Asteroids

302831 2003FH help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.638

Aphelion (Q)

2.140

Eccentricity (e)

0.541

Inclination (i)

25.8

deg

Orbit period (P)

597.9

Earth MOID

0.01264

U parameter

0.0

Next Earth close approach

Date

2026-04-07

Nominal distance (from Earth center)

0.18558

27762590

Maximum Brightness

18.5

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

19.1

mag

Diameter

400 - 900*

Taxonomic type

Rotation period (T)

13.94

Discovery Information

Discovery Date

2003-03-23

Observatory

Palomar Mountain/NEAT

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

1.388932

1-sigma variation

3.101E-9

Unit

Eccentricity (e)

Value

0.540752

1-sigma variation

2.689E-8

Unit

Inclination (i)

Value

25.7953

1-sigma variation

6.944E-6

Unit

Long. of Ascending Node (Ω)

Value

24.0858

1-sigma variation

4.682E-6

Unit

Arg. of Perihelion (ω)

Value

274.4093

1-sigma variation

6.667E-6

Unit

Mean Anomaly (M)

Value

245.86613

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.637864

1-sigma variation

Unit

Aphelion distance

Value

2.140000

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.053213

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.021068

1-sigma variation

Unit

MOID

Value

0.012636

1-sigma variation

Unit

Orbit Period

Value

597.8883

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	9.61433E-18	-8.77518E-18	8.79541E-16	5.61971E-16	3.04622E-15	-3.30403E-14
e	-8.77518E-18	7.22825E-16	4.50747E-14	-3.76771E-14	6.50293E-14	-3.11051E-14
i	8.79541E-16	4.50747E-14	4.82247E-11	2.46953E-12	5.90247E-13	-4.44071E-12
Ω	5.61971E-16	-3.76771E-14	2.46953E-12	2.19230E-11	-2.12594E-11	-5.69090E-12
ω	3.04622E-15	6.50293E-14	5.90247E-13	-2.12594E-11	4.44531E-11	-2.17907E-11
M	-3.30403E-14	-3.11051E-14	-4.44071E-12	-5.69090E-12	-2.17907E-11	1.28213E-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

13.94

Unit

Source

[3]

Quality

Value

Unit

Source

[3]

Amplitude

Value

0.99

Unit

mag

Source

[3]

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

19.068

Unit

mag

Source

[4]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[4]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[5]

Diameter

Value

400 - 900*

Unit

Source

[5]

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

[6]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) Thomas, C.A. et al. (2014) Icarus 228, 217-246. (Physical characterization of Warm Spitzer-observed near-Earth objects)
[2]	EARN	1.) Thomas, C.A. et al. (2014) Icarus 228, 217-246. (Physical characterization of Warm Spitzer-observed near-Earth objects) 2.) 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)
[3]	EARN	1.) Skiff, B.A. (2011) Posting on CALL web site. http://www.minorplanet.info/call.html
[4]	ESA Aegis	ESA orbit determination and impact monitoring system
[5]	Estimation	Estimated from absolute magnitude
[6]	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

6823

Unit

Source

[1]

Unobserved

Value

1433

Unit

Source

[1]

Normalized RMS of residuals

Value

0.470068

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2003-03-23.45187

Unit

Source

[2]

Last Observation

Value

2021-11-26.620127

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

408 (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

2011-10-25

Unit

Source

[3]

Last Observation

Value

2011-10-25

Unit

Source

[3]

Delay (Discarded)

Value

2 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

1 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

3 (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 302831 2003FH 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	1954-04-12 03:32	< 1 min	0.0756329	0.0756310	0.0000006
EARTH	1957-10-30 00:37	< 1 min	0.1970853	0.1970832	0.0000007
EARTH	1972-04-07 04:39	< 1 min	0.1766613	0.1766588	0.0000008
EARTH	1975-10-25 13:26	< 1 min	0.0944008	0.0943984	0.0000008
EARTH	1993-10-22 01:08	< 1 min	0.0419609	0.0419602	0.0000002
EARTH	2011-10-24 00:38	< 1 s	0.0653292	0.0653292	0.0000000
EARTH	2026-04-07 12:35	< 1 min	0.1855815	0.1855806	0.0000003
EARTH	2029-10-26 00:53	< 1 min	0.1126898	0.1126888	0.0000003
EARTH	2044-04-08 10:39	< 1 min	0.1551772	0.1551758	0.0000005
EARTH	2047-10-27 22:01	< 1 min	0.1392838	0.1392823	0.0000005
EARTH	2062-04-09 21:48	< 1 min	0.1351455	0.1351443	0.0000004
EARTH	2065-10-28 10:59	< 1 min	0.1598209	0.1598197	0.0000004
EARTH	2080-04-11 01:41	< 1 s	0.0994222	0.0994220	0.0000001
EARTH	2098-04-14 12:46	< 1 min	0.0363989	0.0363979	0.0000003
EARTH	2116-04-13 11:00	< 1 s	0.0711912	0.0711906	0.0000002

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
300.18090563	102.23042920	0.01343530	MINIMUM
56.49772938	285.90730643	0.03325276	MINIMUM
358.06087384	193.17417655	0.52121771	SADDLE
178.88013539	15.92845844	1.32412215	SADDLE
358.86191948	14.83574628	1.58343781	SADDLE
180.27797504	196.76412206	3.08662174	MAXIMUM

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MOID Plots

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