Asteroids

387816 2004FM17 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.664

Aphelion (Q)

1.107

Eccentricity (e)

0.250

Inclination (i)

6.8

deg

Orbit period (P)

304.2

Earth MOID

0.05929

U parameter

0.0

Next Earth close approach

Date

2029-05-09

Nominal distance (from Earth center)

0.15678

23453889

Maximum Brightness

18.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

19.4

mag

Diameter

300 - 800*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2004-03-26

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.885203

1-sigma variation

1.321E-9

Unit

Eccentricity (e)

Value

0.250073

1-sigma variation

1.037E-7

Unit

Inclination (i)

Value

6.7615

1-sigma variation

5.442E-6

Unit

Long. of Ascending Node (Ω)

Value

169.7235

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

196.5919

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

195.89631

1-sigma variation

0.00003

Unit

Perihelion distance

Value

0.663837

1-sigma variation

Unit

Aphelion distance

Value

1.106568

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.097186

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.337548

1-sigma variation

Unit

MOID

Value

0.059285

1-sigma variation

Unit

Orbit Period

Value

304.2023

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.74610E-18	6.74258E-17	-1.71847E-15	-8.68859E-15	-1.86824E-15	9.14700E-15
e	6.74258E-17	1.07469E-14	-3.13123E-15	-3.59061E-14	-5.75834E-13	1.81227E-12
i	-1.71847E-15	-3.13123E-15	2.96151E-11	2.49846E-10	-2.67833E-10	2.92167E-11
Ω	-8.68859E-15	-3.59061E-14	2.49846E-10	2.96263E-9	-3.08895E-9	2.19515E-10
ω	-1.86824E-15	-5.75834E-13	-2.67833E-10	-3.08895E-9	3.56682E-9	-7.24461E-10
M	9.14700E-15	1.81227E-12	2.92167E-11	2.19515E-10	-7.24461E-10	9.25693E-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

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

19.435

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

300 - 800*

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

Radar R

Unit

Source

[3]

Download this part as:

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	Estimation	Estimated from absolute magnitude
[3]	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

7351

Unit

Source

[1]

Unobserved

Value

547

Unit

Source

[1]

Normalized RMS of residuals

Value

0.476905

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2004-03-23.45397

Unit

Source

[2]

Last Observation

Value

2024-05-08.5977

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

227 (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

2014-05-04

Unit

Source

[3]

Last Observation

Value

2014-05-04

Unit

Source

[3]

Delay (Discarded)

Value

1 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

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 387816 2004FM17 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	1953-02-07 01:58	< 1 min	0.1238844	0.1238838	0.0000002
EARTH	1958-02-07 15:23	< 1 min	0.1500455	0.1500450	0.0000002
EARTH	1963-02-08 14:37	< 1 min	0.1841606	0.1841600	0.0000002
EARTH	1994-05-08 13:50	< 1 min	0.1937268	0.1937261	0.0000002
EARTH	1999-05-09 11:02	< 1 min	0.1696257	0.1696252	0.0000002
EARTH	2004-05-08 22:41	< 1 min	0.1511750	0.1511747	0.0000001
EARTH	2009-05-09 07:37	< 1 min	0.1440431	0.1440430	0.0000001
EARTH	2014-05-09 14:40	< 1 min	0.1352572	0.1352572	0.0000000
EARTH	2019-05-09 17:57	< 1 min	0.1359034	0.1359033	0.0000001
EARTH	2024-05-09 02:54	< 1 min	0.1439797	0.1439794	0.0000001
EARTH	2029-05-09 06:21	< 1 min	0.1567796	0.1567791	0.0000001
EARTH	2034-05-08 20:50	< 1 min	0.1843578	0.1843572	0.0000002
EARTH	2063-02-09 04:48	< 1 min	0.1698562	0.1698556	0.0000002
EARTH	2068-02-08 18:26	< 1 min	0.1332322	0.1332318	0.0000001
EARTH	2073-02-07 22:57	< 1 min	0.1096537	0.1096535	0.0000001
EARTH	2078-02-08 06:25	< 1 min	0.0928246	0.0928242	0.0000001
EARTH	2083-02-08 12:22	< 1 min	0.0941223	0.0941218	0.0000001
EARTH	2088-02-08 18:59	< 1 min	0.1055683	0.1055677	0.0000002
EARTH	2093-02-08 01:27	< 1 min	0.1320187	0.1320180	0.0000003
EARTH	2098-02-09 03:52	< 1 min	0.1775810	0.1775801	0.0000003
EARTH	2119-05-11 03:22	< 1 min	0.1995382	0.1995363	0.0000006
EARTH	2124-05-11 06:28	< 1 min	0.1556658	0.1556639	0.0000006

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
125.43898890	40.10509844	0.05937755	MINIMUM
226.48878168	119.90738886	0.10112472	MINIMUM
186.79878654	88.36762841	0.11512604	SADDLE
356.48684189	260.86174184	0.33895288	SADDLE
355.01321401	78.95579780	1.66114084	SADDLE
176.43901454	260.39494282	2.10837088	MAXIMUM

Download:

MOID Plots

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