Asteroids

2008FF5 help

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

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.076

Aphelion (Q)

4.501

Eccentricity (e)

0.967

Inclination (i)

2.5

deg

Orbit period (P)

1264.8

Earth MOID

0.00552

U parameter

9.0

Next Earth close approach

Date

2060-03-31

Nominal distance (from Earth center)

0.08099

12115228

Maximum Brightness

22.1

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

23.1

mag

Diameter

60 - 140*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2008-03-28

Observatory

University of Arizona 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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

2.288849

1-sigma variation

0.048830

Unit

Eccentricity (e)

Value

0.966672

1-sigma variation

0.000831

Unit

Inclination (i)

Value

2.5240

1-sigma variation

0.3618

Unit

Long. of Ascending Node (Ω)

Value

14.0259

1-sigma variation

9.6139

Unit

Arg. of Perihelion (ω)

Value

21.2168

1-sigma variation

9.2771

Unit

Mean Anomaly (M)

Value

98.99686

1-sigma variation

29.79150

Unit

Perihelion distance

Value

0.076284

1-sigma variation

Unit

Aphelion distance

Value

4.501414

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.921095

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.511870

1-sigma variation

Unit

MOID

Value

0.005516

1-sigma variation

Unit

Orbit Period

Value

1264.8067

1-sigma variation

Unit

U parameter

Value

9.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.38436E-3	4.06018E-5	-1.76656E-2	-4.69445E-1	4.53000E-1	-1.45471E0
e	4.06018E-5	6.91387E-7	-3.00817E-4	-7.99390E-3	7.71388E-3	-2.47715E-2
i	-1.76656E-2	-3.00817E-4	1.30884E-1	3.47810E0	-3.35626E0	1.07779E1
Ω	-4.69445E-1	-7.99390E-3	3.47810E0	9.24268E1	-8.91891E1	2.86412E2
ω	4.53000E-1	7.71388E-3	-3.35626E0	-8.91891E1	8.60649E1	-2.76379E2
M	-1.45471E0	-2.47715E-2	1.07779E1	2.86412E2	-2.76379E2	8.87531E2

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

23.145

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

60 - 140*

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

6704

Unit

Source

[1]

Normalized RMS of residuals

Value

0.772947

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2008-03-28.32219

Unit

Source

[2]

Last Observation

Value

2008-04-08.17156

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

52 (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 2008FF5 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	1956-03-21 17:04	> 1 mo	0.1052322	0.0210602	2.6358724
EARTH	1973-05-18 15:26	> 1 mo	0.1359786	0.0453108	2.2454880
MARS	1997-07-20 17:23	> 1 mo	0.0463968	0.0459614	0.0924934
MARS	2004-11-02 12:29	> 1 w	0.0409967	0.0247276	0.1810090
EARTH	2008-03-23 08:45	< 1 min	0.0774020	0.0769005	0.0001672
EARTH	2025-05-24 01:30	> 1 mo	0.0368483	0.0339217	0.5493981
VENUS	2046-04-04 14:16	> 1 mo	0.0302952	0.0275729	2.3017097
VENUS	2049-10-30 12:47	> 1 mo	0.0409156	0.0381836	3.0061353
EARTH	2060-03-31 07:22	> 1 mo	0.0809853	0.0000736	17.5867736
MERCURY	2063-08-06 09:59	> 1 mo	0.0435580	0.0155211	26.6206934
EARTH	2067-03-20 14:54	> 1 mo	0.1918679	0.0059447	22.7463831
EARTH	2077-05-30 18:55	> 1 mo	0.1401395	0.0225606	28.2501197
EARTH	2119-03-31 06:40	> 1 mo	0.0393839	0.0119769	7.5175746
MERCURY	2122-08-08 16:27	> 1 mo	0.0248322	0.0247842	0.2030776
EARTH	2126-03-22 14:46	> 1 mo	0.1820720	0.0189735	3.0537064

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
54.30082295	81.41300405	0.00551609	MINIMUM
305.23371916	138.39474581	0.03394088	MINIMUM
356.80122765	278.53311867	0.91955159	SADDLE
356.78580302	98.47630177	1.08053108	SADDLE
179.95001083	110.61541573	3.49562763	SADDLE
179.94594927	290.61722119	5.49546879	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2008FF5

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS	TS
2060-03-27.755	73545.755	-0.002	0.000	0.07 ± 0.008	4.30E5	1.93E-6	1.43E2	-4.02	0
2064-03-27.719	75006.719	-3.248	0.000	0.24 ± 0.006	4.28E6	9.73E-10	1.20E2	-7.42	0


Based on 52 optical observations (of which 2 are rejected as outliers) from 2008/03/28.322 to 2008/04/08.172.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.04 and 1.04 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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