Asteroids

363599 2004FG11 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.438

Aphelion (Q)

2.735

Eccentricity (e)

0.724

Inclination (i)

3.1

deg

Orbit period (P)

729.7

Earth MOID

0.02032

U parameter

0.0

A₂

-64.7

10^-15au/days²

Next Earth close approach

Date

2026-04-11

Nominal distance (from Earth center)

0.05652

8454620

Maximum Brightness

18.2

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

150

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2004-03-23

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

1.586203

1-sigma variation

2.024E-9

Unit

Eccentricity (e)

Value

0.724020

1-sigma variation

6.068E-8

Unit

Inclination (i)

Value

3.1347

1-sigma variation

3.940E-6

Unit

Long. of Ascending Node (Ω)

Value

83.4425

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

228.8143

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

266.80657

1-sigma variation

2.145E-6

Unit

Perihelion distance

Value

0.437761

1-sigma variation

Unit

Aphelion distance

Value

2.734644

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.456524

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.506048

1-sigma variation

Unit

MOID

Value

0.020319

1-sigma variation

Unit

Orbit Period

Value

729.6867

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

A₂

Value

-64.70238

1-sigma variation

4.08064

Unit

10^-15au/days²

Covariance Matrix

	a	e	i	Ω	ω	M	A₂
a	4.09793E-18	4.68979E-18	2.59150E-15	-1.07035E-13	1.08265E-13	-2.57440E-15	6.76843E-9
e	4.68979E-18	3.68146E-15	-6.24139E-14	3.17590E-12	-2.63151E-12	9.80120E-14	-7.67848E-8
i	2.59150E-15	-6.24139E-14	1.55230E-11	-5.55838E-10	5.44943E-10	-2.41873E-12	6.53364E-6
Ω	-1.07035E-13	3.17590E-12	-5.55838E-10	2.04268E-8	-1.99116E-8	1.22472E-10	-2.97178E-4
ω	1.08265E-13	-2.63151E-12	5.44943E-10	-1.99116E-8	1.94778E-8	-1.08406E-10	2.87565E-4
M	-2.57440E-15	9.80120E-14	-2.41873E-12	1.22472E-10	-1.08406E-10	4.60219E-12	-5.95368E-6
A₂	6.76843E-9	-7.67848E-8	6.53364E-6	-2.97178E-4	2.87565E-4	-5.95368E-6	1.66517E1

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

[6]

Quality

Value

2,B,R

1,B,R

Unit

Source

[6]

[11]

Amplitude

Value

0.37

Unit

mag

Source

[11]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

Unit

Source

[-]

Spinvector B

Value

Unit

Source

[-]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

Scomp

Unit

Source

[1]

[2]

[3]

Taxonomy (all)

Value

Unit

Source

[4]

[5]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

21.011

Unit

mag

Source

[7]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[7]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.306

Unit

Source

[10]

Diameter

Value

150

Unit

Source

[8]

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

Visual S

Unit

Source

[12]

[3]

Satellites

Satellites

Value

Unit

Source

Satellites

Value

Binary Child 1

Unit

Source

[4]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) Alexey V. Sergeyev and Benoit Carry A&A, 652 (2021) A59
[2]	EARN	1.) Michaël Marsset et al 2022 AJ 163 165
[3]	EARN	1.) Hicks, M. et al. (2010) href="http://www.astronomerstelegram.org/?read=2571"> ATel#2571 (Palomar Spectroscopy of 2001 FM129, 2004 FG11, and 2005 YU55)
[4]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[5]	EARN	1.) Hicks, M. et al. (2010) href="http://www.astronomerstelegram.org/?read=2571"> ATel#2571 (Palomar Spectroscopy of 2001 FM129, 2004 FG11, and 2005 YU55) 2.) Somers, J.M. et al. (2010) DPS 42, 1316. (abstract) (Optical Characterization Of Planetary Radar Targets, Low-deltaV, And Potentially Hazardous Asteroids: Results From 2009-2010)
[6]	EARN	1.) Taylor, P.A. et al. (2012) CBET HREF="http://www.cbat.eps.harvard.edu/iau/cbet/003000/CBET003091.txt"> 3091. (2004 FG11) (radar detection of a binary system)
[7]	ESA Aegis	ESA orbit determination and impact monitoring system
[8]	EARN	1.) Taylor, P.A. et al. (2012) CBET HREF="http://www.cbat.eps.harvard.edu/iau/cbet/003000/CBET003091.txt"> 3091. (2004 FG11) (radar detection of a binary system) 2.) Mainzer, A.; Bauer, J.; Grav, T.; Masiero, J.; et al. (2014) Astrophys. J. 784, A110.
[9]	EARN	1.) Mainzer, A. et al. (2014) Astrophys. J. 784, 110. (The Population of Tiny Near-Earth Objects Observed by NEOWISE)
[10]	EARN	1.) Mainzer, A. et al. (2014) Astrophys. J. 784, 110. (The Population of Tiny Near-Earth Objects Observed by NEOWISE) 2.) Mainzer, A.; Bauer, J.; Grav, T.; Masiero, J.; et al. (2014) Astrophys. J. 784, A110.
[11]	EARN	1.) Warner, B.D. (2014) MPB 41, 213-224. (NEAR-EARTH ASTEROID LIGHTCURVE ANALYSIS AT CS3-PALMER DIVIDE STATION: 2014 MARCH-JUNE) (38 NEA lightcurve data)
[12]	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

7323

Unit

Source

[1]

Unobserved

Value

524

Unit

Source

[1]

Normalized RMS of residuals

Value

0.520582

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2004-03-23.44656

Unit

Source

[2]

Last Observation

Value

2024-04-10.843431

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

466 (6)

Unit

Source

[1]

Radar Summary

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

Radar

Value

Unit

Source

First Observation

Value

2012-04-07

Unit

Source

[3]

Last Observation

Value

2014-04-10

Unit

Source

[3]

Delay (Discarded)

Value

4 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

4 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

8 (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 363599 2004FG11 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
VENUS	1974-03-27 18:16	< 1 min	0.0032023	0.0032013	0.0000003
EARTH	2000-04-04 00:21	< 1 s	0.1806248	0.1806244	0.0000001
EARTH	2002-04-05 18:28	< 1 s	0.1529788	0.1529785	0.0000001
EARTH	2004-04-06 22:28	< 1 s	0.1218424	0.1218422	0.0000001
MERCURY	2004-05-23 21:58	< 1 s	0.0438618	0.0438615	0.0000001
EARTH	2006-04-08 14:34	< 1 s	0.0996009	0.0996007	0.0000001
EARTH	2008-04-09 04:26	< 1 s	0.0794755	0.0794754	0.0000000
EARTH	2010-04-10 15:42	< 1 s	0.0647585	0.0647585	0.0000000
MERCURY	2010-05-20 20:36	< 1 s	0.0390017	0.0390015	0.0000001
EARTH	2012-04-10 18:40	< 1 s	0.0573634	0.0573634	0.0000000
MARS	2014-02-11 23:09	< 1 s	0.0476147	0.0476144	0.0000001
EARTH	2014-04-11 15:21	< 1 s	0.0526568	0.0526567	0.0000000
EARTH	2016-04-11 16:38	< 1 s	0.0495647	0.0495647	0.0000000
EARTH	2018-04-12 05:22	< 1 s	0.0494845	0.0494845	0.0000000
EARTH	2020-04-11 17:59	< 1 s	0.0492049	0.0492049	0.0000000
EARTH	2022-04-12 05:50	< 1 s	0.0494227	0.0494226	0.0000000
EARTH	2024-04-11 09:35	< 1 s	0.0520957	0.0520956	0.0000000
EARTH	2026-04-11 08:42	< 1 s	0.0565156	0.0565156	0.0000000
EARTH	2028-04-10 10:25	< 1 s	0.0639279	0.0639278	0.0000001
EARTH	2030-04-09 23:42	< 1 s	0.0791050	0.0791047	0.0000001
MERCURY	2030-05-26 00:19	< 1 min	0.0374395	0.0374393	0.0000001
EARTH	2032-04-08 10:26	< 1 s	0.0975299	0.0975295	0.0000001
EARTH	2034-04-07 19:06	< 1 s	0.1205123	0.1205118	0.0000002
EARTH	2036-04-05 21:30	< 1 s	0.1497456	0.1497450	0.0000002
EARTH	2038-04-04 22:43	< 1 min	0.1777881	0.1777873	0.0000003
MERCURY	2044-05-09 16:40	< 1 min	0.0372230	0.0372227	0.0000001
VENUS	2078-03-14 13:57	< 1 min	0.0380902	0.0380877	0.0000008
VENUS	2080-05-07 16:42	< 1 min	0.0026012	0.0025998	0.0000005
MERCURY	2090-05-06 07:19	23.8	0.0387289	0.0386777	0.0000172
EARTH	2092-04-04 17:28	7.7	0.1938630	0.1935206	0.0001142
EARTH	2094-04-10 09:20	9.2	0.0911855	0.0908315	0.0001181
EARTH	2096-04-14 16:00	10.3	0.0527123	0.0525074	0.0000688
EARTH	2098-04-20 18:03	12.4	0.1479414	0.1474366	0.0001683
MERCURY	2106-07-06 17:04	56.0	0.0391120	0.0388448	0.0000910

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
58.61741261	319.67574088	0.02035903	MINIMUM
300.70243192	99.36077885	0.04794562	MINIMUM
359.14444822	208.88148432	0.57664130	SADDLE
359.09199892	28.71555485	1.42361865	SADDLE
179.88630019	29.75875448	1.75017510	SADDLE
179.81401752	209.72517192	3.74812571	MAXIMUM

Download:

MOID Plots

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