Asteroids

2012PB20 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.950

Aphelion (Q)

1.135

Eccentricity (e)

0.088

Inclination (i)

5.9

deg

Orbit period (P)

388.7

Earth MOID

0.00304

U parameter

0.3

Next Earth close approach

Date

2041-01-30

Nominal distance (from Earth center)

0.18163

27172140

Maximum Brightness

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

24.8

mag

Diameter

29 - 60*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2012-08-14

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

1.042395

1-sigma variation

6.102E-9

Unit

Eccentricity (e)

Value

0.088484

1-sigma variation

5.130E-8

Unit

Inclination (i)

Value

5.9242

1-sigma variation

3.369E-6

Unit

Long. of Ascending Node (Ω)

Value

142.4995

1-sigma variation

4.955E-6

Unit

Arg. of Perihelion (ω)

Value

54.6222

1-sigma variation

2.510E-5

Unit

Mean Anomaly (M)

Value

215.57620

1-sigma variation

0.00002

Unit

Perihelion distance

Value

0.950160

1-sigma variation

Unit

Aphelion distance

Value

1.134630

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.003845

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.076305

1-sigma variation

Unit

MOID

Value

0.003039

1-sigma variation

Unit

Orbit Period

Value

388.7290

1-sigma variation

Unit

U parameter

Value

0.3

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.72351E-17	2.61878E-16	1.71904E-14	1.66477E-14	8.75156E-14	-8.53376E-14
e	2.61878E-16	2.63185E-15	1.34129E-13	6.23181E-14	1.13620E-12	-9.49011E-13
i	1.71904E-14	1.34129E-13	1.13498E-11	6.38127E-13	6.24416E-11	-5.15389E-11
Ω	1.66477E-14	6.23181E-14	6.38127E-13	2.45503E-11	-1.78657E-11	-7.39333E-12
ω	8.75156E-14	1.13620E-12	6.24416E-11	-1.78657E-11	6.30007E-10	-4.83552E-10
M	-8.53376E-14	-9.49011E-13	-5.15389E-11	-7.39333E-12	-4.83552E-10	3.90663E-10

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

24.809

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

29 - 60*

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

4567

Unit

Source

[1]

Unobserved

Value

303

Unit

Source

[1]

Normalized RMS of residuals

Value

0.610356

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2012-08-10.51478

Unit

Source

[2]

Last Observation

Value

2025-02-09.131742

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

85 (0)

Unit

Source

[1]

Radar Summary

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

Radar

Value

Unit

Source

First Observation

Value

2025-02-10

Unit

Source

[3]

Last Observation

Value

2025-02-10

Unit

Source

[3]

Delay (Discarded)

Value

2 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

1 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

3 (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 2012PB20 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	1965-02-09 03:23	44.2	0.0243947	0.0232863	0.0003697
EARTH	1965-10-21 01:22	489.2	0.1631653	0.1630291	0.0000455
EARTH	1966-07-27 16:42	10.6	0.0531403	0.0523816	0.0002555
EARTH	1985-02-11 16:00	< 1 min	0.0026066	0.0026059	0.0000002
EARTH	1985-08-28 07:12	< 1 min	0.1335428	0.1335420	0.0000003
EARTH	1998-11-09 06:58	< 1 min	0.1793388	0.1793386	0.0000001
EARTH	1999-07-10 21:48	< 1 min	0.0894200	0.0894193	0.0000002
EARTH	2012-02-27 04:18	< 1 min	0.0653859	0.0653851	0.0000003
EARTH	2012-08-08 15:00	< 1 min	0.1041129	0.1041128	0.0000000
EARTH	2025-02-09 21:37	< 1 s	0.0089243	0.0089243	0.0000000
EARTH	2025-09-13 18:41	< 1 min	0.1422168	0.1422164	0.0000001
EARTH	2041-01-30 02:42	< 1 min	0.1816345	0.1816318	0.0000009
EARTH	2041-11-08 05:57	1.3	0.1703002	0.1702997	0.0000001
EARTH	2042-07-19 23:08	< 1 min	0.0645023	0.0645012	0.0000003
EARTH	2057-12-05 09:32	2.5	0.1588989	0.1588971	0.0000006
EARTH	2058-07-26 02:02	< 1 min	0.0587996	0.0587987	0.0000003
EARTH	2073-12-22 02:58	6.4	0.1483536	0.1483458	0.0000026
EARTH	2074-07-29 19:07	1.7	0.0657127	0.0657073	0.0000018
EARTH	2090-08-01 07:13	4.3	0.0714884	0.0714749	0.0000045
EARTH	2106-04-16 07:26	15.2	0.1107614	0.1107468	0.0000048
EARTH	2106-08-03 06:41	6.0	0.0744516	0.0744331	0.0000062
EARTH	2122-04-28 09:49	14.3	0.1121987	0.1121931	0.0000019
EARTH	2122-08-01 10:10	4.1	0.0718220	0.0718087	0.0000044

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
308.40211294	39.49623694	0.00303934	MINIMUM
98.67508466	199.90417725	0.05566707	MINIMUM
27.53076681	124.90638909	0.11307604	SADDLE
201.44428894	296.18751413	0.17122101	SADDLE
12.43180951	288.29985198	1.94522854	SADDLE
188.31020954	104.15442735	2.13625848	MAXIMUM

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MOID Plots

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