Asteroids

208023 1999AQ10 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.714

Aphelion (Q)

1.154

Eccentricity (e)

0.235

Inclination (i)

6.5

deg

Orbit period (P)

329.6

Earth MOID

0.00566

U parameter

0.0

Next Earth close approach

Date

2026-12-23

Nominal distance (from Earth center)

0.19815

29642587

Maximum Brightness

18.5

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

20.4

mag

Diameter

100

Taxonomic type

Rotation period (T)

6.280

Discovery Information

Discovery Date

1999-01-14

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.933845

1-sigma variation

6.466E-10

Unit

Eccentricity (e)

Value

0.235350

1-sigma variation

2.460E-8

Unit

Inclination (i)

Value

6.4995

1-sigma variation

2.227E-6

Unit

Long. of Ascending Node (Ω)

Value

326.9545

1-sigma variation

4.257E-6

Unit

Arg. of Perihelion (ω)

Value

300.6028

1-sigma variation

6.149E-6

Unit

Mean Anomaly (M)

Value

109.98116

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.714065

1-sigma variation

Unit

Aphelion distance

Value

1.153625

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.225029

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.013546

1-sigma variation

Unit

MOID

Value

0.005664

1-sigma variation

Unit

Orbit Period

Value

329.6179

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.18043E-19	1.42321E-17	2.19324E-16	1.01891E-15	-1.91748E-15	-2.86936E-16
e	1.42321E-17	6.05137E-16	3.18107E-15	-5.62640E-15	-8.52402E-15	-4.01947E-14
i	2.19324E-16	3.18107E-15	4.95812E-12	1.54988E-12	-1.36835E-12	-2.12910E-12
Ω	1.01891E-15	-5.62640E-15	1.54988E-12	1.81184E-11	-2.55776E-11	1.18190E-11
ω	-1.91748E-15	-8.52402E-15	-1.36835E-12	-2.55776E-11	3.78050E-11	-1.42776E-11
M	-2.86936E-16	-4.01947E-14	-2.12910E-12	1.18190E-11	-1.42776E-11	2.65563E-11

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

2.790

6.280

Unit

Source

[4]

[1]

Quality

Value

Unit

Source

[4]

Amplitude

Value

0.17

0.2

Unit

mag

Source

[1]

[4]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

152

Unit

Source

[1]

Spinvector B

Value

Unit

Source

[1]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

Unit

Source

[2]

Taxonomy (all)

Value

Unit

Source

[3]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

20.437

20.4

Unit

mag

Source

[5]

[6]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[5]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.46

Unit

Source

[7]

Diameter

Value

100

Unit

Source

[7]

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

Radar R

Unit

Source

[8]

[9]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) Lowell Observatory Near-Earth Asteroid Photometric Survey (NEAPS): Paper 4. Skiff, Brian A et al.
[2]	EARN	1.) Somers, J.M. et al. (2010) DPS 42, 1316. (abstract) (Optical Characterization Of Planetary Radar Targets, Low-deltaV, And Potentially Hazardous Asteroids: Results From 2009-2010)
[3]	EARN	1.) Somers, J.M. et al. (2010) DPS 42, 1316. (abstract) (Optical Characterization Of Planetary Radar Targets, Low-deltaV, And Potentially Hazardous Asteroids: Results From 2009-2010) 2.) 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.)
[4]	EARN	1.) BetzlerS, A. & A.B. Novaes (2009) MPB 36, 145-147. (PHOTOMETRIC OBSERVATIONS OF 1998 OR2, 1999 AQ10, AND 2008 TC3) 2.) Koehn, B.W. et al. (2014) MPB 41, 286-300. (LOWELL OBSERVATORY NEAR-EARTH ASTEROID PHOTOMETRIC SURVEY (NEAPS) - 2009 JANUARY THROUGH 2009 JUNE) (433,1943,3554,5011,5604, 5620,5693,8566,14402,16834,22753,35107,52768,68350,85867, 138883,141052,143651,154244,161989,162385,163758,175706, 194386,203217,207945,208023,212546,256412,2001FE90,2004LV3, 2005BC,2005SG19,2008QT3,2008WL60,2009DE47,2009DO111,2009EP2, 2009FD,2009JM2)
[5]	ESA Aegis	ESA orbit determination and impact monitoring system
[6]	EARN	1.) BetzlerS, A. & A.B. Novaes (2009) MPB 36, 145-147. (PHOTOMETRIC OBSERVATIONS OF 1998 OR2, 1999 AQ10, AND 2008 TC3)
[7]	EARN	1.) Trilling, D.E.; Mommert, M.; Hora, J.; Chesley, S.; et al. (2016) Astron. J. 152, A172.
[8]	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.)
[9]	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

6983

Unit

Source

[1]

Unobserved

Value

2771

Unit

Source

[1]

Normalized RMS of residuals

Value

0.495016

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1999-01-14.3298

Unit

Source

[2]

Last Observation

Value

2018-02-26.17545

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

452 (4)

Unit

Source

[1]

Radar Summary

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

Radar

Value

Unit

Source

First Observation

Value

2009-02-10

Unit

Source

[3]

Last Observation

Value

2009-02-13

Unit

Source

[3]

Delay (Discarded)

Value

3 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

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 208023 1999AQ10 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	1951-02-17 00:06	< 1 s	0.1056506	0.1056503	0.0000001
EARTH	1959-12-28 05:30	< 1 min	0.1979499	0.1979498	0.0000000
EARTH	1968-10-12 16:56	< 1 s	0.0952136	0.0952134	0.0000001
EARTH	1970-02-11 11:16	< 1 min	0.0970381	0.0970376	0.0000002
EARTH	1978-09-20 21:46	< 1 min	0.1607655	0.1607651	0.0000001
EARTH	1978-10-27 15:47	< 1 min	0.1638844	0.1638840	0.0000001
EARTH	1980-02-18 07:59	< 1 s	0.0595634	0.0595627	0.0000002
EARTH	1989-01-02 20:42	< 1 min	0.1909232	0.1909231	0.0000000
VENUS	1990-05-15 23:55	< 1 min	0.0413308	0.0413303	0.0000001
EARTH	1997-10-13 04:10	< 1 s	0.0954618	0.0954617	0.0000000
EARTH	1999-02-10 23:45	< 1 min	0.1012973	0.1012971	0.0000001
EARTH	2007-10-02 02:19	< 1 min	0.1377261	0.1377259	0.0000001
EARTH	2009-02-18 15:28	< 1 s	0.0112879	0.0112878	0.0000000
EARTH	2016-10-18 02:43	< 1 s	0.1392329	0.1392327	0.0000001
EARTH	2018-01-31 02:16	< 1 min	0.1350317	0.1350315	0.0000000
EARTH	2026-12-23 13:12	< 1 min	0.1981485	0.1981484	0.0000000
EARTH	2035-09-11 06:24	< 1 min	0.1865585	0.1865584	0.0000000
EARTH	2035-11-17 10:25	< 1 min	0.1811245	0.1811244	0.0000000
EARTH	2037-02-15 21:45	< 1 s	0.1306895	0.1306890	0.0000001
EARTH	2044-10-06 17:07	< 1 s	0.1306332	0.1306331	0.0000000
EARTH	2046-02-17 20:42	< 1 s	0.0619658	0.0619655	0.0000001
EARTH	2053-10-10 05:33	< 1 s	0.1151329	0.1151327	0.0000001
EARTH	2055-02-18 09:52	< 1 s	0.0450745	0.0450742	0.0000001
EARTH	2062-09-28 21:47	< 1 min	0.1551982	0.1551978	0.0000001
EARTH	2064-02-17 00:10	< 1 s	0.1161798	0.1161796	0.0000001
EARTH	2071-12-06 18:51	< 1 min	0.1949009	0.1949008	0.0000000
EARTH	2080-12-29 15:28	< 1 min	0.1905056	0.1905055	0.0000000
VENUS	2083-04-07 18:27	< 1 min	0.0303368	0.0303364	0.0000001
EARTH	2090-01-03 04:58	< 1 min	0.1879445	0.1879442	0.0000001
EARTH	2098-12-30 20:55	< 1 min	0.1917751	0.1917747	0.0000001
EARTH	2107-12-28 16:37	< 1 min	0.1949684	0.1949681	0.0000001
EARTH	2116-12-31 01:18	< 1 min	0.1914329	0.1914326	0.0000001
VENUS	2120-02-28 05:13	< 1 min	0.0254893	0.0254881	0.0000004

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
254.86888708	46.72828803	0.00576032	MINIMUM
99.42537760	278.69013806	0.09344420	MINIMUM
174.16111358	341.12382698	0.19998138	SADDLE
357.49508835	161.86454037	0.31322215	SADDLE
0.52388331	345.82536268	1.69622417	SADDLE
181.41984552	166.78447961	2.16686070	MAXIMUM

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MOID Plots

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