Asteroids

2008JL3 help

Last update: 2026-07-30 11:21 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.975

Aphelion (Q)

3.331

Eccentricity (e)

0.547

Inclination (i)

0.9

deg

Orbit period (P)

1154.0

Earth MOID

0.00009

U parameter

8.1

Next Earth close approach

Date

2027-05-02

Nominal distance (from Earth center)

0.00166

248707

Maximum Brightness

12.4

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

25.3

mag

Diameter

23 - 50*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2008-05-05

Observatory

Lincoln Laboratory ETS, New Mexico

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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

2.153197

1-sigma variation

0.002358

Unit

Eccentricity (e)

Value

0.547100

1-sigma variation

0.000599

Unit

Inclination (i)

Value

0.8916

1-sigma variation

0.0002

Unit

Long. of Ascending Node (Ω)

Value

40.3787

1-sigma variation

0.0089

Unit

Arg. of Perihelion (ω)

Value

155.5882

1-sigma variation

0.0046

Unit

Mean Anomaly (M)

Value

264.25260

1-sigma variation

3.52618

Unit

Perihelion distance

Value

0.975183

1-sigma variation

Unit

Aphelion distance

Value

3.331210

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

2.019256

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.000780

1-sigma variation

Unit

MOID

Value

0.000089

1-sigma variation

Unit

Orbit Period

Value

1154.0482

1-sigma variation

Unit

U parameter

Value

8.1

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	5.55958E-6	1.41293E-6	5.16118E-7	2.10076E-5	1.07303E-5	-8.31430E-3
e	1.41293E-6	3.59085E-7	1.31168E-7	5.33893E-6	2.72700E-6	-2.11302E-3
i	5.16118E-7	1.31168E-7	4.83135E-8	1.95123E-6	9.94799E-7	-7.71850E-4
Ω	2.10076E-5	5.33893E-6	1.95123E-6	7.93830E-5	4.05413E-5	-3.14167E-2
ω	1.07303E-5	2.72700E-6	9.94799E-7	4.05413E-5	2.07402E-5	-1.60471E-2
M	-8.31430E-3	-2.11302E-3	-7.71850E-4	-3.14167E-2	-1.60471E-2	1.24340E1

Date of computation: 2026-07-30 11:21 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

25.323

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

23 - 50*

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

[-]

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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

Unit

Source

[1]

Unobserved

Value

6679

Unit

Source

[1]

Normalized RMS of residuals

Value

0.553575

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2008-05-02.319023

Unit

Source

[2]

Last Observation

Value

2008-05-09.44647

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

39 (2)

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

Filters

Initial Date: *

Final Date: *

Normalised Only accepted

Max residual (arcsec):

* - these fields are required

Plot

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Note: Ephemerides requests are limited to a maximum of 1000 points and a final date not exceeding 2040/12/31 00:00.

Close Approaches for 2008JL3 from 1950 to 2126

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1964-04-08 11:18	> 1 mo	0.0213255	0.0172147	0.0593706
MARS	1977-02-02 06:19	> 1 w	0.0489892	0.0159922	0.3633956
EARTH	1986-04-18 01:50	> 1 mo	0.0225052	0.0025017	0.0641673
EARTH	2008-04-30 20:55	< 1 min	0.0131541	0.0131205	0.0000112
EARTH	2027-05-02 00:50	> 1 mo	0.0016625	0.0000672	0.1214013
EARTH	2037-03-17 06:03	> 1 mo	0.0277413	0.0082042	131.9103576
MARS	2070-02-12 15:59	> 1 mo	0.0295899	0.0227368	919.4669268
EARTH	2090-05-20 13:12	> 1 mo	0.0859878	0.0015795	2990.5556680
EARTH	2100-03-11 22:38	> 1 mo	0.0536426	0.0085172	543.4208176

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
13.40273637	115.20556837	0.00008921	MINIMUM
349.73964425	71.81223321	0.01061143	MINIMUM
1.21071999	92.82353747	0.02619534	SADDLE
1.49050361	273.34286333	1.97449859	SADDLE
180.43470349	272.08650523	2.33173178	SADDLE
180.44045012	92.08996222	4.33176481	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2008JL3

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2027-05-01.379	61526.379	-0.017	1.58 ± 0.000	2.75E3	1.49E-4	7.92E-1	-2.73
2030-04-30.769	62621.769	-4.396	1.39 ± 0.001	2.98E3	1.59E-8	7.67E-1	-7.09
2071-04-30.356	77596.356	-0.980	0.74 ± 0.002	2.73E5	3.04E-6	7.76E-1	-5.75
2075-05-02.115	79059.115	1.785	1.59 ± 0.002	1.08E6	7.32E-8	8.01E-1	-7.39
2077-04-29.012	79787.012	-4.828	1.61 ± 0.005	1.83E4	5.72E-10	7.55E-1	-9.54
2090-05-01.262	84537.262	-0.140	0.38 ± 0.000	1.79E6	7.19E-7	7.86E-1	-6.52
2090-05-01.472	84537.472	-0.105	1.59 ± 0.001	7.45E5	5.38E-7	7.86E-1	-6.64
2090-05-01.503	84537.503	-1.971	0.72 ± 0.000	2.76E5	6.31E-7	7.80E-1	-6.58
2097-04-27.059	87090.059	0.078	0.11 ± 0.110	1.16E9	1.17E-9	7.62E-1	-9.36
2100-04-27.872	88185.872	0.379	1.29 ± 0.001	3.82E5	2.37E-6	7.64E-1	-6.07
2100-04-27.903	88185.903	0.283	0.63 ± 0.003	2.00E6	6.27E-7	7.62E-1	-6.65
2109-04-27.972	91472.972	-0.776	1.02 ± 0.000	6.74E5	1.23E-6	7.56E-1	-6.40
2109-04-28.254	91473.254	-1.210	1.15 ± 0.000	6.25E6	8.28E-8	7.55E-1	-7.58
2110-05-02.939	91842.939	3.086	1.09 ± 0.001	4.43E5	1.93E-8	8.08E-1	-8.19
2112-04-28.397	92569.397	-0.847	1.38 ± 0.000	1.65E6	5.81E-7	7.59E-1	-6.74
2113-05-01.397	92937.397	0.222	1.18 ± 0.000	2.39E6	5.20E-7	7.87E-1	-6.78
2113-05-02.390	92938.390	4.107	0.29 ± 0.000	4.47E4	6.35E-9	8.08E-1	-8.69
2113-05-02.437	92938.437	4.323	0.73 ± 0.000	6.42E4	1.62E-9	8.09E-1	-9.28
2116-04-30.150	94032.150	1.496	1.45 ± 0.001	2.13E5	1.07E-6	7.80E-1	-6.49
2122-05-03.493	96226.493	-2.047	1.57 ± 0.000	1.46E5	4.94E-7	7.81E-1	-6.85


Based on 39 optical observations (of which 2 are rejected as outliers) from 2008/05/02.319 to 2008/05/09.446.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.66 and 1.66 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
AstOD software version= 4.0, Date of computation=20250805 130500.123 UTC.

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