Asteroids

2012KP24 help

Last update: 2026-06-04 23:11 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.945

Aphelion (Q)

2.056

Eccentricity (e)

0.370

Inclination (i)

18.5

deg

Orbit period (P)

671.2

Earth MOID

0.00023

U parameter

7.5

Next Earth close approach

Date

2034-06-18

Nominal distance (from Earth center)

0.17258

25818249

Maximum Brightness

25.9

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

26.4

mag

Diameter

14 - 30*

Taxonomic type

Rotation period (T)

0.04167

Discovery Information

Discovery Date

2012-05-23

Observatory

University of Arizona 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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.500325

1-sigma variation

0.000725

Unit

Eccentricity (e)

Value

0.370118

1-sigma variation

0.000236

Unit

Inclination (i)

Value

18.4520

1-sigma variation

0.0083

Unit

Long. of Ascending Node (Ω)

Value

67.4094

1-sigma variation

0.0013

Unit

Arg. of Perihelion (ω)

Value

221.4540

1-sigma variation

0.0439

Unit

Mean Anomaly (M)

Value

214.10294

1-sigma variation

0.03236

Unit

Perihelion distance

Value

0.945028

1-sigma variation

Unit

Aphelion distance

Value

2.055622

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.804978

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.000274

1-sigma variation

Unit

MOID

Value

0.000231

1-sigma variation

Unit

Orbit Period

Value

671.2378

1-sigma variation

Unit

U parameter

Value

7.5

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	5.25727E-7	1.70966E-7	-6.03312E-6	-9.15856E-7	-3.18507E-5	-2.34660E-5
e	1.70966E-7	5.55984E-8	-1.96189E-6	-2.97831E-7	-1.03575E-5	-7.63122E-6
i	-6.03312E-6	-1.96189E-6	6.92429E-5	1.05105E-5	3.65543E-4	2.69279E-4
Ω	-9.15856E-7	-2.97831E-7	1.05105E-5	1.59552E-6	5.54879E-5	4.08790E-5
ω	-3.18507E-5	-1.03575E-5	3.65543E-4	5.54879E-5	1.92977E-3	1.42162E-3
M	-2.34660E-5	-7.63122E-6	2.69279E-4	4.08790E-5	1.42162E-3	1.04743E-3

Date of computation: 2026-06-04 23:11 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

0.04167

Unit

Source

[2]

Quality

Value

Unit

Source

[2]

Amplitude

Value

0.86

Unit

mag

Source

[2]

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

26.361

Unit

mag

Source

[3]

Slope Parameter (G)

Value

0.15**

Unit

Source

[3]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[4]

Diameter

Value

14 - 30*

Unit

Source

[4]

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]	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]	EARN	1.) Warner, B.D. et al. (2012) MPB 39, 238-239. (LIGHTCURVE FOR NEA 2012 KP24) 2.) Polishook, D. et al. (2012) Icarus 221, 1187-1189. (SPECTRAL AND SPIN MEASUREMENT OF TWO SMALL AND FAST-ROTATING NEAR-EARTH ASTEROIDS) (2012KP24,2012KT42)
[3]	ESA Aegis	ESA orbit determination and impact monitoring system
[4]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

Unit

Source

[1]

Unobserved

Value

5144

Unit

Source

[1]

Normalized RMS of residuals

Value

0.388166

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2012-05-23.33535

Unit

Source

[2]

Last Observation

Value

2012-05-28.43334

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

139 (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

Filters

Initial Date: *

Final Date: *

Normalised Only accepted

Max residual (arcsec):

* - these fields are required

Plot

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 2012KP24 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	1952-05-21 05:32	> 1 d	0.1074064	0.0064989	0.0416761
EARTH	1999-06-07 21:46	> 1 d	0.1089863	0.0633692	0.0152644
EARTH	2012-05-28 15:20	< 1 s	0.0003829	0.0003827	0.0000001
EARTH	2023-05-31 19:10	> 1 d	0.0275945	0.0004131	0.0112270
EARTH	2034-06-18 00:31	> 1 d	0.1725843	0.0749028	0.0342112
EARTH	2080-05-21 02:55	> 1 w	0.1008400	0.0048898	0.1833936
EARTH	2091-06-01 22:25	> 1 w	0.0393685	0.0003537	0.1147409

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
331.13414484	145.40314454	0.00158923	MINIMUM
186.46738867	10.31660369	1.11645665	SADDLE
3.32404106	11.12294916	1.91669532	SADDLE
177.49517987	184.31499693	3.05902387	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2012KP24

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS	TS
2032-05-28.587	63380.587	-2.772	0.000	0.97 ± 0.001	7.14E4	3.07E-7	2.45E-1	-6.35	0


Based on 139 optical observations (of which 0 are rejected as outliers) from 2012/05/23.335 to 2012/05/28.433.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.33 and 1.33 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
AstOD software version= 4.0, Date of computation=20250805 130500.123 UTC.

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Download Impactor Table as: