Asteroids

2009UG

Last update: 2023-10-02 13:05 UTC

Orbital Properties

Epoch

60200.0

MJD

Orbit type

Aten

Perihelion (q)

0.493

Aphelion (Q)

1.085

Eccentricity (e)

0.375

Inclination (i)

5.0

deg

Orbit period (P)

255.8

Earth MOID

0.01219

U parameter

0.8

Next Earth close approach

Date

2030-10-02

Nominal distance (from Earth center)

0.03306

4945026

Maximum Brightness

17.7

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

23.4

mag

Diameter

70*

Taxonomic type

Rotation period (T)

5.880

Discovery Information

Discovery Date

2009-10-16

Observatory

Catalina Sky Survey

Orbit Visualiser

Click the button to start Orbit Visualiser

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion
Aphelion
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period
U parameter

Value

1-sigma variation

Unit

Epoch

Value

60200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.788646

1-sigma variation

2.780E-9

Unit

Eccentricity (e)

Value

0.375247

1-sigma variation

4.280E-7

Unit

Inclination (i)

Value

4.9639

1-sigma variation

1.249E-5

Unit

Ascending Node (Ω)

Value

13.8009

1-sigma variation

1.168E-5

Unit

Arg. of Perihelion (ω)

Value

201.9488

1-sigma variation

4.440E-5

Unit

Mean Anomaly (M)

Value

99.76319

1-sigma variation

0.00011

Unit

Perihelion

Value

0.492710

1-sigma variation

Unit

Aphelion

Value

1.084583

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.039634

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.498719

1-sigma variation

Unit

MOID

Value

0.012187

1-sigma variation

Unit

Orbit Period

Value

255.8125

1-sigma variation

Unit

U parameter

Value

0.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	7.72914E-18	-1.17521E-15	-2.87016E-14	1.43961E-14	-1.20488E-13	2.97649E-13
e	-1.17521E-15	1.83166E-13	4.31027E-12	-2.00003E-12	1.82982E-11	-4.60070E-11
i	-2.87016E-14	4.31027E-12	1.55961E-10	-1.05825E-10	4.97722E-10	-1.10140E-9
Ω	1.43961E-14	-2.00003E-12	-1.05825E-10	1.36527E-10	-3.18314E-10	5.12099E-10
ω	-1.20488E-13	1.82982E-11	4.97722E-10	-3.18314E-10	1.97114E-9	-4.64346E-9
M	2.97649E-13	-4.60070E-11	-1.10140E-9	5.12099E-10	-4.64346E-9	1.16300E-8

Date of computation: 2023-10-02 11:58 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

5.880

Unit

Source

[1]

Quality

Value

Unit

Source

[1]

Amplitude

Value

0.38

Unit

mag

Source

[1]

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

23.402

Unit

mag

Source

[2]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[2]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

Unit

Source

[-]

Diameter

Value

70*

Unit

Source

[3]

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]	EARN	1.) Warner, B.D. (2017) Minor Planet Bul. 44, 98-107.
[2]	ESA ODIM	ESA orbit determination and impact monitoring system
[3]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved

Arc Information

Value

Unit

Source

Arc Length

Value

5098

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Astrometry Summary

RMS of Residuals
First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

RMS of Residuals

Value

0.68618

Unit

arcsec

Source

[1]

First Observation

Value

2009-10-16.22207

Unit

Source

[2]

Last Observation

Value

2023-10-01.333341

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

168 (6)

Unit

Source

[1]

Radar Summary

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

Radar

Value

Unit

Source

First Observation

Value

2023-09-29

Unit

Source

[3]

Last Observation

Value

2023-09-29

Unit

Source

[3]

Delay (Discarded)

Value

1 (1)

Unit

Source

[1]

Doppler (Discarded)

Value

2 (1)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

3 (2)

Unit

Source

[1]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA ODIM	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 2009UG from 1950 to 2123

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possibile distance in au	Distance uncert. in au
EARTH	1955-10-10 09:28	< 1 min	0.0669235	0.0669207	0.0000009
EARTH	1962-09-29 14:60	< 1 min	0.0144397	0.0144395	0.0000001
VENUS	1963-04-27 12:19	< 1 min	0.0198847	0.0198844	0.0000001
EARTH	1967-12-01 21:40	< 1 min	0.1793501	0.1793468	0.0000011
EARTH	1969-09-27 05:44	< 1 min	0.0523941	0.0523931	0.0000003
EARTH	1974-12-02 20:05	< 1 min	0.1122463	0.1122435	0.0000009
EARTH	1976-09-27 07:36	< 1 min	0.1328575	0.1328563	0.0000004
VENUS	1977-02-15 17:19	< 1 min	0.0497261	0.0497222	0.0000013
EARTH	1981-12-01 05:06	< 1 min	0.0718719	0.0718714	0.0000002
EARTH	1983-09-29 16:08	< 1 s	0.1962595	0.1962581	0.0000005
EARTH	1988-11-26 07:03	< 1 s	0.0725066	0.0725056	0.0000003
MERCURY	1989-11-12 18:50	< 1 min	0.0482993	0.0482981	0.0000004
VENUS	1993-06-20 03:16	< 1 min	0.0279500	0.0279483	0.0000006
EARTH	1995-11-13 21:10	< 1 min	0.0938665	0.0938654	0.0000004
VENUS	1998-05-20 08:06	< 1 min	0.0441219	0.0441205	0.0000005
EARTH	2002-10-24 12:01	< 1 min	0.0948053	0.0948043	0.0000003
EARTH	2009-10-07 07:05	< 1 min	0.0581912	0.0581908	0.0000001
VENUS	2012-03-11 18:35	< 1 min	0.0446570	0.0446536	0.0000011
EARTH	2016-09-29 21:38	< 1 s	0.0163424	0.0163423	0.0000000
MERCURY	2021-06-04 11:36	< 1 min	0.0485938	0.0485936	0.0000000
EARTH	2023-09-30 13:25	< 1 s	0.0157023	0.0157022	0.0000000
EARTH	2030-10-02 17:11	< 1 min	0.0330555	0.0330550	0.0000002
EARTH	2037-10-14 05:27	< 1 min	0.0772348	0.0772338	0.0000003
MERCURY	2043-02-03 14:12	< 1 min	0.0480517	0.0480505	0.0000004
EARTH	2044-10-27 23:17	< 1 min	0.0965877	0.0965866	0.0000004
MERCURY	2050-02-01 03:59	< 1 min	0.0487593	0.0487583	0.0000003
EARTH	2051-11-12 12:60	< 1 min	0.0933818	0.0933809	0.0000003
VENUS	2054-05-15 16:36	< 1 min	0.0166506	0.0166497	0.0000003
EARTH	2058-11-21 18:60	< 1 min	0.0819717	0.0819703	0.0000005
EARTH	2065-11-26 11:06	1.0	0.0735109	0.0735084	0.0000008
EARTH	2072-11-29 06:18	< 1 min	0.0710589	0.0710575	0.0000005
EARTH	2074-09-29 09:45	< 1 min	0.1978551	0.1978311	0.0000080
VENUS	2078-08-20 12:44	< 1 min	0.0376182	0.0376062	0.0000040
EARTH	2079-12-01 12:21	< 1 min	0.0749051	0.0748988	0.0000021
EARTH	2081-09-28 10:32	< 1 min	0.1649430	0.1649184	0.0000082
MERCURY	2086-06-14 01:16	2.2	0.0466441	0.0466412	0.0000009
EARTH	2086-12-02 15:28	< 1 min	0.0984677	0.0984523	0.0000052
EARTH	2088-09-27 09:44	< 1 min	0.1175349	0.1175096	0.0000084
EARTH	2093-12-02 06:54	< 1 min	0.1360707	0.1360566	0.0000047
VENUS	2094-01-06 16:44	< 1 min	0.0326421	0.0326401	0.0000007
EARTH	2095-09-27 22:38	< 1 min	0.0673051	0.0672846	0.0000069
EARTH	2100-12-02 05:34	< 1 min	0.1823767	0.1823598	0.0000056
EARTH	2102-09-29 14:17	< 1 min	0.0250543	0.0250375	0.0000056
VENUS	2105-06-06 05:58	< 1 min	0.0413086	0.0413057	0.0000010
EARTH	2107-12-02 21:53	< 1 min	0.1907590	0.1907477	0.0000038
EARTH	2109-09-29 04:24	< 1 min	0.0282281	0.0282105	0.0000059
EARTH	2114-12-03 17:43	< 1 min	0.1574040	0.1573811	0.0000077
EARTH	2116-09-28 08:09	< 1 min	0.0713090	0.0712881	0.0000070
EARTH	2121-12-04 03:10	< 1 min	0.1206277	0.1206168	0.0000036
EARTH	2123-09-29 10:59	< 1 min	0.1158870	0.1158798	0.0000024

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