Asteroids

139622 2001QQ142 help

Last update: 2026-07-30 09:40 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.980

Aphelion (Q)

1.861

Eccentricity (e)

0.310

Inclination (i)

9.3

deg

Orbit period (P)

618.4

Earth MOID

0.01103

U parameter

0.0

Next Earth close approach

Date

2045-12-17

Nominal distance (from Earth center)

0.03027

4528489

Maximum Brightness

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

18.5

mag

Diameter

500 - 1200*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2001-08-25

Observatory

Haleakala-AMOS

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

1.420520

1-sigma variation

9.786E-10

Unit

Eccentricity (e)

Value

0.310041

1-sigma variation

8.248E-9

Unit

Inclination (i)

Value

9.3390

1-sigma variation

5.390E-7

Unit

Long. of Ascending Node (Ω)

Value

83.1631

1-sigma variation

6.113E-7

Unit

Arg. of Perihelion (ω)

Value

337.9609

1-sigma variation

3.677E-6

Unit

Mean Anomaly (M)

Value

180.11822

1-sigma variation

1.520E-6

Unit

Perihelion distance

Value

0.980101

1-sigma variation

Unit

Aphelion distance

Value

1.860939

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.012717

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.786202

1-sigma variation

Unit

MOID

Value

0.011026

1-sigma variation

Unit

Orbit Period

Value

618.3997

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	9.57715E-19	1.28848E-18	-6.95047E-17	1.22016E-16	-1.01951E-15	-1.10686E-16
e	1.28848E-18	6.80290E-17	-2.35756E-15	3.37079E-15	-1.67967E-14	4.96771E-15
i	-6.95047E-17	-2.35756E-15	2.90470E-13	-2.74169E-13	1.12555E-12	-3.52759E-13
Ω	1.22016E-16	3.37079E-15	-2.74169E-13	3.73694E-13	-1.63520E-12	5.11793E-13
ω	-1.01951E-15	-1.67967E-14	1.12555E-12	-1.63520E-12	1.35173E-11	-5.13595E-12
M	-1.10686E-16	4.96771E-15	-3.52759E-13	5.11793E-13	-5.13595E-12	2.31081E-12

Date of computation: 2026-07-30 09:40 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

[1]

Taxonomy (all)

Value

Sq,Q

Unit

Source

[2]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

18.492

Unit

mag

Source

[3]

Slope Parameter (G)

Value

0.15**

Unit

Source

[3]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[4]

Diameter

Value

500 - 1200*

Unit

Source

[4]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

Unit

mag

Source

[-]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Visual S

Unit

Source

[5]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) DeMeo, F.E. et al. (2014) Icarus 227, 112-122. (Mars encounters cause fresh surfaces on some near-Earth asteroids) (contains taxonomic classification of 249 NEAs)
[2]	EARN	1.) Binzel, R.P. et al. (2004) Icarus 170, 259-294. (Observed spectral properties of near-Earth objects: results for population distribution, source regions, and space weathering processes.) 2.) DeMeo, F.E. et al. (2014) Icarus 227, 112-122. (Mars encounters cause fresh surfaces on some near-Earth asteroids) (contains taxonomic classification of 249 NEAs)
[3]	ESA Aegis	ESA orbit determination and impact monitoring system
[4]	Estimation	Estimated from absolute magnitude
[5]	EARN	1.) Binzel, R.P. et al. (2004) Icarus 170, 259-294. (Observed spectral properties of near-Earth objects: results for population distribution, source regions, and space weathering processes.) 2.) Binzel, R.P. et al. (2006) LPSC 37, 1491. (The MIT-Hawaii-IRTF joint campaign for NEO spectral reconnaissance.) 3.) Binzel, R.P. et al. href="http://smass.mit.edu/minus.html"> Webpage 4.) deLeon, J. et al. (2010) Astron. Astrophys 517, A23. (Observations, compositional, and physical characterization of near-Earth and Mars-crosser asteroids from a spectroscopic survey)

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

9070

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.451765

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2001-08-22.61453

Unit

Source

[2]

Last Observation

Value

2026-06-22.190768

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

1216 (10)

Unit

Source

[1]

Radar Summary

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

Radar

Value

Unit

Source

First Observation

Value

2023-12-05

Unit

Source

[3]

Last Observation

Value

2023-12-24

Unit

Source

[3]

Delay (Discarded)

Value

6 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

2 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

8 (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

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Final Date: *

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Max residual (arcsec):

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Computation parameters

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Output option:

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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 139622 2001QQ142 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	1967-12-15 01:45	< 1 min	0.0145907	0.0145905	0.0000000
EARTH	1984-11-05 11:52	< 1 min	0.1354684	0.1354681	0.0000001
EARTH	2006-12-29 21:59	< 1 s	0.1380749	0.1380745	0.0000001
EARTH	2023-12-06 20:59	< 1 s	0.0369448	0.0369448	0.0000000
EARTH	2045-12-17 19:50	< 1 min	0.0302711	0.0302707	0.0000001
EARTH	2062-12-05 08:49	< 1 min	0.0419856	0.0419830	0.0000009
EARTH	2101-11-30 09:08	1.3	0.0636863	0.0636760	0.0000034
EARTH	2123-12-13 07:09	< 1 min	0.0137817	0.0137756	0.0000020

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
14.67155830	337.23203043	0.01102641	MINIMUM
176.80727971	134.31941806	0.85341342	SADDLE
356.88671715	133.45390808	1.99095275	SADDLE
179.50217449	316.27886565	2.84771826	MAXIMUM

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MOID Plots

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