Asteroids

423321 2005ED318 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Amor

Perihelion (q)

1.017

Aphelion (Q)

2.683

Eccentricity (e)

0.450

Inclination (i)

2.4

deg

Orbit period (P)

919.1

Earth MOID

0.00676

U parameter

0.0

Next Earth close approach

Date

2078-04-29

Nominal distance (from Earth center)

0.08141

12179491

Maximum Brightness

17.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

20.9

mag

Diameter

200

Taxonomic type

Rotation period (T)

17.16

Discovery Information

Discovery Date

2005-03-10

Observatory

Lowell Observatory-LONEOS

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

1.850040

1-sigma variation

1.046E-9

Unit

Eccentricity (e)

Value

0.450184

1-sigma variation

6.820E-9

Unit

Inclination (i)

Value

2.3898

1-sigma variation

2.151E-6

Unit

Long. of Ascending Node (Ω)

Value

82.0406

1-sigma variation

3.065E-5

Unit

Arg. of Perihelion (ω)

Value

164.3717

1-sigma variation

3.201E-5

Unit

Mean Anomaly (M)

Value

52.12562

1-sigma variation

0.00001

Unit

Perihelion distance

Value

1.017182

1-sigma variation

Unit

Aphelion distance

Value

2.682898

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

1.620319

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.011725

1-sigma variation

Unit

MOID

Value

0.006759

1-sigma variation

Unit

Orbit Period

Value

919.1156

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.09453E-18	5.13061E-18	-1.97892E-16	1.85733E-15	4.54456E-15	-5.43258E-15
e	5.13061E-18	4.65169E-17	1.51278E-15	-3.73903E-14	7.13050E-14	-2.29259E-14
i	-1.97892E-16	1.51278E-15	4.62556E-12	-5.71122E-11	5.64908E-11	4.59544E-13
Ω	1.85733E-15	-3.73903E-14	-5.71122E-11	9.39509E-10	-9.55987E-10	5.23240E-12
ω	4.54456E-15	7.13050E-14	5.64908E-11	-9.55987E-10	1.02467E-9	-3.79664E-11
M	-5.43258E-15	-2.29259E-14	4.59544E-13	5.23240E-12	-3.79664E-11	2.81298E-11

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

17.16

Unit

Source

[4]

[5]

Quality

Value

Unit

Source

[5]

Amplitude

Value

0.22

Unit

mag

Source

[5]

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]

[2]

Taxonomy (all)

Value

Unit

Source

[1]

[3]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

20.852

Unit

mag

Source

[6]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[6]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.212

Unit

Source

[8]

[7]

Diameter

Value

200

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]

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Sources

No.	Name	Additional
[1]	EARN	1.) DeMeo, F.E. et al. (2014) Icarus 227, 112-122. (Mars encounters cause fresh surfaces on some near-Earth asteroids) (contains taxonomic classification of 249 NEAs)
[2]	EARN	1.) Alexey V. Sergeyev and Benoit Carry A&A, 652 (2021) A59
[3]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[4]	EARN	1.) Pravec, P.; Wolf, M.; Sarounova, L. (2005) http://www.asu.cas.cz/~ppravec/neo.htm
[5]	EARN	1.) Petr Pravec's Ondrejov NEO Photometric Program Webpage "Prepublished Periods" 2.) R. Behrend Courbes des lumiere, Observatoire de Geneve website
[6]	ESA Aegis	ESA orbit determination and impact monitoring system
[7]	EARN	1.) Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; et al. (2011) Astrophys. J. 741, A90. See also Grav 2012b and Masiero 2012.
[8]	EARN	1.) Mainzer, A. et al. (2011) ApJ 743, 156. (NEOWISE Observations of Near-Earth Objects: Preliminary Results) (albedo and diameters of 428 NEOs)
[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

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

7288

Unit

Source

[1]

Unobserved

Value

2111

Unit

Source

[1]

Normalized RMS of residuals

Value

0.374386

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2000-02-12.482398

Unit

Source

[2]

Last Observation

Value

2020-01-26.55829

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

616 (3)

Unit

Source

[1]

Radar Summary

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

Radar

Value

Unit

Source

First Observation

Value

2005-05-12

Unit

Source

[3]

Last Observation

Value

2005-05-12

Unit

Source

[3]

Delay (Discarded)

Value

1 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

1 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

2 (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 423321 2005ED318 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	2000-04-15 00:35	< 1 s	0.1967843	0.1967839	0.0000001
EARTH	2005-05-23 17:01	< 1 s	0.0162675	0.0162675	0.0000000
EARTH	2010-06-28 11:40	< 1 min	0.0697104	0.0697102	0.0000001
EARTH	2078-04-29 09:53	< 1 min	0.0814149	0.0814141	0.0000003
EARTH	2083-06-02 02:49	< 1 min	0.0088513	0.0088512	0.0000000
EARTH	2088-06-17 09:46	< 1 min	0.0236871	0.0236866	0.0000002
EARTH	2093-07-13 01:05	< 1 s	0.1866263	0.1866261	0.0000001

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
5.04937761	151.94634072	0.00812719	MINIMUM
180.36565111	324.62354669	1.69629607	SADDLE
1.00127296	325.30742664	2.00378236	SADDLE
180.41904014	144.66158515	3.69601892	MAXIMUM

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MOID Plots

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