Asteroids

163364 2002OD20 help

Last update: 2025-07-29 02:36 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.861

Aphelion (Q)

1.869

Eccentricity (e)

0.369

Inclination (i)

4.2

deg

Orbit period (P)

582.6

Earth MOID

0.02626

U parameter

0.0

Next Earth close approach

Date

2029-03-18

Nominal distance (from Earth center)

0.14959

22377921

Maximum Brightness

23.2

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

18.9

mag

Diameter

400 - 1000*

Taxonomic type

Rotation period (T)

2.420

Discovery Information

Discovery Date

2002-07-21

Observatory

Palomar Mountain/NEAT

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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.365094

1-sigma variation

1.291E-9

Unit

Eccentricity (e)

Value

0.368951

1-sigma variation

1.532E-8

Unit

Inclination (i)

Value

4.1928

1-sigma variation

3.176E-6

Unit

Long. of Ascending Node (Ω)

Value

259.8450

1-sigma variation

2.316E-5

Unit

Arg. of Perihelion (ω)

Value

275.3451

1-sigma variation

2.357E-5

Unit

Mean Anomaly (M)

Value

207.68900

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.861441

1-sigma variation

Unit

Aphelion distance

Value

1.868747

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.125456

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.235945

1-sigma variation

Unit

MOID

Value

0.026260

1-sigma variation

Unit

Orbit Period

Value

582.5621

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.66747E-18	-4.91589E-18	2.24223E-16	2.07110E-15	7.43045E-16	-7.44982E-15
e	-4.91589E-18	2.34729E-16	1.79548E-15	7.63659E-14	-8.02866E-14	5.53844E-15
i	2.24223E-16	1.79548E-15	1.00897E-11	-2.79374E-11	2.68920E-11	1.17767E-12
Ω	2.07110E-15	7.63659E-14	-2.79374E-11	5.36378E-10	-5.38316E-10	1.10600E-11
ω	7.43045E-16	-8.02866E-14	2.68920E-11	-5.38316E-10	5.55762E-10	-3.16067E-11
M	-7.44982E-15	5.53844E-15	1.17767E-12	1.10600E-11	-3.16067E-11	4.17672E-11

Date of computation: 2025-07-29 02:36 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

2.420

Unit

Source

[4]

Quality

Value

Unit

Source

[4]

Amplitude

Value

0.11

Unit

mag

Source

[4]

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

[1]

[2]

Taxonomy (all)

Value

Unit

Source

[3]

[2]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

18.946

Unit

mag

Source

[5]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[5]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[6]

Diameter

Value

400 - 1000*

Unit

Source

[6]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

0.845

0.337

0.436

Unit

B-V

R-I

V-R

Source

[7]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Radar R

Visual S

Unit

Source

[8]

[2]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) Alexey V. Sergeyev and Benoit Carry A&A, 652 (2021) A59
[2]	EARN	1.) Hicks, M. et al. (2013) href="http://www.astronomerstelegram.org/?read=5132"> ATel#5132 (Palomar Spectroscopy of Near-Earth Asteroids 137199 (1999 KX4), 152756 (1999 JV3), 163249 (2002 GT), 163364 (2002 OD20), and 285263 (1998 QE2))
[3]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[4]	EARN	1.) Oey, J. (2014) MPB 41, 276-280. (LIGHTCURVE ANALYSIS OF ASTEROIDS FROM BLUE MOUNTAINS OBSERVATORY IN 2013) (99942, 163364,285263)
[5]	ESA Aegis	ESA orbit determination and impact monitoring system
[6]	Estimation	Estimated from absolute magnitude
[7]	EARN	1.) Lin, C-H. et al. (2018) P&SS 152, 116-135. (Photometric survey and taxonomic identifications of 92 near-Earth asteroids)
[8]	EARN	1.) href="http://echo.jpl.nasa.gov/asteroids/index.html">JPL's NEO Radar Detection Program Webpage

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

8029

Unit

Source

[1]

Unobserved

Value

639

Unit

Source

[1]

Normalized RMS of residuals

Value

0.517132

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2001-11-22.61196

Unit

Source

[2]

Last Observation

Value

2023-11-16.303323

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

656 (8)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

2013-05-19

Unit

Source

[3]

Last Observation

Value

2013-05-22

Unit

Source

[3]

Delay (Discarded)

Value

2 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

3 (0)

Unit

Source

[1]

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

Close Approaches for 163364 2002OD20 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	1962-05-29 03:08	< 1 min	0.1071502	0.1071456	0.0000015
EARTH	1970-05-09 16:42	< 1 min	0.0761127	0.0761089	0.0000013
EARTH	1978-03-10 20:38	< 1 min	0.1481621	0.1481618	0.0000001
EARTH	1986-01-16 21:25	< 1 min	0.0435369	0.0435366	0.0000001
EARTH	2013-05-23 13:58	< 1 s	0.0387697	0.0387697	0.0000000
EARTH	2021-05-03 07:23	< 1 min	0.0956104	0.0956101	0.0000001
EARTH	2029-03-18 18:39	< 1 min	0.1495872	0.1495871	0.0000000
EARTH	2037-01-31 15:58	< 1 min	0.0958785	0.0958781	0.0000002
EARTH	2045-01-12 16:51	< 1 min	0.0588219	0.0588214	0.0000001
EARTH	2072-05-26 21:16	< 1 s	0.0708338	0.0708334	0.0000001
EARTH	2080-05-11 12:39	< 1 min	0.0689434	0.0689432	0.0000001
EARTH	2088-03-25 20:48	< 1 min	0.1482998	0.1482998	0.0000000
EARTH	2096-02-05 14:21	< 1 min	0.1048648	0.1048642	0.0000002
EARTH	2104-01-14 02:27	< 1 min	0.0675921	0.0675912	0.0000003
EARTH	2123-06-06 10:25	< 1 s	0.1981729	0.1981727	0.0000001

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
46.41904613	136.92246610	0.02625967	MINIMUM
317.72340564	13.34618028	0.04324378	MINIMUM
1.91522531	74.74901285	0.14982470	SADDLE
181.11819984	254.21362821	0.87001328	SADDLE
2.60503893	255.75395662	1.86447387	SADDLE
181.23999541	74.29245977	2.86227679	MAXIMUM

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MOID Plots

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