Asteroids

2007EK help

Last update: 2026-07-30 11:21 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.820

Aphelion (Q)

1.433

Eccentricity (e)

0.272

Inclination (i)

1.2

deg

Orbit period (P)

436.5

Earth MOID

0.00140

U parameter

6.4

Next Earth close approach

Date

2026-08-30

Nominal distance (from Earth center)

0.03119

4666348

Maximum Brightness

24.6

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

29.1

mag

Diameter

4 - 9*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2007-03-09

Observatory

Steward Observatory, Kitt Peak-Spacewatch

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

1.126218

1-sigma variation

0.000024

Unit

Eccentricity (e)

Value

0.272319

1-sigma variation

0.000077

Unit

Inclination (i)

Value

1.2090

1-sigma variation

0.0009

Unit

Long. of Ascending Node (Ω)

Value

168.4831

1-sigma variation

0.0004

Unit

Arg. of Perihelion (ω)

Value

83.4975

1-sigma variation

0.0029

Unit

Mean Anomaly (M)

Value

345.14472

1-sigma variation

0.63150

Unit

Perihelion distance

Value

0.819527

1-sigma variation

Unit

Aphelion distance

Value

1.432908

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.018480

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.069051

1-sigma variation

Unit

MOID

Value

0.001402

1-sigma variation

Unit

Orbit Period

Value

436.5479

1-sigma variation

Unit

U parameter

Value

6.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	5.89297E-10	1.87756E-9	2.29056E-8	1.05766E-8	-7.12708E-8	-1.53300E-5
e	1.87756E-9	5.98265E-9	7.29750E-8	3.36943E-8	-2.26980E-7	-4.88429E-5
i	2.29056E-8	7.29750E-8	8.90585E-7	4.11583E-7	-2.77156E-6	-5.95869E-4
Ω	1.05766E-8	3.36943E-8	4.11583E-7	1.90926E-7	-1.28095E-6	-2.75142E-4
ω	-7.12708E-8	-2.26980E-7	-2.77156E-6	-1.28095E-6	8.63853E-6	1.85407E-3
M	-1.53300E-5	-4.88429E-5	-5.95869E-4	-2.75142E-4	1.85407E-3	3.98796E-1

Date of computation: 2026-07-30 11:21 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

29.091

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

4 - 9*

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

Unit

Source

[1]

Unobserved

Value

7084

Unit

Source

[1]

Normalized RMS of residuals

Value

0.586049

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2007-03-09.21547

Unit

Source

[2]

Last Observation

Value

2007-03-13.158892

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

38 (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 2007EK 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	1954-09-02 05:50	> 1 d	0.1982335	0.0097877	0.1602391
EARTH	1959-06-03 16:52	> 1 mo	0.1857316	0.1828091	0.0010376
EARTH	1964-03-01 16:18	> 1 d	0.1898968	0.0007881	0.0745867
EARTH	1970-08-22 03:10	336.0	0.0106714	0.0106470	0.0001756
EARTH	1975-04-22 15:33	1099.6	0.1492206	0.1474545	0.0005888
EARTH	1986-08-12 10:28	> 1 d	0.0804847	0.0483394	0.0107664
EARTH	1991-03-22 19:30	> 1 d	0.0779039	0.0442007	0.0112344
EARTH	2002-07-12 12:47	> 1 d	0.1505523	0.1444825	0.0020233
EARTH	2007-03-13 05:29	< 1 s	0.0017664	0.0017644	0.0000006
EARTH	2013-03-04 12:54	337.5	0.1493736	0.1327693	0.0055348
EARTH	2020-09-07 02:19	632.5	0.1766157	0.1446452	0.0106575
EARTH	2026-08-30 22:29	1155.2	0.0311926	0.0048290	0.0128064
EARTH	2032-08-25 21:57	> 1 d	0.0315315	0.0047935	0.0233808
EARTH	2038-07-24 22:57	> 1 d	0.1456890	0.1393033	0.0021286
EARTH	2044-06-17 21:29	> 1 w	0.1920807	0.1854849	0.0021988
EARTH	2050-05-18 16:52	> 1 w	0.1884118	0.1704241	0.0059978
EARTH	2056-04-10 01:18	> 1 w	0.1325385	0.0302076	0.0341918
EARTH	2062-03-14 07:50	> 1 d	0.0125087	0.0015527	0.0588656
EARTH	2068-03-23 18:46	> 1 mo	0.0879070	0.0002224	0.8951395
EARTH	2074-04-23 23:52	> 1 mo	0.1555222	0.0094987	0.8379446
EARTH	2080-05-19 00:56	> 1 mo	0.1871139	0.0201940	0.3959018
EARTH	2086-06-11 11:43	> 1 mo	0.1921688	0.0103039	0.1959372
EARTH	2092-07-04 24:00	> 1 mo	0.1726645	0.0038910	1.1287083
EARTH	2098-08-07 05:29	> 1 mo	0.1158660	0.0017414	2.8906078
EARTH	2104-08-24 16:23	> 1 mo	0.0399230	0.0050355	2.9236989
EARTH	2110-08-27 14:08	> 1 mo	0.0132505	0.0050961	1.8817021
EARTH	2116-07-26 13:37	> 1 mo	0.1410505	0.0026110	8.4624640
EARTH	2122-06-17 08:26	> 1 mo	0.1923268	0.0055714	3.4633580

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
295.57973017	67.10254143	0.00140220	MINIMUM
67.90621809	231.68263835	0.00487524	MINIMUM
2.13635131	149.80844272	0.19579284	SADDLE
181.21975772	328.84061255	0.44763031	SADDLE
2.05110588	329.71091259	1.80533100	SADDLE
181.23222134	148.85968999	2.44708769	MAXIMUM

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MOID Plots

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Level lines of the squared distance function

2007EK

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS	TS
2111-09-08.527	92336.527	1.162	0.000	0.98 ± 0.000	1.29E8	4.90E-9	3.41E-3	-10.69	0


Based on 38 optical observations (of which 0 are rejected as outliers) from 2007/03/09.215 to 2007/03/13.159.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.67 and 1.67 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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