL142 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	1974-09-14 00:28	< 1 min	0.0539822	0.0539796	0.0000009
EARTH	1988-09-07 22:30	< 1 min	0.1238022	0.1237995	0.0000009
EARTH	2017-09-14 04:09	< 1 min	0.0583406	0.0583400	0.0000002
EARTH	2031-09-08 23:05	< 1 min	0.1204734	0.1204717	0.0000006
EARTH	2046-09-20 22:17	< 1 min	0.1882805	0.1882773	0.0000011
EARTH	2060-09-13 16:35	< 1 min	0.0548186	0.0548167	0.0000006
EARTH	2074-09-08 13:54	< 1 min	0.1258282	0.1258219	0.0000021
EARTH	2103-09-18 14:21	< 1 min	0.1084950	0.1084896	0.0000018
EARTH	2117-09-15 00:44	< 1 min	0.0552553	0.0552497	0.0000019

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
81.94667706	248.56170069	0.04808349	MINIMUM
294.48418043	40.88758506	0.22703908	MINIMUM
7.61876830	146.97389603	0.58882859	SADDLE
187.73056686	318.86261581	0.80422958	SADDLE
4.74756096	321.34373276	1.47875419	SADDLE
178.07008010	132.78928664	2.52532858	MAXIMUM

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MOID Plots

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