Asteroids

2012TP231 help

Last update: 2025-09-10 00:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.835

Aphelion (Q)

1.404

Eccentricity (e)

0.254

Inclination (i)

6.8

deg

Orbit period (P)

432.8

Earth MOID

0.00491

U parameter

2.1

Next Earth close approach

Date

2025-10-25

Nominal distance (from Earth center)

0.03893

5823234

Maximum Brightness

21.5

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

27 - 60*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2012-10-13

Observatory

Siding Spring 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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.119827

1-sigma variation

9.911E-8

Unit

Eccentricity (e)

Value

0.254008

1-sigma variation

4.590E-7

Unit

Inclination (i)

Value

6.7545

1-sigma variation

3.184E-5

Unit

Long. of Ascending Node (Ω)

Value

30.1132

1-sigma variation

2.705E-5

Unit

Arg. of Perihelion (ω)

Value

75.4367

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

332.93721

1-sigma variation

0.00022

Unit

Perihelion distance

Value

0.835383

1-sigma variation

Unit

Aphelion distance

Value

1.404272

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.010262

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.112807

1-sigma variation

Unit

MOID

Value

0.004915

1-sigma variation

Unit

Orbit Period

Value

432.8376

1-sigma variation

Unit

U parameter

Value

2.1

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	9.82268E-15	-4.54789E-14	-1.00928E-12	1.60267E-13	-1.01022E-11	2.17858E-11
e	-4.54789E-14	2.10725E-13	4.81022E-12	-8.14926E-13	4.69009E-11	-1.00864E-10
i	-1.00928E-12	4.81022E-12	1.01404E-9	-6.61439E-10	1.87139E-9	-2.21219E-9
Ω	1.60267E-13	-8.14926E-13	-6.61439E-10	7.31889E-10	-9.06044E-10	2.53587E-10
ω	-1.01022E-11	4.69009E-11	1.87139E-9	-9.06044E-10	1.12867E-8	-2.23771E-8
M	2.17858E-11	-1.00864E-10	-2.21219E-9	2.53587E-10	-2.23771E-8	4.83826E-8

Date of computation: 2025-09-10 00:30 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

24.974

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

27 - 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

[-]

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

2748

Unit

Source

[1]

Unobserved

Value

1973

Unit

Source

[1]

Normalized RMS of residuals

Value

0.464198

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2012-10-13.59025

Unit

Source

[2]

Last Observation

Value

2020-04-22.19265

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

43 (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

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

Close Approaches for 2012TP231 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	1951-10-15 20:45	7.3	0.0882512	0.0879862	0.0000883
EARTH	1958-11-03 11:00	44.6	0.0941739	0.0937761	0.0001326
EARTH	1966-01-11 17:18	127.8	0.1846894	0.1846855	0.0000013
EARTH	1973-03-29 16:12	6.9	0.0771571	0.0768193	0.0001127
EARTH	1980-04-06 08:14	6.5	0.1265836	0.1262981	0.0000952
EARTH	1985-10-10 08:40	3.6	0.1816569	0.1814834	0.0000578
EARTH	1992-10-22 06:48	< 1 min	0.0161159	0.0160947	0.0000071
EARTH	2000-02-08 08:35	5.6	0.1697459	0.1697374	0.0000028
EARTH	2000-04-12 15:11	3.2	0.1851189	0.1851007	0.0000061
EARTH	2007-04-09 00:38	< 1 min	0.1876079	0.1875950	0.0000043
EARTH	2012-10-22 05:10	< 1 min	0.0148668	0.0148666	0.0000001
EARTH	2020-03-31 00:46	< 1 min	0.0510527	0.0510521	0.0000002
EARTH	2025-10-25 02:43	< 1 min	0.0389259	0.0389145	0.0000038
EARTH	2033-04-06 07:47	< 1 min	0.1717509	0.1717381	0.0000043
EARTH	2038-12-27 12:19	6.2	0.1764336	0.1764309	0.0000009
EARTH	2052-03-26 08:59	< 1 min	0.0997037	0.0996593	0.0000148
EARTH	2057-10-20 00:37	1.5	0.0214532	0.0214090	0.0000147
EARTH	2065-03-27 15:39	3.3	0.0939470	0.0936822	0.0000883
EARTH	2070-10-11 13:22	11.2	0.1671993	0.1666680	0.0001771
EARTH	2078-01-11 10:27	211.5	0.1828144	0.1828118	0.0000009
EARTH	2090-11-10 22:02	124.9	0.1133192	0.1126118	0.0002359
EARTH	2098-04-02 11:48	12.4	0.0679102	0.0674560	0.0001518
EARTH	2103-10-24 05:06	9.4	0.0118353	0.0115903	0.0000818
EARTH	2117-03-26 22:30	99.3	0.1317265	0.1225758	0.0030660
EARTH	2122-10-26 08:09	631.6	0.0365926	0.0239631	0.0042247

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
296.25663679	286.76796877	0.00474817	MINIMUM
69.23788965	86.42344330	0.04604298	MINIMUM
4.00586095	8.53627113	0.18199902	SADDLE
181.92937135	185.03627324	0.40939122	SADDLE
0.70804471	184.31528784	1.84812117	SADDLE
179.84481167	3.39712760	2.38202124	MAXIMUM

Download:

MOID Plots

Click on the images to zoom-in and zoom-out