Asteroids

2012XF55 help

Last update: 2026-01-19 12:46 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.957

Aphelion (Q)

1.595

Eccentricity (e)

0.250

Inclination (i)

1.5

deg

Orbit period (P)

526.4

Earth MOID

0.02134

U parameter

0.0

Next Earth close approach

Date

2026-02-23

Nominal distance (from Earth center)

0.04185

6260723

Maximum Brightness

22.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

22.7

mag

Diameter

80 - 170*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2012-12-07

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.275896

1-sigma variation

1.584E-9

Unit

Eccentricity (e)

Value

0.250227

1-sigma variation

3.201E-8

Unit

Inclination (i)

Value

1.5391

1-sigma variation

3.968E-6

Unit

Long. of Ascending Node (Ω)

Value

251.6199

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

267.4555

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

292.45534

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.956632

1-sigma variation

Unit

Aphelion distance

Value

1.595159

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.194229

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.196548

1-sigma variation

Unit

MOID

Value

0.021344

1-sigma variation

Unit

Orbit Period

Value

526.4063

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.50751E-18	-3.03459E-17	3.06308E-16	-7.15516E-15	1.43608E-17	1.44020E-15
e	-3.03459E-17	1.02495E-15	-1.54528E-14	-4.17983E-14	2.03040E-13	-1.86870E-14
i	3.06308E-16	-1.54528E-14	1.57420E-11	1.80828E-10	-1.66329E-10	-1.59891E-11
Ω	-7.15516E-15	-4.17983E-14	1.80828E-10	6.88774E-9	-6.91353E-9	2.52557E-11
ω	1.43608E-17	2.03040E-13	-1.66329E-10	-6.91353E-9	7.12798E-9	-1.71167E-10
M	1.44020E-15	-1.86870E-14	-1.59891E-11	2.52557E-11	-1.71167E-10	1.29975E-10

Date of computation: 2026-01-19 12:46 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

22.743

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

80 - 170*

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

4791

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.528213

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2012-12-07.22787

Unit

Source

[2]

Last Observation

Value

2026-01-19.273267

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

123 (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

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 2012XF55 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	1954-02-03 12:06	< 1 min	0.0279360	0.0279348	0.0000004
EARTH	1967-01-20 20:09	< 1 min	0.0331930	0.0331922	0.0000003
MARS	1968-02-28 07:54	< 1 min	0.0441091	0.0441088	0.0000001
EARTH	1990-02-20 13:34	< 1 min	0.0408711	0.0408708	0.0000001
EARTH	2013-04-22 18:37	< 1 min	0.0840777	0.0840773	0.0000001
EARTH	2026-02-23 23:13	< 1 min	0.0418503	0.0418502	0.0000001
EARTH	2039-01-12 20:59	< 1 s	0.0957362	0.0957357	0.0000002
EARTH	2062-04-10 01:34	< 1 min	0.0209902	0.0209900	0.0000001
EARTH	2075-02-28 08:32	2.2	0.0431110	0.0431105	0.0000002
EARTH	2088-01-24 12:16	< 1 min	0.0265512	0.0265508	0.0000001
EARTH	2111-03-05 21:33	1.7	0.0435252	0.0435251	0.0000000

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
32.22343607	97.71278140	0.02134383	MINIMUM
334.49200186	24.75702033	0.02178955	MINIMUM
3.42191222	61.28332877	0.04397036	SADDLE
182.10361837	239.93824413	0.58644734	SADDLE
3.55174613	241.43459610	1.96596321	SADDLE
182.06370456	59.89775809	2.58672462	MAXIMUM

Download:

MOID Plots

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