Asteroids

2011UK10 help

Last update: 2026-10-20 13:16 UTC

Orbital Properties

Epoch

61400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.909

Aphelion (Q)

1.540

Eccentricity (e)

0.258

Inclination (i)

6.1

deg

Orbit period (P)

495.0

Earth MOID

0.00022

U parameter

1.2

Next Earth close approach

Date

2045-08-24

Nominal distance (from Earth center)

0.12763

19093697

Maximum Brightness

26.8

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

24.9

mag

Diameter

28 - 60*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2011-10-18

Observatory

Pan-STARRS 1, Haleakala

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

61400.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.224675

1-sigma variation

3.458E-8

Unit

Eccentricity (e)

Value

0.257600

1-sigma variation

3.856E-7

Unit

Inclination (i)

Value

6.0963

1-sigma variation

1.646E-5

Unit

Long. of Ascending Node (Ω)

Value

196.7152

1-sigma variation

8.202E-6

Unit

Arg. of Perihelion (ω)

Value

124.6704

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

89.92413

1-sigma variation

0.00005

Unit

Perihelion distance

Value

0.909199

1-sigma variation

Unit

Aphelion distance

Value

1.540152

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.339609

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.000469

1-sigma variation

Unit

MOID

Value

0.000220

1-sigma variation

Unit

Orbit Period

Value

495.0282

1-sigma variation

Unit

U parameter

Value

1.2

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.19570E-15	1.28882E-14	5.12902E-13	9.68896E-14	-3.79129E-12	1.59051E-12
e	1.28882E-14	1.48650E-13	5.71380E-12	9.82111E-13	-4.37888E-11	1.84408E-11
i	5.12902E-13	5.71380E-12	2.71034E-10	7.55041E-11	-1.72386E-9	7.10917E-10
Ω	9.68896E-14	9.82111E-13	7.55041E-11	6.72647E-11	-3.46792E-10	1.19160E-10
ω	-3.79129E-12	-4.37888E-11	-1.72386E-9	-3.46792E-10	1.29719E-8	-5.44202E-9
M	1.59051E-12	1.84408E-11	7.10917E-10	1.19160E-10	-5.44202E-9	2.29623E-9

Date of computation: 2026-10-20 13:16 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

24.912

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

28 - 60*

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

Unit

Source

[-]

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Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

5480

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.565305

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2011-10-18.50294

Unit

Source

[2]

Last Observation

Value

2026-10-19.556247

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

85 (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

Unit

Source

[-]

Last Observation

Value

Unit

Source

[-]

Delay (Discarded)

Value

0 (0)

Unit

Source

[-]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[-]

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

Filters

Initial Date: *

Final Date: *

Normalised Only accepted

Max residual (arcsec):

* - these fields are required

Plot

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

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 2011UK10 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	1952-09-23 22:40	< 1 min	0.0760212	0.0760152	0.0000020
EARTH	1963-08-10 01:18	< 1 min	0.1344338	0.1344321	0.0000006
EARTH	1974-06-14 22:15	< 1 min	0.1043023	0.1042998	0.0000008
EARTH	1985-06-01 22:04	< 1 min	0.1353788	0.1353697	0.0000030
EARTH	2000-10-17 06:36	< 1 min	0.0785881	0.0785748	0.0000045
EARTH	2011-10-09 11:13	< 1 s	0.0112574	0.0112571	0.0000001
EARTH	2026-10-09 02:16	< 1 s	0.0130687	0.0130685	0.0000001
EARTH	2045-08-24 09:40	3.4	0.1276335	0.1276299	0.0000012
EARTH	2064-06-09 01:08	< 1 min	0.0983563	0.0983512	0.0000017
EARTH	2068-10-12 22:58	< 1 min	0.0239064	0.0238855	0.0000070
EARTH	2083-08-03 09:50	66.6	0.1373700	0.1373594	0.0000035
EARTH	2098-06-01 06:37	11.9	0.1345445	0.1342133	0.0001106
EARTH	2102-10-11 22:30	27.7	0.0020301	0.0018746	0.0000687
EARTH	2106-10-19 04:34	> 1 d	0.0831160	0.0040687	0.0649862
EARTH	2110-10-25 20:47	> 1 d	0.1938738	0.0085400	0.1076495

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
43.99281056	274.79996332	0.00022030	MINIMUM
307.58199462	152.58200786	0.09540854	MINIMUM
349.41285052	205.21210842	0.13755422	SADDLE
176.80319056	35.77303974	0.56437263	SADDLE
357.28108191	35.60591252	1.89377070	SADDLE
179.08243311	217.50526586	2.54936647	MAXIMUM

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MOID Plots

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