Asteroids

2010RF12 help

Last update: 2026-06-04 23:11 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.862

Aphelion (Q)

1.261

Eccentricity (e)

0.188

Inclination (i)

0.9

deg

Orbit period (P)

399.4

Earth MOID

0.00058

U parameter

0.0

Next Earth close approach

Date

2034-07-16

Nominal distance (from Earth center)

0.19675

29432803

Maximum Brightness

26.4

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

28.5

mag

Diameter

5 - 12*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2010-09-05

Observatory

University of Arizona 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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.061431

1-sigma variation

1.614E-10

Unit

Eccentricity (e)

Value

0.188309

1-sigma variation

2.200E-8

Unit

Inclination (i)

Value

0.8827

1-sigma variation

9.833E-7

Unit

Long. of Ascending Node (Ω)

Value

163.6874

1-sigma variation

2.807E-6

Unit

Arg. of Perihelion (ω)

Value

267.4400

1-sigma variation

4.393E-6

Unit

Mean Anomaly (M)

Value

86.31951

1-sigma variation

2.277E-6

Unit

Perihelion distance

Value

0.861554

1-sigma variation

Unit

Aphelion distance

Value

1.261307

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.041284

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.006518

1-sigma variation

Unit

MOID

Value

0.000580

1-sigma variation

Unit

Orbit Period

Value

399.4256

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.60495E-20	2.77023E-18	8.88952E-19	1.57325E-17	3.78285E-16	-1.14401E-16
e	2.77023E-18	4.83786E-16	2.22338E-15	7.65166E-15	7.07796E-14	-3.90093E-14
i	8.88952E-19	2.22338E-15	9.66904E-13	1.93579E-12	-1.45702E-12	-3.09618E-13
Ω	1.57325E-17	7.65166E-15	1.93579E-12	7.87773E-12	-6.53010E-12	-7.22192E-13
ω	3.78285E-16	7.07796E-14	-1.45702E-12	-6.53010E-12	1.92986E-11	-7.16989E-12
M	-1.14401E-16	-3.90093E-14	-3.09618E-13	-7.22192E-13	-7.16989E-12	5.18480E-12

Date of computation: 2026-06-04 23:11 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

28.492

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

5 - 12*

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

4375

Unit

Source

[1]

Unobserved

Value

1405

Unit

Source

[1]

Normalized RMS of residuals

Value

0.584398

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2010-09-01.324713

Unit

Source

[2]

Last Observation

Value

2022-08-24.023164

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

344 (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

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 2010RF12 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	1995-04-10 11:49	< 1 min	0.1750403	0.1750338	0.0000022
EARTH	1996-04-06 13:32	< 1 min	0.1120454	0.1120396	0.0000019
EARTH	1997-04-03 16:38	< 1 min	0.0560500	0.0560457	0.0000014
EARTH	1998-04-01 01:03	< 1 min	0.0270753	0.0270753	0.0000000
EARTH	1999-03-28 20:14	< 1 min	0.0505738	0.0505705	0.0000011
EARTH	2000-03-11 20:38	1.1	0.0945887	0.0945851	0.0000012
EARTH	2001-02-13 23:05	1.8	0.1297564	0.1297540	0.0000008
EARTH	2001-05-08 11:58	1.6	0.1343789	0.1343766	0.0000008
EARTH	2002-01-26 21:00	1.9	0.1525007	0.1524992	0.0000005
EARTH	2002-05-27 04:47	1.6	0.1548905	0.1548892	0.0000004
EARTH	2003-01-11 04:31	1.9	0.1664504	0.1664495	0.0000003
EARTH	2003-06-11 17:38	1.6	0.1648676	0.1648671	0.0000002
EARTH	2003-12-27 11:43	1.9	0.1731272	0.1731269	0.0000001
EARTH	2004-06-25 07:12	1.6	0.1660382	0.1660379	0.0000001
EARTH	2004-12-11 21:59	2.0	0.1730768	0.1730765	0.0000001
EARTH	2005-07-09 23:20	1.6	0.1588280	0.1588270	0.0000003
EARTH	2005-11-26 16:49	2.0	0.1660133	0.1660123	0.0000003
EARTH	2006-07-25 21:22	1.6	0.1423512	0.1423493	0.0000006
EARTH	2006-11-09 12:03	2.1	0.1505023	0.1505005	0.0000006
EARTH	2007-08-13 23:08	1.4	0.1147343	0.1147312	0.0000010
EARTH	2007-10-17 06:06	2.0	0.1232001	0.1231969	0.0000011
EARTH	2008-09-05 02:38	< 1 min	0.0726228	0.0726186	0.0000014
EARTH	2009-09-09 08:41	< 1 s	0.0272967	0.0272931	0.0000012
EARTH	2010-09-08 21:11	< 1 s	0.0005306	0.0005306	0.0000000
EARTH	2012-02-26 08:24	< 1 s	0.0958455	0.0958452	0.0000001
EARTH	2022-09-23 19:33	< 1 s	0.0687868	0.0687867	0.0000000
EARTH	2024-03-01 10:53	< 1 s	0.1845632	0.1845630	0.0000001
EARTH	2034-07-16 23:26	< 1 s	0.1967461	0.1967461	0.0000000
EARTH	2034-12-02 15:50	< 1 s	0.1251065	0.1251064	0.0000000
EARTH	2035-04-10 21:51	< 1 min	0.1889489	0.1889488	0.0000000
EARTH	2045-08-29 17:22	< 1 s	0.1674213	0.1674212	0.0000000
EARTH	2047-02-09 21:11	< 1 s	0.0580160	0.0580158	0.0000000
EARTH	2057-08-31 22:05	< 1 s	0.1150739	0.1150735	0.0000001
EARTH	2059-02-17 12:04	< 1 min	0.0236422	0.0236420	0.0000001
EARTH	2070-08-05 07:46	< 1 min	0.1512608	0.1512598	0.0000003
EARTH	2070-11-01 06:43	< 1 min	0.1166878	0.1166874	0.0000001
EARTH	2082-08-31 00:17	< 1 min	0.1056628	0.1056600	0.0000009
EARTH	2084-02-13 08:07	< 1 min	0.0511884	0.0511855	0.0000010
EARTH	2095-09-05 23:46	< 1 min	0.0007578	0.0007518	0.0000020
EARTH	2115-04-17 10:46	789.0	0.0312114	0.0095370	0.0273812
EARTH	2116-02-07 17:00	> 1 w	0.1693983	0.1601299	0.0030917
EARTH	2116-06-12 15:25	> 1 w	0.1377996	0.1278033	0.0033448
EARTH	2116-12-12 18:07	> 1 d	0.1926719	0.1873851	0.0017629
EARTH	2117-08-25 00:45	> 1 d	0.0800716	0.0500895	0.0100054
EARTH	2118-09-02 17:56	> 1 d	0.1583156	0.0763262	0.0273366

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
285.48619947	245.47712416	0.00060295	MINIMUM
68.95696614	48.52753282	0.00345137	MINIMUM
356.79539157	326.57682325	0.12530969	SADDLE
177.79194810	147.57614910	0.24634825	SADDLE
356.63229666	146.40080395	1.87704868	SADDLE
177.83226463	327.62232349	2.24729996	MAXIMUM

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MOID Plots

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