Asteroids

2009EY help

Last update: 2025-03-29 00:36 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.879

Aphelion (Q)

2.798

Eccentricity (e)

0.522

Inclination (i)

1.3

deg

Orbit period (P)

910.5

Earth MOID

0.01099

U parameter

9.0

Next Earth close approach

Date

2028-11-14

Nominal distance (from Earth center)

0.05084

7605396

Maximum Brightness

22.8

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

26.7

mag

Diameter

12 - 27*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2009-03-02

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

1.838511

1-sigma variation

0.010548

Unit

Eccentricity (e)

Value

0.522133

1-sigma variation

0.001892

Unit

Inclination (i)

Value

1.3081

1-sigma variation

0.1293

Unit

Long. of Ascending Node (Ω)

Value

2.0055

1-sigma variation

7.7398

Unit

Arg. of Perihelion (ω)

Value

103.2610

1-sigma variation

7.2475

Unit

Mean Anomaly (M)

Value

195.30449

1-sigma variation

11.98080

Unit

Perihelion distance

Value

0.878564

1-sigma variation

Unit

Aphelion distance

Value

2.798458

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.516162

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.197732

1-sigma variation

Unit

MOID

Value

0.010995

1-sigma variation

Unit

Orbit Period

Value

910.5375

1-sigma variation

Unit

U parameter

Value

9.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.11270E-4	1.95821E-5	-1.35921E-3	-8.16256E-2	7.63963E-2	1.26376E-1
e	1.95821E-5	3.58098E-6	-2.43312E-4	-1.43059E-2	1.33453E-2	2.22699E-2
i	-1.35921E-3	-2.43312E-4	1.67287E-2	9.95290E-1	-9.30184E-1	-1.54464E0
Ω	-8.16256E-2	-1.43059E-2	9.95290E-1	5.99049E1	-5.60865E1	-9.26942E1
ω	7.63963E-2	1.33453E-2	-9.30184E-1	-5.60865E1	5.25258E1	8.67462E1
M	1.26376E-1	2.22699E-2	-1.54464E0	-9.26942E1	8.67462E1	1.43539E2

Date of computation: 2025-03-29 00:36 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

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

26.74

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

12 - 27*

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

[-]

Download this part as:

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

0.9

Unit

Source

[1]

Unobserved

Value

5912

Unit

Source

[1]

Normalized RMS of residuals

Value

0.304974

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2009-03-02.30255

Unit

Source

[2]

Last Observation

Value

2009-03-03.23734

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

19 (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

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 2009EY 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	1951-12-13 13:36	> 1 mo	0.0868619	0.0171771	0.5752702
EARTH	1956-11-10 07:50	> 1 mo	0.0808578	0.0169215	2.0007446
EARTH	2009-02-24 06:17	21.0	0.0213665	0.0209246	0.0001473
EARTH	2014-01-31 10:25	> 1 mo	0.0827163	0.0083189	0.1202400
MARS	2014-05-08 17:06	> 1 w	0.0368588	0.0322737	0.0814899
EARTH	2018-12-25 17:09	> 1 mo	0.1018137	0.0227198	0.0976168
EARTH	2023-11-26 22:48	> 1 mo	0.0398230	0.0178472	0.4223554
EARTH	2028-11-14 07:01	> 1 mo	0.0508389	0.0178910	0.2844209
EARTH	2033-11-03 17:26	> 1 w	0.1896323	0.0176540	0.2343407
EARTH	2106-03-06 23:58	> 1 mo	0.1108567	0.0097074	5.8266378
EARTH	2111-02-23 05:56	> 1 mo	0.0113849	0.0101642	1.6113072
EARTH	2116-01-10 21:55	> 1 mo	0.1067998	0.0422266	2.6443653
EARTH	2120-11-22 15:21	> 1 mo	0.0210740	0.0196197	21.4733070
EARTH	2125-11-05 05:04	> 1 mo	0.1914785	0.0192901	579.5331642

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
27.91322331	50.15522918	0.01099496	MINIMUM
332.25949911	316.11135880	0.01871332	MINIMUM
359.98618557	2.95578257	0.10712581	SADDLE
180.02343926	183.06579832	1.78256993	SADDLE
0.09087719	183.13742790	1.89473149	SADDLE
180.03163183	3.06982873	3.78194239	MAXIMUM

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MOID Plots

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