Asteroids

2011CL50 help

Last update: 2025-11-24 16:53 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.754

Aphelion (Q)

1.011

Eccentricity (e)

0.146

Inclination (i)

0.2

deg

Orbit period (P)

302.7

Earth MOID

0.00124

U parameter

0.3

Next Earth close approach

Date

2026-02-27

Nominal distance (from Earth center)

0.03432

5133872

Maximum Brightness

24.2

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

27.2

mag

Diameter

9 - 21*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2011-02-12

Observatory

Mt. Lemmon Survey

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

0.882329

1-sigma variation

4.135E-9

Unit

Eccentricity (e)

Value

0.145880

1-sigma variation

4.009E-8

Unit

Inclination (i)

Value

0.1865

1-sigma variation

6.077E-7

Unit

Long. of Ascending Node (Ω)

Value

354.7704

1-sigma variation

0.0004

Unit

Arg. of Perihelion (ω)

Value

308.6443

1-sigma variation

0.0004

Unit

Mean Anomaly (M)

Value

110.83635

1-sigma variation

0.00002

Unit

Perihelion distance

Value

0.753614

1-sigma variation

Unit

Aphelion distance

Value

1.011043

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.214142

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.045425

1-sigma variation

Unit

MOID

Value

0.001242

1-sigma variation

Unit

Orbit Period

Value

302.7221

1-sigma variation

Unit

U parameter

Value

0.3

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.71021E-17	-1.37409E-16	1.22434E-15	-8.34649E-13	7.45571E-13	7.22234E-14
e	-1.37409E-16	1.60699E-15	-7.41808E-15	7.30457E-12	-6.40565E-12	-9.17837E-13
i	1.22434E-15	-7.41808E-15	3.69293E-13	-1.88424E-10	1.83852E-10	2.09262E-12
Ω	-8.34649E-13	7.30457E-12	-1.88424E-10	1.47718E-7	-1.43540E-7	-3.34124E-9
ω	7.45571E-13	-6.40565E-12	1.83852E-10	-1.43540E-7	1.39906E-7	2.82152E-9
M	7.22234E-14	-9.17837E-13	2.09262E-12	-3.34124E-9	2.82152E-9	5.60556E-10

Date of computation: 2025-11-24 16:53 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

27.237

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

9 - 21*

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

3628

Unit

Source

[1]

Unobserved

Value

1841

Unit

Source

[1]

Normalized RMS of residuals

Value

0.949686

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2011-02-12.46221

Unit

Source

[2]

Last Observation

Value

2021-01-18.908956

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

133 (5)

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

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 2011CL50 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	1956-01-05 18:43	198.2	0.0240414	0.0201281	0.0013047
EARTH	1956-05-10 19:12	> 1 d	0.1618130	0.1590915	0.0009072
EARTH	1961-03-04 16:08	249.6	0.0157213	0.0150618	0.0002201
EARTH	1966-02-25 08:22	352.9	0.0226991	0.0222057	0.0001645
EARTH	1971-01-15 00:03	52.4	0.0162184	0.0160976	0.0000403
EARTH	1976-02-28 18:04	3.5	0.0157235	0.0157136	0.0000033
EARTH	1981-01-25 17:44	45.3	0.0269742	0.0269481	0.0000087
EARTH	1986-01-07 23:19	3.5	0.0145494	0.0145394	0.0000033
EARTH	1991-02-24 01:37	< 1 min	0.0166375	0.0166362	0.0000004
EARTH	1996-02-03 06:57	1.8	0.0290373	0.0290367	0.0000002
EARTH	2001-01-05 11:21	< 1 min	0.0182924	0.0182919	0.0000002
EARTH	2006-01-26 16:53	< 1 min	0.0290178	0.0290177	0.0000000
EARTH	2011-02-19 17:23	< 1 s	0.0159764	0.0159762	0.0000001
EARTH	2016-01-05 04:06	< 1 min	0.0217706	0.0217706	0.0000000
EARTH	2020-12-28 09:53	< 1 s	0.0144734	0.0144734	0.0000000
EARTH	2025-10-19 03:28	< 1 min	0.1683107	0.1683104	0.0000001
EARTH	2026-02-27 17:06	< 1 min	0.0343178	0.0343174	0.0000001
EARTH	2039-12-17 12:56	< 1 min	0.1782012	0.1781985	0.0000009
EARTH	2045-01-07 22:29	1.0	0.0231937	0.0231925	0.0000004
EARTH	2050-02-26 21:56	< 1 min	0.1878671	0.1878616	0.0000018
VENUS	2053-09-17 11:19	1.4	0.0382817	0.0382757	0.0000020
EARTH	2058-12-16 00:22	< 1 min	0.1550551	0.1550296	0.0000085
EARTH	2064-02-04 15:48	10.5	0.0243454	0.0243338	0.0000039
EARTH	2069-02-27 12:29	< 1 min	0.1519863	0.1519419	0.0000148
EARTH	2082-12-14 01:28	< 1 min	0.0800047	0.0799405	0.0000214
EARTH	2083-05-11 21:05	20.2	0.1956857	0.1956680	0.0000059
EARTH	2088-02-05 12:55	38.7	0.0241473	0.0240919	0.0000185
EARTH	2092-09-30 22:10	25.0	0.1950847	0.1950513	0.0000111
EARTH	2093-02-27 20:45	1.6	0.0784729	0.0784217	0.0000171
VENUS	2099-03-23 00:51	17.5	0.0343954	0.0343469	0.0000164
EARTH	2111-12-15 00:45	13.8	0.0702157	0.0683199	0.0006319
EARTH	2112-05-09 04:57	1044.2	0.1901945	0.1893006	0.0002980
EARTH	2117-01-25 13:42	282.4	0.0278007	0.0277204	0.0000268
EARTH	2121-10-02 19:53	849.5	0.1933153	0.1925689	0.0002488
EARTH	2122-03-01 00:47	5.2	0.0741964	0.0726344	0.0005207

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
213.40609255	50.39013056	0.00124177	MINIMUM
142.07066174	349.24654025	0.00324134	MINIMUM
177.70631539	19.79943641	0.02650518	SADDLE
357.02312782	199.09667410	0.26344329	SADDLE
357.11215496	19.18763383	1.73824585	SADDLE
177.71036142	199.79222966	2.02804875	MAXIMUM

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MOID Plots

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