Asteroids

2011AX22 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.641

Aphelion (Q)

1.292

Eccentricity (e)

0.337

Inclination (i)

0.7

deg

Orbit period (P)

347.1

Earth MOID

0.00122

U parameter

2.9

Next Earth close approach

Date

2030-01-03

Nominal distance (from Earth center)

0.05001

7481044

Maximum Brightness

21.8

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

24.8

mag

Diameter

29 - 70*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2011-01-10

Observatory

Catalina Sky 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

0.966643

1-sigma variation

1.501E-7

Unit

Eccentricity (e)

Value

0.336793

1-sigma variation

0.000002

Unit

Inclination (i)

Value

0.6850

1-sigma variation

1.579E-5

Unit

Long. of Ascending Node (Ω)

Value

58.0068

1-sigma variation

0.0029

Unit

Arg. of Perihelion (ω)

Value

291.0233

1-sigma variation

0.0027

Unit

Mean Anomaly (M)

Value

311.51901

1-sigma variation

0.00198

Unit

Perihelion distance

Value

0.641085

1-sigma variation

Unit

Aphelion distance

Value

1.292202

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.224457

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.037009

1-sigma variation

Unit

MOID

Value

0.001220

1-sigma variation

Unit

Orbit Period

Value

347.1346

1-sigma variation

Unit

U parameter

Value

2.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.25447E-14	-3.04123E-13	-4.82330E-13	3.29272E-11	-9.28683E-12	-2.68268E-10
e	-3.04123E-13	4.22786E-12	8.78038E-12	1.93906E-10	-4.47851E-10	3.34884E-9
i	-4.82330E-13	8.78038E-12	2.49389E-10	3.93713E-8	-3.78741E-8	-1.24116E-9
Ω	3.29272E-11	1.93906E-10	3.93713E-8	8.36291E-6	-7.74646E-6	-2.39391E-6
ω	-9.28683E-12	-4.47851E-10	-3.78741E-8	-7.74646E-6	7.21212E-6	1.91406E-6
M	-2.68268E-10	3.34884E-9	-1.24116E-9	-2.39391E-6	1.91406E-6	3.91940E-6

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

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

24.804

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

29 - 70*

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

[-]

Download this part as:

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

406

Unit

Source

[1]

Unobserved

Value

4958

Unit

Source

[1]

Normalized RMS of residuals

Value

0.713492

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2011-01-10.30552

Unit

Source

[2]

Last Observation

Value

2012-02-20.38156

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

68 (1)

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 2011AX22 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	1952-05-13 18:16	1.5	0.0560055	0.0523857	0.0012066
EARTH	1969-01-05 04:02	29.0	0.1344852	0.1328878	0.0005325
EARTH	1970-01-05 22:31	90.8	0.1360932	0.1348540	0.0004130
VENUS	1970-09-02 21:58	117.8	0.0398382	0.0387279	0.0003713
EARTH	1974-05-13 01:57	4.9	0.0187482	0.0184907	0.0000858
EARTH	1990-01-06 19:56	16.0	0.1581865	0.1572580	0.0003095
EARTH	1991-01-05 03:11	46.9	0.1257290	0.1249254	0.0002679
EARTH	1994-04-28 09:14	68.3	0.1866142	0.1862181	0.0001320
EARTH	1995-05-11 15:31	6.8	0.0771379	0.0766714	0.0001555
VENUS	1998-05-04 13:38	6.3	0.0177063	0.0176719	0.0000116
EARTH	2011-01-01 19:29	< 1 min	0.0270017	0.0269991	0.0000009
EARTH	2015-05-12 04:45	< 1 min	0.0516250	0.0515956	0.0000098
EARTH	2030-01-03 12:05	1.8	0.0500077	0.0498975	0.0000367
EARTH	2034-05-13 18:48	< 1 min	0.0140022	0.0139780	0.0000080
VENUS	2040-05-17 17:42	11.2	0.0271958	0.0270056	0.0000637
EARTH	2051-01-01 11:46	4.5	0.0160369	0.0155094	0.0001768
EARTH	2055-05-13 08:04	15.5	0.0030559	0.0022654	0.0002678
VENUS	2059-03-28 19:57	> 1 d	0.0216470	0.0156939	0.0219867
VENUS	2063-02-23 21:01	> 1 d	0.0288594	0.0180084	0.0445701
EARTH	2067-01-05 07:31	628.3	0.0124059	0.0094225	0.0246177
EARTH	2070-05-10 14:14	> 1 d	0.0834568	0.0032113	0.0719953
EARTH	2081-01-09 20:12	> 1 d	0.1523869	0.0090092	0.1502531
EARTH	2084-05-12 17:43	> 1 d	0.0560483	0.0017416	0.1219918
EARTH	2096-01-05 06:06	260.4	0.0373211	0.0092840	0.1829750
EARTH	2099-05-09 10:58	> 1 d	0.1193546	0.0017050	0.1720681
EARTH	2110-01-07 23:17	> 1 d	0.0658760	0.0085195	0.0279458
EARTH	2113-05-13 04:18	> 1 d	0.0201802	0.0003003	0.0915153
EARTH	2124-01-09 05:01	> 1 w	0.0711517	0.0094663	0.4462178

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
262.29649057	129.30715445	0.00115637	MINIMUM
92.95214860	359.24896386	0.00817091	MINIMUM
178.15529322	64.84998221	0.29928505	SADDLE
356.32225176	242.88848243	0.36582523	SADDLE
356.38808867	62.96347287	1.63400592	SADDLE
178.15700652	244.84212633	2.29870830	MAXIMUM

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MOID Plots

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