Asteroids

465617 2009EK1 help

Last update: 2024-05-05 23:50 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.957

Aphelion (Q)

1.525

Eccentricity (e)

0.229

Inclination (i)

9.1

deg

Orbit period (P)

504.9

Earth MOID

0.03166

U parameter

0.4

A₂

-112.9

10^-15au/days²

Next Earth close approach

Date

2048-10-21

Nominal distance (from Earth center)

0.09976

14924114

Maximum Brightness

20.4

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

21.4

mag

Diameter

140 - 300*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2009-03-02

Observatory

Mt. Lemmon 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)
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

60400.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.240847

1-sigma variation

1.083E-8

Unit

Eccentricity (e)

Value

0.229114

1-sigma variation

8.620E-8

Unit

Inclination (i)

Value

9.1249

1-sigma variation

6.432E-6

Unit

Long. of Ascending Node (Ω)

Value

358.3850

1-sigma variation

3.646E-5

Unit

Arg. of Perihelion (ω)

Value

21.8665

1-sigma variation

4.175E-5

Unit

Mean Anomaly (M)

Value

87.39529

1-sigma variation

0.00002

Unit

Perihelion distance

Value

0.956551

1-sigma variation

Unit

Aphelion distance

Value

1.525142

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.033795

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.497781

1-sigma variation

Unit

MOID

Value

0.031662

1-sigma variation

Unit

Orbit Period

Value

504.8655

1-sigma variation

Unit

U parameter

Value

0.4

1-sigma variation

Unit

A₂

Value

-112.92028

1-sigma variation

20.22830

Unit

10^-15au/days²

Covariance Matrix

	a	e	i	Ω	ω	M	A₂
a	1.17349E-16	-1.67440E-16	1.82965E-16	7.11676E-14	-1.18973E-13	-6.39689E-14	2.06507E-7
e	-1.67440E-16	7.43096E-15	-1.10951E-13	-4.28731E-13	9.40527E-13	-1.08094E-12	-6.81107E-8
i	1.82965E-16	-1.10951E-13	4.13749E-11	-5.59222E-11	6.42694E-12	6.50137E-11	-2.02745E-5
Ω	7.11676E-14	-4.28731E-13	-5.59222E-11	1.32913E-9	-1.37257E-9	2.60683E-11	1.79510E-5
ω	-1.18973E-13	9.40527E-13	6.42694E-12	-1.37257E-9	1.74301E-9	-3.77497E-10	-1.83443E-5
M	-6.39689E-14	-1.08094E-12	6.50137E-11	2.60683E-11	-3.77497E-10	5.81449E-10	-2.27192E-4
A₂	2.06507E-7	-6.81107E-8	-2.02745E-5	1.79510E-5	-1.83443E-5	-2.27192E-4	4.09184E2

Date of computation: 2024-04-23 10:08 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

[1]

Taxonomy (all)

Value

Unit

Source

[2]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

21.378

Unit

mag

Source

[3]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[3]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[4]

Diameter

Value

140 - 300*

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

[-]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) Alexey V. Sergeyev and Benoit Carry A&A, 652 (2021) A59
[2]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[3]	ESA ODIM	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

7813

Unit

Source

[1]

Unobserved

Value

362

Unit

Source

[1]

Normalized RMS of residuals

Value

0.53181

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2001-12-18.36022

Unit

Source

[2]

Last Observation

Value

2023-05-10.341778

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

88 (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 465617 2009EK1 from 1950 to 2124

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possibile distance in au	Distance uncert. in au
EARTH	1958-11-06 08:22	269.4	0.1350951	0.1330214	0.0006973
EARTH	1965-08-18 07:17	93.9	0.1834497	0.1807838	0.0008895
EARTH	1983-09-10 17:26	92.8	0.0415766	0.0410573	0.0001754
EARTH	2001-09-15 01:41	9.6	0.0328425	0.0328286	0.0000047
EARTH	2019-09-06 05:14	< 1 min	0.0571790	0.0571751	0.0000013
EARTH	2048-10-21 02:49	49.0	0.0997615	0.0995075	0.0000848
EARTH	2066-09-25 01:44	112.4	0.0414461	0.0410178	0.0001446
EARTH	2084-09-25 21:40	310.4	0.0441283	0.0428773	0.0004284
EARTH	2102-10-29 14:35	537.6	0.1151217	0.1120319	0.0010461

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