Asteroids

2010RA91 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.760

Aphelion (Q)

1.574

Eccentricity (e)

0.349

Inclination (i)

5.6

deg

Orbit period (P)

460.3

Earth MOID

0.00279

U parameter

1.4

Next Earth close approach

Date

2026-03-22

Nominal distance (from Earth center)

0.012

1795556

Maximum Brightness

16.2

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

23.4

mag

Diameter

50 - 120*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2010-09-13

Observatory

Kachina Observatory, Flagstaff

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

1.166691

1-sigma variation

2.984E-8

Unit

Eccentricity (e)

Value

0.348990

1-sigma variation

4.151E-7

Unit

Inclination (i)

Value

5.6145

1-sigma variation

6.472E-6

Unit

Long. of Ascending Node (Ω)

Value

183.5690

1-sigma variation

2.297E-5

Unit

Arg. of Perihelion (ω)

Value

272.7207

1-sigma variation

3.819E-5

Unit

Mean Anomaly (M)

Value

312.50344

1-sigma variation

0.00017

Unit

Perihelion distance

Value

0.759528

1-sigma variation

Unit

Aphelion distance

Value

1.573855

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.009709

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.038923

1-sigma variation

Unit

MOID

Value

0.002789

1-sigma variation

Unit

Orbit Period

Value

460.2909

1-sigma variation

Unit

U parameter

Value

1.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	8.90610E-16	1.23557E-14	-6.60544E-14	4.13435E-13	1.00770E-12	-5.09986E-12
e	1.23557E-14	1.72285E-13	-9.04821E-13	5.58355E-12	1.39491E-11	-7.04306E-11
i	-6.60544E-14	-9.04821E-13	4.18880E-11	-7.73002E-11	-2.27827E-11	3.72240E-10
Ω	4.13435E-13	5.58355E-12	-7.73002E-11	5.27649E-10	2.59441E-10	-2.53214E-9
ω	1.00770E-12	1.39491E-11	-2.27827E-11	2.59441E-10	1.45815E-9	-5.90170E-9
M	-5.09986E-12	-7.04306E-11	3.72240E-10	-2.53214E-9	-5.90170E-9	2.95877E-8

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

23.439

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

50 - 120*

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

3901

Unit

Source

[1]

Unobserved

Value

1770

Unit

Source

[1]

Normalized RMS of residuals

Value

0.617909

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2010-09-01.26565

Unit

Source

[2]

Last Observation

Value

2021-05-07.30631

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

121 (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

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 2010RA91 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	1958-03-21 15:31	< 1 min	0.0172054	0.0172032	0.0000007
EARTH	1963-04-02 06:11	< 1 min	0.1902004	0.1901988	0.0000005
EARTH	1971-09-24 08:17	< 1 min	0.1671998	0.1671943	0.0000018
EARTH	1976-10-04 22:28	< 1 min	0.0367697	0.0367651	0.0000015
EARTH	1992-03-17 03:52	< 1 min	0.0676364	0.0676192	0.0000057
EARTH	1997-03-31 02:22	< 1 min	0.1562715	0.1562562	0.0000051
EARTH	2005-09-24 04:04	< 1 min	0.1625507	0.1625470	0.0000012
EARTH	2010-10-07 07:29	< 1 min	0.0605437	0.0605432	0.0000002
EARTH	2026-03-22 01:12	< 1 min	0.0120025	0.0119964	0.0000021
EARTH	2031-03-28 17:38	1.4	0.1012517	0.1011880	0.0000212
EARTH	2049-09-25 03:44	4.9	0.1353088	0.1350935	0.0000717
EARTH	2054-10-01 15:10	6.2	0.0211253	0.0209348	0.0000636
EARTH	2059-10-03 17:04	10.8	0.0152373	0.0149733	0.0000887
EARTH	2064-10-14 12:06	60.9	0.1242076	0.1234069	0.0002669
EARTH	2085-02-09 06:06	620.9	0.1922452	0.1906582	0.0005292
EARTH	2090-03-15 09:39	180.5	0.0925601	0.0891403	0.0011399
EARTH	2095-03-24 12:43	91.2	0.0178789	0.0146750	0.0010691
EARTH	2108-09-28 17:44	1292.1	0.0972877	0.0458482	0.0172874
EARTH	2113-10-13 08:56	> 1 d	0.1068351	0.0488014	0.0193974

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
65.61334065	79.73418374	0.00278902	MINIMUM
293.53430187	269.29448239	0.01079603	MINIMUM
359.42458730	354.29418716	0.23951132	SADDLE
179.72704946	174.74867181	0.56937830	SADDLE
359.62938701	174.58804264	1.77554079	SADDLE
179.87640051	354.85606512	2.55457029	MAXIMUM

Download:

MOID Plots

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