Asteroids

207398 2006AS2 help

Last update: 2025-09-10 00:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.748

Aphelion (Q)

3.432

Eccentricity (e)

0.642

Inclination (i)

2.6

deg

Orbit period (P)

1103.8

Earth MOID

0.00966

U parameter

0.0

Next Earth close approach

Date

2027-07-11

Nominal distance (from Earth center)

0.18582

27798156

Maximum Brightness

19.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

20.4

mag

Diameter

220 - 500*

Taxonomic type

Rotation period (T)

4.480

Discovery Information

Discovery Date

2006-01-05

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

2.090202

1-sigma variation

5.812E-10

Unit

Eccentricity (e)

Value

0.641980

1-sigma variation

4.737E-9

Unit

Inclination (i)

Value

2.5964

1-sigma variation

2.746E-6

Unit

Long. of Ascending Node (Ω)

Value

125.6301

1-sigma variation

1.897E-5

Unit

Arg. of Perihelion (ω)

Value

80.0485

1-sigma variation

1.926E-5

Unit

Mean Anomaly (M)

Value

180.37702

1-sigma variation

8.559E-7

Unit

Perihelion distance

Value

0.748333

1-sigma variation

Unit

Aphelion distance

Value

3.432070

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.121571

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.364637

1-sigma variation

Unit

MOID

Value

0.009664

1-sigma variation

Unit

Orbit Period

Value

1103.7754

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.37794E-19	2.04551E-18	-3.83350E-16	-1.91188E-15	2.55115E-15	-4.16849E-16
e	2.04551E-18	2.24414E-17	-3.98948E-15	4.28367E-14	-3.89759E-14	-3.31524E-15
i	-3.83350E-16	-3.98948E-15	7.54206E-12	-3.91523E-12	5.45748E-12	1.72948E-13
Ω	-1.91188E-15	4.28367E-14	-3.91523E-12	3.59812E-10	-3.64341E-10	1.69679E-13
ω	2.55115E-15	-3.89759E-14	5.45748E-12	-3.64341E-10	3.70978E-10	-1.23002E-12
M	-4.16849E-16	-3.31524E-15	1.72948E-13	1.69679E-13	-1.23002E-12	7.32585E-13

Date of computation: 2025-09-10 00:30 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

4.480

Unit

Source

[2]

Quality

Value

Unit

Source

[2]

Amplitude

Value

0.2

Unit

mag

Source

[2]

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

[1]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

20.383

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

220 - 500*

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

Radar R

Unit

Source

[5]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) Somers, J.M. et al. (2010) DPS 42, 1316. (abstract) (Optical Characterization Of Planetary Radar Targets, Low-deltaV, And Potentially Hazardous Asteroids: Results From 2009-2010)
[2]	EARN	1.) Warner, B.D. (2009) MPB 36, 109-116. (ASTEROID LIGHTCURVE ANALYSIS AT THE PALMER DIVIDE OBSERVATORY: 2008 DECEMBER - 2009 MARCH) (..,207398)
[3]	ESA Aegis	ESA orbit determination and impact monitoring system
[4]	Estimation	Estimated from absolute magnitude
[5]	EARN	1.) href="http://echo.jpl.nasa.gov/asteroids/index.html">JPL's NEO Radar Detection Program Webpage

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

7632

Unit

Source

[1]

Unobserved

Value

467

Unit

Source

[1]

Normalized RMS of residuals

Value

0.477904

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2003-08-23.16993

Unit

Source

[2]

Last Observation

Value

2024-07-15.163018

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

525 (6)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

2009-02-07

Unit

Source

[3]

Last Observation

Value

2024-07-03

Unit

Source

[3]

Delay (Discarded)

Value

8 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

3 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

11 (0)

Unit

Source

[1]

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
[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 207398 2006AS2 from 1950 to 2125

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au
EARTH	2006-01-29 07:04	< 1 s	0.1607382	0.1607381
VENUS	2006-03-17 12:16	< 1 s	0.0443822	0.0443821
EARTH	2009-02-10 13:33	< 1 s	0.0235294	0.0235294
EARTH	2021-06-16 02:33	< 1 s	0.1076659	0.1076659
EARTH	2024-07-02 05:32	< 1 s	0.0558756	0.0558755
EARTH	2027-07-11 06:31	< 1 s	0.1858192	0.1858191
EARTH	2115-02-03 08:08	< 1 s	0.1401215	0.1401213
EARTH	2118-02-23 18:57	< 1 s	0.1076930	0.1076929
EARTH	2124-05-29 12:31	< 1 min	0.1856993	0.1856992

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
325.27679947	35.29225007	0.00974381	MINIMUM
36.93090042	174.52059834	0.02217158	MINIMUM
1.51980813	105.48981823	0.25835287	SADDLE
1.44463560	285.33828692	1.74387925	SADDLE
180.32424091	283.85883932	2.43758655	SADDLE
180.31231536	103.85534136	4.43511537	MAXIMUM

Download:

MOID Plots

Click on the images to zoom-in and zoom-out