Asteroids

464798 2004JX20 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.662

Aphelion (Q)

1.141

Eccentricity (e)

0.266

Inclination (i)

10.5

deg

Orbit period (P)

312.7

Earth MOID

0.09473

U parameter

0.0

Next Earth close approach

Date

2028-06-10

Nominal distance (from Earth center)

0.14013

20963266

Maximum Brightness

16.7

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

19.3

mag

Diameter

1140

Taxonomic type

Rotation period (T)

9.240

Discovery Information

Discovery Date

2004-05-15

Observatory

Catalina Sky 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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.901602

1-sigma variation

6.214E-10

Unit

Eccentricity (e)

Value

0.265680

1-sigma variation

4.509E-8

Unit

Inclination (i)

Value

10.5349

1-sigma variation

6.911E-6

Unit

Long. of Ascending Node (Ω)

Value

101.7389

1-sigma variation

1.879E-5

Unit

Arg. of Perihelion (ω)

Value

349.1283

1-sigma variation

1.993E-5

Unit

Mean Anomaly (M)

Value

166.42438

1-sigma variation

0.00003

Unit

Perihelion distance

Value

0.662065

1-sigma variation

Unit

Aphelion distance

Value

1.141140

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.318983

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.115637

1-sigma variation

Unit

MOID

Value

0.094734

1-sigma variation

Unit

Orbit Period

Value

312.6950

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.86150E-19	-1.40667E-17	-4.63135E-16	2.78520E-15	-7.83350E-15	6.76035E-15
e	-1.40667E-17	2.03326E-15	-1.67763E-13	2.66746E-13	4.48408E-13	-1.20188E-12
i	-4.63135E-16	-1.67763E-13	4.77667E-11	-1.16161E-10	5.25645E-11	1.15679E-10
Ω	2.78520E-15	2.66746E-13	-1.16161E-10	3.53045E-10	-2.27990E-10	-2.25900E-10
ω	-7.83350E-15	4.48408E-13	5.25645E-11	-2.27990E-10	3.97245E-10	-2.72315E-10
M	6.76035E-15	-1.20188E-12	1.15679E-10	-2.25900E-10	-2.72315E-10	8.56851E-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

9.240

Unit

Source

[4]

[1]

Quality

Value

1,T,U

Unit

Source

[4]

Amplitude

Value

0.5

0.38

Unit

mag

Source

[1]

[4]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

234

Unit

Source

[1]

Spinvector B

Value

Unit

Source

[1]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

Unit

Source

[2]

Taxonomy (all)

Value

Unit

Source

[3]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

19.345

Unit

mag

Source

[5]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[5]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.025

0.024

Unit

Source

[7]

[6]

Diameter

Value

1140

Unit

Source

[6]

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

[8]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) Lowell Observatory Near-Earth Asteroid Photometric Survey (NEAPS): Paper 3. Skiff, Brian A et al.
[2]	EARN	1.) Michaël Marsset et al 2022 AJ 163 165
[3]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[4]	EARN	1.) Warner, B.D. (2016) MPB 43, 311-319. (NEAR-EARTH ASTEROID LIGHTCURVE ANALYSIS AT CS3-PALMER DIVIDE STATION: 2016 APRIL-JULY)(31 NEAs)
[5]	ESA Aegis	ESA orbit determination and impact monitoring system
[6]	EARN	1.) Mainzer, A. et al. (2011) ApJ 743, 156. (NEOWISE Observations of Near-Earth Objects: Preliminary Results) (albedo and diameters of 428 NEOs) 2.) Trilling, D.E. et al. (2010) Astron. J. 140, 770-784. (EXPLORENEOs. I. DESCRIPTION AND FIRST RESULTS FROM THE WARM SPITZER NEAR-EARTH OBJECT SURVEY) (diameters & albedos for 101 NEOs)
[7]	EARN	1.) Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; et al. (2011) Astrophys. J. 741, A90. See also Grav 2012b and Masiero 2012. 2.) Masiero, J.R. et al. (2018) Astron. J. 154_168(10pp). (NEOWISE Reactivation Mission Year Three: Asteroid Diameters and Albedos) (170NEOs, 6110MBAs) 3.) Trilling, D.E. et al. (2010) Astron. J. 140, 770-784. (EXPLORENEOs. I. DESCRIPTION AND FIRST RESULTS FROM THE WARM SPITZER NEAR-EARTH OBJECT SURVEY) (diameters & albedos for 101 NEOs)
[8]	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

7280

Unit

Source

[1]

Unobserved

Value

524

Unit

Source

[1]

Normalized RMS of residuals

Value

0.41517

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2004-05-15.33461

Unit

Source

[2]

Last Observation

Value

2024-04-20.41515

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

987 (8)

Unit

Source

[1]

Radar Summary

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

Radar

Value

Unit

Source

First Observation

Value

2016-06-13

Unit

Source

[3]

Last Observation

Value

2016-06-13

Unit

Source

[3]

Delay (Discarded)

Value

2 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

2 (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 464798 2004JX20 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	1951-07-21 14:27	< 1 min	0.0972789	0.0972787	0.0000001
VENUS	1951-12-08 17:57	< 1 min	0.0408710	0.0408704	0.0000002
EARTH	1957-07-22 23:19	< 1 min	0.0960411	0.0960409	0.0000001
EARTH	1963-07-26 14:29	< 1 min	0.0942158	0.0942156	0.0000001
EARTH	1969-07-29 19:55	< 1 min	0.0968533	0.0968530	0.0000001
EARTH	1975-08-01 22:23	< 1 min	0.1056459	0.1056455	0.0000001
VENUS	1975-11-22 07:32	< 1 min	0.0489632	0.0489629	0.0000001
EARTH	1981-08-03 12:15	< 1 min	0.1304584	0.1304580	0.0000001
EARTH	1987-08-04 16:36	< 1 min	0.1830166	0.1830162	0.0000001
EARTH	1998-05-08 06:31	< 1 min	0.1979908	0.1979905	0.0000001
EARTH	2004-05-10 22:01	< 1 min	0.1641112	0.1641110	0.0000001
EARTH	2010-05-20 07:42	< 1 min	0.1494110	0.1494108	0.0000001
VENUS	2010-12-31 23:26	< 1 min	0.0497566	0.0497561	0.0000002
EARTH	2016-05-26 01:38	< 1 min	0.1462869	0.1462868	0.0000000
EARTH	2022-06-03 00:15	< 1 min	0.1433700	0.1433699	0.0000000
EARTH	2028-06-10 09:50	< 1 min	0.1401308	0.1401307	0.0000000
EARTH	2034-06-15 18:27	< 1 min	0.1378863	0.1378862	0.0000000
EARTH	2040-06-20 07:39	< 1 min	0.1337341	0.1337340	0.0000000
EARTH	2046-06-28 01:01	< 1 min	0.1272213	0.1272213	0.0000000
EARTH	2052-07-03 16:35	< 1 min	0.1204707	0.1204706	0.0000000
VENUS	2054-08-26 19:24	< 1 min	0.0388178	0.0388176	0.0000001
EARTH	2058-07-09 01:41	< 1 min	0.1142061	0.1142059	0.0000001
EARTH	2064-07-15 10:29	< 1 min	0.1042803	0.1042801	0.0000001
EARTH	2070-07-22 17:28	< 1 min	0.0969652	0.0969650	0.0000001
VENUS	2074-05-11 04:11	< 1 min	0.0404151	0.0404139	0.0000004
EARTH	2076-07-26 04:19	< 1 min	0.0958021	0.0958019	0.0000001
EARTH	2082-07-28 20:23	< 1 min	0.0967758	0.0967750	0.0000003
EARTH	2088-07-31 18:14	< 1 min	0.1059609	0.1059576	0.0000011
EARTH	2094-08-03 16:33	< 1 min	0.1282621	0.1282551	0.0000023
EARTH	2100-08-04 21:55	< 1 min	0.1549510	0.1549431	0.0000027
EARTH	2117-05-09 01:53	< 1 min	0.1900291	0.1900287	0.0000001
EARTH	2123-05-11 10:26	< 1 min	0.1679653	0.1679635	0.0000006

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
222.43851406	201.56646151	0.09580454	MINIMUM
349.79289552	336.18319560	0.32495420	SADDLE
357.81590791	166.32923196	1.67765961	SADDLE
180.02813385	348.67494089	2.12474147	MAXIMUM

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MOID Plots

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