Asteroids

2009SE2 help

Last update: 2025-05-05 08:31 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Amor

Perihelion (q)

1.278

Aphelion (Q)

3.931

Eccentricity (e)

0.509

Inclination (i)

6.4

deg

Orbit period (P)

1535.3

Earth MOID

0.27152

U parameter

9.0

Next Earth close approach

Date

Nominal distance (from Earth center)

Maximum Brightness

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

23.2

mag

Diameter

60 - 130*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2009-09-18

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

2.604539

1-sigma variation

0.110237

Unit

Eccentricity (e)

Value

0.509341

1-sigma variation

0.026022

Unit

Inclination (i)

Value

6.4450

1-sigma variation

0.1092

Unit

Long. of Ascending Node (Ω)

Value

171.5969

1-sigma variation

0.2257

Unit

Arg. of Perihelion (ω)

Value

155.9570

1-sigma variation

8.9734

Unit

Mean Anomaly (M)

Value

267.10244

1-sigma variation

83.46830

Unit

Perihelion distance

Value

1.277941

1-sigma variation

Unit

Aphelion distance

Value

3.931137

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

2.612692

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.310945

1-sigma variation

Unit

MOID

Value

0.271523

1-sigma variation

Unit

Orbit Period

Value

1535.3055

1-sigma variation

Unit

U parameter

Value

9.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.21523E-2	2.57498E-3	8.38372E-3	2.32139E-2	-6.08614E-1	-9.19735E0
e	2.57498E-3	6.77147E-4	8.77771E-4	5.85065E-3	-2.10090E-1	-1.92072E0
i	8.38372E-3	8.77771E-4	1.19278E-2	9.65006E-3	1.34437E-1	-6.53739E0
Ω	2.32139E-2	5.85065E-3	9.65006E-3	5.09464E-2	-1.73736E0	-1.73699E1
ω	-6.08614E-1	-2.10090E-1	1.34437E-1	-1.73736E0	8.05225E1	4.43271E2
M	-9.19735E0	-1.92072E0	-6.53739E0	-1.73699E1	4.43271E2	6.96696E3

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

23.244

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

60 - 130*

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

1.0

Unit

Source

[1]

Unobserved

Value

5707

Unit

Source

[1]

Normalized RMS of residuals

Value

0.446929

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2009-09-18.2892

Unit

Source

[2]

Last Observation

Value

2009-09-19.25274

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

19 (1)

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

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
0.73283281	227.27404375	0.27152254	MINIMUM
358.94349046	44.10885045	2.26563296	SADDLE
179.56690670	45.03734844	2.94411961	SADDLE
179.80599405	225.16881869	4.94168800	MAXIMUM

Download:

MOID Plots

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