Asteroids

2012KT42 help

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

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.712

Aphelion (Q)

2.484

Eccentricity (e)

0.555

Inclination (i)

2.2

deg

Orbit period (P)

737.7

Earth MOID

0.00086

U parameter

6.0

Next Earth close approach

Date

2028-10-27

Nominal distance (from Earth center)

0.13692

20482351

Maximum Brightness

28.3

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

28.9

mag

Diameter

4 - 10*

Taxonomic type

Rotation period (T)

0.06057

Discovery Information

Discovery Date

2012-05-28

Observatory

Mt. Lemmon 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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.597729

1-sigma variation

0.000057

Unit

Eccentricity (e)

Value

0.554611

1-sigma variation

0.000033

Unit

Inclination (i)

Value

2.1930

1-sigma variation

0.0003

Unit

Long. of Ascending Node (Ω)

Value

69.4685

1-sigma variation

2.937E-5

Unit

Arg. of Perihelion (ω)

Value

259.1171

1-sigma variation

0.0023

Unit

Mean Anomaly (M)

Value

120.73910

1-sigma variation

0.13473

Unit

Perihelion distance

Value

0.711611

1-sigma variation

Unit

Aphelion distance

Value

2.483847

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.248158

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.011317

1-sigma variation

Unit

MOID

Value

0.000858

1-sigma variation

Unit

Orbit Period

Value

737.6547

1-sigma variation

Unit

U parameter

Value

6.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.24873E-9	1.88273E-9	-1.66464E-8	9.79916E-10	1.30028E-7	-7.67931E-6
e	1.88273E-9	1.09446E-9	-9.76189E-9	5.98594E-10	7.59860E-8	-4.45040E-6
i	-1.66464E-8	-9.76189E-9	9.00577E-8	-5.58101E-9	-6.88302E-7	3.93495E-5
Ω	9.79916E-10	5.98594E-10	-5.58101E-9	8.62885E-10	4.47103E-8	-2.31653E-6
ω	1.30028E-7	7.59860E-8	-6.88302E-7	4.47103E-8	5.32309E-6	-3.07363E-4
M	-7.67931E-6	-4.45040E-6	3.93495E-5	-2.31653E-6	-3.07363E-4	1.81523E-2

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

0.06057

Unit

Source

[1]

Quality

Value

Unit

Source

[1]

Amplitude

Value

1.0

Unit

mag

Source

[1]

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]

Taxonomy (all)

Value

Unit

Source

[1]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

28.912

Unit

mag

Source

[2]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[2]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[3]

Diameter

Value

4 - 10*

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.) Polishook, D. et al. (2012) Icarus 221, 1187-1189. (SPECTRAL AND SPIN MEASUREMENT OF TWO SMALL AND FAST-ROTATING NEAR-EARTH ASTEROIDS) (2012KP24,2012KT42)
[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

1.0

Unit

Source

[1]

Unobserved

Value

4823

Unit

Source

[1]

Normalized RMS of residuals

Value

0.417182

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2012-05-28.29728

Unit

Source

[2]

Last Observation

Value

2012-05-29.26174

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

80 (7)

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 2012KT42 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	1954-12-03 12:49	> 1 d	0.0050423	0.0000769	0.0196975
VENUS	1972-01-19 19:00	126.5	0.0398426	0.0391198	0.0002469
EARTH	1973-05-28 01:06	119.0	0.0216730	0.0174998	0.0013911
EARTH	1979-12-11 03:30	292.5	0.1294017	0.1159650	0.0044789
EARTH	2004-11-28 18:30	374.8	0.0874048	0.0757379	0.0038890
EARTH	2012-05-29 07:06	< 1 s	0.0001391	0.0001391	0.0000000
VENUS	2012-07-08 11:17	8.4	0.0099111	0.0099097	0.0000004
EARTH	2014-06-08 06:32	123.0	0.1107259	0.1083987	0.0007758
EARTH	2028-10-27 04:04	908.6	0.1369161	0.1232154	0.0045692
EARTH	2030-11-07 01:02	501.1	0.0360676	0.0240984	0.0042091
EARTH	2032-11-12 12:26	244.0	0.0598185	0.0516787	0.0027271
EARTH	2034-11-18 19:57	37.6	0.1648752	0.1636388	0.0004121
VENUS	2063-01-09 05:31	> 1 d	0.0188358	0.0159375	0.0023846
VENUS	2099-05-07 00:30	> 1 d	0.0218242	0.0156716	0.0088928
VENUS	2113-07-03 09:46	> 1 d	0.0321410	0.0157999	0.0219155
EARTH	2119-05-27 11:53	259.5	0.0737654	0.0674488	0.0021130
EARTH	2121-06-06 03:25	> 1 d	0.0721220	0.0377147	0.0114744
MARS	2125-04-13 03:00	> 1 d	0.0442563	0.0212125	0.0180678

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
311.26077364	145.34092144	0.00085814	MINIMUM
46.83405096	305.08956676	0.01475793	MINIMUM
358.68201264	224.81347480	0.30141108	SADDLE
179.61487518	45.86536438	1.49642688	SADDLE
358.64331984	44.71809920	1.69978550	SADDLE
179.58280825	225.84213876	3.49457115	MAXIMUM

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MOID Plots

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