Asteroids

523664 2012OD1 help

Last update: 2026-03-17 23:26 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Aten

Perihelion (q)

0.412

Aphelion (Q)

1.246

Eccentricity (e)

0.503

Inclination (i)

42.3

deg

Orbit period (P)

275.6

Earth MOID

0.03843

U parameter

0.0

Next Earth close approach

Date

2027-07-31

Nominal distance (from Earth center)

0.10261

15350144

Maximum Brightness

18.3

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

18.5

mag

Diameter

500 - 1200*

Taxonomic type

Rotation period (T)

12.63

Discovery Information

Discovery Date

2012-07-19

Observatory

OAM Observatory, La Sagra

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

0.828765

1-sigma variation

1.692E-9

Unit

Eccentricity (e)

Value

0.502928

1-sigma variation

6.736E-8

Unit

Inclination (i)

Value

42.2622

1-sigma variation

4.900E-6

Unit

Long. of Ascending Node (Ω)

Value

303.7239

1-sigma variation

8.901E-7

Unit

Arg. of Perihelion (ω)

Value

224.3618

1-sigma variation

1.201E-6

Unit

Mean Anomaly (M)

Value

254.92798

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.411956

1-sigma variation

Unit

Aphelion distance

Value

1.245574

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.049113

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.529018

1-sigma variation

Unit

MOID

Value

0.038426

1-sigma variation

Unit

Orbit Period

Value

275.5787

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.86340E-18	2.55990E-17	-3.31674E-16	-3.29348E-16	-6.38687E-17	-8.35578E-15
e	2.55990E-17	4.53697E-15	-9.48545E-14	-1.40556E-14	-7.66158E-14	-5.05945E-13
i	-3.31674E-16	-9.48545E-14	2.40133E-11	3.54001E-12	2.68782E-13	1.06322E-11
Ω	-3.29348E-16	-1.40556E-14	3.54001E-12	7.92278E-13	-2.62485E-14	2.62764E-12
ω	-6.38687E-17	-7.66158E-14	2.68782E-13	-2.62485E-14	1.44165E-12	7.69312E-12
M	-8.35578E-15	-5.05945E-13	1.06322E-11	2.62764E-12	7.69312E-12	6.85940E-11

Date of computation: 2026-03-17 23:26 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

12.63

Unit

Source

[1]

Quality

Value

Unit

Source

[-]

Amplitude

Value

0.63

Unit

mag

Source

[1]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

340

Unit

Source

[1]

Spinvector B

Value

Unit

Source

[1]

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

18.47

Unit

mag

Source

[2]

Slope Parameter (G)

Value

0.15**

Unit

Source

[2]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[3]

Diameter

Value

500 - 1200*

Unit

Source

[3]

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]	EARN	1.) Near-Earth Asteroid Lightcurve Analysis at the Center for Solar System Studies: 2018 July-September, B.D. Warner
[2]	ESA Aegis	ESA orbit determination and impact monitoring system
[3]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

4441

Unit

Source

[1]

Unobserved

Value

582

Unit

Source

[1]

Normalized RMS of residuals

Value

0.438604

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2012-07-19.1038

Unit

Source

[2]

Last Observation

Value

2024-09-15.165954

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

1489 (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

2024-07-26

Unit

Source

[3]

Last Observation

Value

2024-07-31

Unit

Source

[3]

Delay (Discarded)

Value

5 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

5 (0)

Unit

Source

[1]

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
[3]	JPL Radar Observations	Jet Propulsion Laboratory: https://ssd.jpl.nasa.gov/dat/radar_data_ast.txt

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 523664 2012OD1 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	1978-07-24 19:22	< 1 s	0.1688761	0.1688742	0.0000006
EARTH	1981-07-26 09:15	< 1 min	0.0792756	0.0792740	0.0000006
EARTH	1984-07-28 17:20	< 1 min	0.0449631	0.0449622	0.0000003
EARTH	1987-08-01 18:17	< 1 min	0.1278916	0.1278901	0.0000005
EARTH	2018-07-24 15:09	< 1 s	0.1963625	0.1963623	0.0000001
EARTH	2021-07-25 22:08	< 1 s	0.1040403	0.1040402	0.0000000
EARTH	2024-07-28 02:46	< 1 s	0.0382178	0.0382178	0.0000000
EARTH	2027-07-31 23:30	< 1 s	0.1026094	0.1026092	0.0000001
EARTH	2030-08-04 09:36	< 1 s	0.1980569	0.1980566	0.0000001
EARTH	2061-07-25 12:56	< 1 s	0.1297889	0.1297873	0.0000005
EARTH	2064-07-27 12:37	< 1 min	0.0477504	0.0477493	0.0000004
EARTH	2067-07-31 03:53	< 1 min	0.0766868	0.0766851	0.0000006
EARTH	2070-08-03 09:41	< 1 min	0.1684431	0.1684411	0.0000007
EARTH	2101-07-26 01:43	< 1 min	0.1677845	0.1677818	0.0000009
EARTH	2104-07-27 15:44	< 1 min	0.0785915	0.0785890	0.0000008
EARTH	2107-07-31 00:31	< 1 min	0.0466846	0.0466830	0.0000005
EARTH	2110-08-03 02:12	< 1 min	0.1296389	0.1296360	0.0000009

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
112.15482323	204.36723145	0.03909838	MINIMUM
317.77741844	4.51367019	0.50197689	MINIMUM
230.23024318	273.10315146	0.72910957	SADDLE
24.93126830	104.68847857	0.73640344	SADDLE
18.05182997	269.79876226	1.35828749	SADDLE
169.85364291	53.61203432	2.17827827	MAXIMUM

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MOID Plots

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