Asteroids

2007KE4

Last update: 2023-03-30 21:00 UTC

Orbital Properties

Epoch

60000.0

MJD

Orbit type

Apollo

Perihelion (q)

1.008

Aphelion (Q)

3.759

Eccentricity (e)

0.577

Inclination (i)

9.3

deg

Orbit period (P)

1344.0

Earth MOID

0.00689

U parameter

8.9

Next Earth close approach

Date

2099-05-02

Nominal distance (from Earth center)

0.17742

26541103

Maximum Brightness

mag

Risk

Object is in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

25.2

mag

Diameter

30*

Taxonomic type

Rotation period (T)

0.02141

Discovery Information

Discovery Date

2007-05-24

Observatory

Catalina Sky Survey

Orbit Visualiser

Click the button to start Orbit Visualiser

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion
Aphelion
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period
U parameter

Value

1-sigma variation

Unit

Epoch

Value

60000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

2.383446

1-sigma variation

0.009922

Unit

Eccentricity (e)

Value

0.577167

1-sigma variation

0.001266

Unit

Inclination (i)

Value

9.3041

1-sigma variation

0.0076

Unit

Ascending Node (Ω)

Value

64.7398

1-sigma variation

0.0183

Unit

Arg. of Perihelion (ω)

Value

195.4455

1-sigma variation

0.0769

Unit

Mean Anomaly (M)

Value

93.93121

1-sigma variation

10.00860

Unit

Perihelion

Value

1.007799

1-sigma variation

Unit

Aphelion

Value

3.759093

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

2.594771

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.008229

1-sigma variation

Unit

MOID

Value

0.006885

1-sigma variation

Unit

Orbit Period

Value

1344.0218

1-sigma variation

Unit

U parameter

Value

8.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	9.84482E-5	1.25638E-5	7.56239E-5	-1.82017E-4	7.62639E-4	-9.93062E-2
e	1.25638E-5	1.60338E-6	9.65103E-6	-2.32288E-5	9.73322E-5	-1.26733E-2
i	7.56239E-5	9.65103E-6	5.80986E-5	-1.39819E-4	5.85848E-4	-7.62830E-2
Ω	-1.82017E-4	-2.32288E-5	-1.39819E-4	3.36525E-4	-1.41004E-3	1.83604E-1
ω	7.62639E-4	9.73322E-5	5.85848E-4	-1.41004E-3	5.91199E-3	-7.69287E-1
M	-9.93062E-2	-1.26733E-2	-7.62830E-2	1.83604E-1	-7.69287E-1	1.00172E2

Date of computation: 2022-11-23 04:56 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

0.02141

Unit

Source

[1]

Quality

Value

Unit

Source

[1]

Amplitude

Value

0.4

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

[-]

Taxonomy (all)

Value

Unit

Source

[-]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

25.202

Unit

mag

Source

[2]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[3]

[2]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

Unit

Source

[-]

Diameter

Value

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.) Kwiatkowski, T. et al. (2010) Astron. Astrophys. 509, A94. (Photometric survey of the very small near-Earth asteroids with the SALT telescope I. Lightcurves and periods for 14 objects) (K06XY,K06YH14,K07DD,K07DX,K07HD84,K07KE,K07KE4, K07LT,K07LW19,K07RS146,K07TU18,K07VV83,K07XO3,K08DG4)
[2]	ESA ODIM	ESA orbit determination and impact monitoring system
[3]	NEODyS	NEO Dynamic Site: https://newton.spacedys.com/neodys2
[4]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved

Arc Information

Value

Unit

Source

Arc Length

Value

Unit

Source

[1]

Unobserved

Value

5788

Unit

Source

[1]

Astrometry Summary

RMS of Residuals
First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

RMS of Residuals

Value

0.345091

Unit

arcsec

Source

[1]

First Observation

Value

2007-05-24.32711

Unit

Source

[2]

Last Observation

Value

2007-05-25.93615

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

31 (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

[3]

Last Observation

Value

Unit

Source

[3]

Delay (Discarded)

Value

0 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[1]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA ODIM	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 2007KE4 from 1950 to 2123

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possibile distance in au	Distance uncert. in au
EARTH	2007-05-27 23:08	< 1 min	0.0181299	0.0179857	0.0000481
EARTH	2099-05-02 19:12	> 1 mo	0.1774163	0.0216674	1.6778703
EARTH	2110-06-02 16:19	> 1 mo	0.0243206	0.0193653	0.2956995

Download as:

2007KE4

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS
2026-05-25.987	61185.987	4.271	1.46 ± 0.080	8.23E3	2.72E-9	3.24E-9	-7.58
2029-05-26.013	62282.013	-0.965	0.98 ± 0.035	1.74E4	4.27E-5	4.50E-5	-3.67
2091-05-26.021	84927.021	-0.822	0.21 ± 0.004	8.58E5	9.78E-7	1.04E-6	-6.30
2115-05-26.632	93692.632	1.826	0.71 ± 0.000	4.37E6	4.79E-8	5.42E-8	-7.72


Based on 33 optical observations (of which 0 are rejected as outliers) from 2007/05/24.327 to 2007/05/26.387.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.48 and 1.48 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
AstOD software version= 4.0, Date of computation=20220814 124216.222 UTC.

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Download Impactor Table as: