Asteroids

452561 2005AB help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Amor

Perihelion (q)

1.110

Aphelion (Q)

5.327

Eccentricity (e)

0.655

Inclination (i)

8.2

deg

Orbit period (P)

2109.0

Earth MOID

0.17021

U parameter

0.0

Next Earth close approach

Date

Nominal distance (from Earth center)

Maximum Brightness

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

17.5

mag

Diameter

2118

Taxonomic type

Rotation period (T)

3.339

Discovery Information

Discovery Date

2005-01-01

Observatory

Catalina Sky 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

3.218496

1-sigma variation

3.427E-8

Unit

Eccentricity (e)

Value

0.655009

1-sigma variation

1.177E-8

Unit

Inclination (i)

Value

8.1525

1-sigma variation

3.101E-6

Unit

Long. of Ascending Node (Ω)

Value

126.2224

1-sigma variation

2.039E-5

Unit

Arg. of Perihelion (ω)

Value

63.6881

1-sigma variation

2.491E-5

Unit

Mean Anomaly (M)

Value

207.26428

1-sigma variation

0.00002

Unit

Perihelion distance

Value

1.110353

1-sigma variation

Unit

Aphelion distance

Value

5.326639

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.439238

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

1.572367

1-sigma variation

Unit

MOID

Value

0.170210

1-sigma variation

Unit

Orbit Period

Value

2109.0065

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.17429E-15	1.24823E-16	-9.23803E-15	-1.34530E-13	3.33555E-13	-7.39839E-13
e	1.24823E-16	1.38490E-16	-1.40685E-14	-3.85850E-15	3.25069E-14	-7.78666E-14
i	-9.23803E-15	-1.40685E-14	9.61385E-12	2.11184E-11	-2.67632E-11	6.06700E-12
Ω	-1.34530E-13	-3.85850E-15	2.11184E-11	4.15619E-10	-4.73264E-10	8.99305E-11
ω	3.33555E-13	3.25069E-14	-2.67632E-11	-4.73264E-10	6.20463E-10	-2.21146E-10
M	-7.39839E-13	-7.78666E-14	6.06700E-12	8.99305E-11	-2.21146E-10	4.66847E-10

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

3.339

3.338

Unit

Source

[3]

[4]

Quality

Value

B,R

Unit

Source

[3]

[4]

Amplitude

Value

0.05

Unit

mag

Source

[4]

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

17.505

17.39

Unit

mag

Source

[5]

[6]

Slope Parameter (G)

Value

-0.01

0.15**

Unit

mag

Source

[6]

[5]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.04

Unit

Source

[8]

Diameter

Value

2118

Unit

Source

[7]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

Unit

mag

Source

[-]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Visual S

Radar R

Unit

Source

[9]

[10]

Satellites

Satellites

Value

Unit

Source

Satellites

Value

Binary Child 1

Unit

Source

[2]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) N. G. Simion et al, Spectral properties of near-Earth objects with low-Jovian Tisserand invariant (2021)
[2]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[3]	EARN	1.) Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html
[4]	EARN	1.) Reddy, V. et al. (2005) I.A.U. Circ. HREF="http://www.cbat.eps.harvard.edu/iauc/08400/08483.html"> 8483. (2005 AB) (photometry, binary system parameters) 2.) Petr Pravec's Ondrejov NEO Photometric Program Webpage "Prepublished Periods" 3.) Reddy, V. et al. (2006) LPSC 37, 1755. (PHOTOMETRIC AND RADAR OBSERVATIONS OF 2005 AB: A NEW BINARY NEAR-EARTH ASTEROID.) 4.) R. Behrend Courbes des lumiere, Observatoire de Geneve website 5.) Krugly, Yu. N. et al. (2006) IAU Symp. 236, 385-390. (Kharkiv study of near-Earth asteroids) (1036,1627,1685, 1862,1980,3103,3200,4179,6611,8567,11405,13553,23187,54509, 66251,100085,1999LF6,2004XP14,2005AB,2006CV69,2006BQ6)
[5]	ESA Aegis	ESA orbit determination and impact monitoring system
[6]	EARN	1.) Pravec, P. et al. (2012) Icarus 221, 365-387 (Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations)
[7]	EARN	1.) Calculated by the NEOCC based on the albedo value
[8]	EARN	1.) DeMeo, F. & R.P. Binzel (2008) Icarus 194, 436-449. (Comets in the near-Earth object population) () 2.) Kumar, S. et al. (2006) LPSC 37, 1113. (ALBEDO ESTIMATES AND NEAR-INFRARED REFLECTANCE SPECTROSCOPY OF NEAR EARTH ASTEROIDS 1999 HF1 AND 2005 AB.)
[9]	EARN	1.) Binzel, R.P. et al. (2006) LPSC 37, 1491. (The MIT-Hawaii-IRTF joint campaign for NEO spectral reconnaissance.) 2.) Binzel, R.P. et al. href="http://smass.mit.edu/minus.html"> Webpage
[10]	EARN	1.) href="http://echo.jpl.nasa.gov/asteroids/index.html">JPL's NEO Radar Detection Program Webpage 2.) Reddy, V. et al. (2006) LPSC 37, 1755. (PHOTOMETRIC AND RADAR OBSERVATIONS OF 2005 AB: A NEW BINARY NEAR-EARTH ASTEROID.)

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

6298

Unit

Source

[1]

Unobserved

Value

1296

Unit

Source

[1]

Normalized RMS of residuals

Value

0.334105

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2005-01-01.42591

Unit

Source

[2]

Last Observation

Value

2022-03-31.137437

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

1800 (4)

Unit

Source

[1]

Radar Summary

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

Radar

Value

Unit

Source

First Observation

Value

2005-02-23

Unit

Source

[3]

Last Observation

Value

2005-02-23

Unit

Source

[3]

Delay (Discarded)

Value

0 (0)

Unit

Source

[-]

Doppler (Discarded)

Value

1 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

1 (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 452561 2005AB 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	2005-03-28 21:38	< 1 min	0.1753240	0.1753239	0.0000001

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
355.88378767	77.58364247	0.17155289	MINIMUM
1.21225769	269.26815795	2.10725688	SADDLE
180.32397079	267.77205605	4.33608766	SADDLE
180.11859303	87.67740872	6.31893099	MAXIMUM

Download:

MOID Plots

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