Asteroids

494658 2000UG11 help

Last update: 2025-04-28 13:01 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.826

Aphelion (Q)

3.032

Eccentricity (e)

0.572

Inclination (i)

8.9

deg

Orbit period (P)

978.7

Earth MOID

0.00940

U parameter

0.0

Next Earth close approach

Date

2067-11-03

Nominal distance (from Earth center)

0.08123

12151314

Maximum Brightness

17.7

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

20.5

mag

Diameter

300

Taxonomic type

Rotation period (T)

4.440

Discovery Information

Discovery Date

2000-10-25

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

1.929131

1-sigma variation

1.093E-9

Unit

Eccentricity (e)

Value

0.571838

1-sigma variation

1.775E-8

Unit

Inclination (i)

Value

8.9119

1-sigma variation

4.730E-6

Unit

Long. of Ascending Node (Ω)

Value

223.8918

1-sigma variation

4.201E-6

Unit

Arg. of Perihelion (ω)

Value

240.8974

1-sigma variation

7.339E-6

Unit

Mean Anomaly (M)

Value

35.91342

1-sigma variation

3.508E-6

Unit

Perihelion distance

Value

0.825981

1-sigma variation

Unit

Aphelion distance

Value

3.032282

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.790519

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.024476

1-sigma variation

Unit

MOID

Value

0.009403

1-sigma variation

Unit

Orbit Period

Value

978.6809

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.19415E-18	1.68227E-17	-1.67662E-15	-3.41368E-16	5.49085E-15	-3.80681E-15
e	1.68227E-17	3.14904E-16	-2.17215E-14	-8.64969E-15	1.05210E-13	-5.59788E-14
i	-1.67662E-15	-2.17215E-14	2.23686E-11	-3.95313E-12	-2.94467E-12	4.01631E-12
Ω	-3.41368E-16	-8.64969E-15	-3.95313E-12	1.76488E-11	-2.09162E-11	1.83777E-12
ω	5.49085E-15	1.05210E-13	-2.94467E-12	-2.09162E-11	5.38540E-11	-1.89645E-11
M	-3.80681E-15	-5.59788E-14	4.01631E-12	1.83777E-12	-1.89645E-11	1.23085E-11

Date of computation: 2025-04-28 13:01 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

4.440

Unit

Source

[3]

[4]

Quality

Value

2,B,R

Unit

Source

[3]

[4]

Amplitude

Value

0.1

Unit

mag

Source

[3]

[4]

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

Unit

Source

[2]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

20.97

20.497

Unit

mag

Source

[5]

[6]

Slope Parameter (G)

Value

0.15**

0.32

Unit

mag

Source

[6]

[5]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

medium

Unit

Source

[7]

Diameter

Value

300

Unit

Source

[7]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

0.7

0.44

Unit

B-V

V-R

Source

[8]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Radar R

Unit

Source

[9]

Satellites

Satellites

Value

Unit

Source

Satellites

Value

Binary Child 1

Unit

Source

[2]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) Alexey V. Sergeyev and Benoit Carry A&A, 652 (2021) A59
[2]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[3]	EARN	1.) Pravec, P. et al. (2006) Icarus 181, 63-93. (Photometric survey of binary near-Earth asteroids) 2.) Petr Pravec's Ondrejov NEO Photometric Program Webpage "Prepublished Periods" 3.) Nolan, M.C. et al. (2001) LPSC 32, 2055. (Radar observations of near-Earth asteroids 2000 UG11 and 2000 UK11)
[4]	EARN	1.) Pravec, P.; et al. (2006) Icarus 181, 63-93.
[5]	EARN	1.) Pravec, P. et al. (2012) Icarus 221, 365-387 (Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations)
[6]	ESA Aegis	ESA orbit determination and impact monitoring system
[7]	EARN	1.) Binzel, R.P. et al. (2002) in "Asteroids III" (Eds. W.F.Bottke et al.), Univ.Ariz.Press, Tucson, USA, pp. 255-271. (Physical Properties of NEOs)
[8]	EARN	1.) Pravec, P. et al. (2006) Icarus 181, 63-93. (Photometric survey of binary near-Earth asteroids)
[9]	EARN	1.) href="http://echo.jpl.nasa.gov/asteroids/index.html">JPL's NEO Radar Detection Program Webpage 2.) Nolan, M.C. et al. (2000) I.A.U. Circ. HREF="http://www.cbat.eps.harvard.edu/iauc/07500/07518.html"> 7518. (2000 UG11) (Binary asteroid detection) 3.) Nolan, M.C. et al. (2001) LPSC 32, 2055. (Radar observations of near-Earth asteroids 2000 UG11 and 2000 UK11)

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

8954

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.477254

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2000-10-21.32055

Unit

Source

[2]

Last Observation

Value

2025-04-27.275741

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

458 (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

2000-10-31

Unit

Source

[3]

Last Observation

Value

2000-11-06

Unit

Source

[3]

Delay (Discarded)

Value

3 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

1 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

4 (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 494658 2000UG11 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	1965-12-06 17:12	< 1 min	0.1514759	0.1514749	0.0000004
EARTH	1974-03-07 22:13	< 1 min	0.1399263	0.1399258	0.0000001
EARTH	2000-11-07 23:05	< 1 s	0.0157211	0.0157210	0.0000000
EARTH	2008-12-18 00:43	< 1 s	0.1795857	0.1795856	0.0000000
EARTH	2017-02-06 10:53	< 1 min	0.1870721	0.1870719	0.0000001
EARTH	2025-03-12 06:15	< 1 s	0.1550934	0.1550932	0.0000001
EARTH	2067-11-03 12:01	< 1 min	0.0812265	0.0812258	0.0000002
EARTH	2075-11-20 19:22	< 1 min	0.0864473	0.0864470	0.0000001
EARTH	2092-03-04 08:56	< 1 min	0.1326653	0.1326651	0.0000001

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
327.94571858	305.62082611	0.00940337	MINIMUM
33.71136375	62.31074888	0.13442623	MINIMUM
4.74898090	11.19529689	0.20284383	SADDLE
0.55254434	183.25670418	1.83803414	SADDLE
180.44165411	182.50305671	2.03002214	SADDLE
179.80846080	2.16828501	4.00910967	MAXIMUM

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MOID Plots

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