Asteroids

468468 2004KH17 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.357

Aphelion (Q)

1.067

Eccentricity (e)

0.498

Inclination (i)

22.1

deg

Orbit period (P)

219.5

Earth MOID

0.00470

U parameter

0.7

A₂

-68.8

10^-15au/days²

Next Earth close approach

Date

2028-05-24

Nominal distance (from Earth center)

0.17591

26316489

Maximum Brightness

20.7

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

21.9

mag

Diameter

100

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2004-05-29

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

0.712155

1-sigma variation

3.554E-9

Unit

Eccentricity (e)

Value

0.498129

1-sigma variation

9.846E-8

Unit

Inclination (i)

Value

22.1324

1-sigma variation

2.839E-5

Unit

Long. of Ascending Node (Ω)

Value

79.1102

1-sigma variation

1.054E-5

Unit

Arg. of Perihelion (ω)

Value

340.7285

1-sigma variation

1.538E-5

Unit

Mean Anomaly (M)

Value

112.09792

1-sigma variation

0.00004

Unit

Perihelion distance

Value

0.357410

1-sigma variation

Unit

Aphelion distance

Value

1.066901

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.620596

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.006099

1-sigma variation

Unit

MOID

Value

0.004700

1-sigma variation

Unit

Orbit Period

Value

219.5132

1-sigma variation

Unit

U parameter

Value

0.7

1-sigma variation

Unit

A₂

Value

-68.80132

1-sigma variation

3.83590

Unit

10^-15au/days²

Covariance Matrix

	a	e	i	Ω	ω	M	A₂
a	1.26327E-17	2.56693E-16	7.07599E-14	-1.55555E-14	-1.69186E-14	-2.27385E-14	1.34525E-8
e	2.56693E-16	9.69363E-15	1.87745E-12	-4.83126E-13	-1.00792E-12	1.73554E-12	2.78015E-7
i	7.07599E-14	1.87745E-12	8.06111E-10	-2.58170E-10	-4.03010E-11	1.13814E-10	7.37829E-5
Ω	-1.55555E-14	-4.83126E-13	-2.58170E-10	1.11118E-10	-2.16018E-11	-5.92118E-11	-1.47716E-5
ω	-1.69186E-14	-1.00792E-12	-4.03010E-11	-2.16018E-11	2.36538E-10	-4.26403E-10	-1.91030E-5
M	-2.27385E-14	1.73554E-12	1.13814E-10	-5.92118E-11	-4.26403E-10	1.42620E-9	-2.22984E-5
A₂	1.34525E-8	2.78015E-7	7.37829E-5	-1.47716E-5	-1.91030E-5	-2.22984E-5	1.47141E1

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

[1]

Taxonomy (all)

Value

Unit

Source

[1]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

21.919

Unit

mag

Source

[2]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[2]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.072

Unit

Source

[3]

[4]

Diameter

Value

100

Unit

Source

[3]

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

[5]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) Ieva, S. et al. (2018) Astron. Astrophys. 615, A127. (Photometric survey of 67 near-Earth objects)
[2]	ESA Aegis	ESA orbit determination and impact monitoring system
[3]	EARN	1.) Mainzer, A.; Bauer, J.; Grav, T.; Masiero, J.; et al. (2014) Astrophys. J. 784, A110.
[4]	EARN	1.) Mainzer, A. et al. (2014) Astrophys. J. 784, 110. (The Population of Tiny Near-Earth Objects Observed by NEOWISE)
[5]	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

7674

Unit

Source

[1]

Unobserved

Value

143

Unit

Source

[1]

Normalized RMS of residuals

Value

0.557296

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2004-05-29.31706

Unit

Source

[2]

Last Observation

Value

2025-06-01.95696

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

250 (0)

Unit

Source

[1]

Radar Summary

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

Radar

Value

Unit

Source

First Observation

Value

2013-06-07

Unit

Source

[3]

Last Observation

Value

2013-06-07

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 468468 2004KH17 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	1962-05-21 11:08	< 1 min	0.1994504	0.1994472	0.0000011
EARTH	1965-05-23 17:44	< 1 min	0.1829690	0.1829661	0.0000010
EARTH	1968-05-25 19:22	< 1 min	0.1676121	0.1676095	0.0000009
EARTH	1971-05-28 17:48	< 1 min	0.1524978	0.1524954	0.0000008
EARTH	1974-05-30 15:13	< 1 min	0.1366657	0.1366636	0.0000007
EARTH	1977-06-01 08:39	< 1 min	0.1206078	0.1206058	0.0000007
EARTH	1980-06-02 21:25	< 1 min	0.1043209	0.1043191	0.0000006
EARTH	1983-06-05 00:01	< 1 min	0.0901218	0.0901203	0.0000005
EARTH	1986-06-05 20:13	< 1 min	0.0772474	0.0772461	0.0000005
EARTH	1989-06-06 08:22	< 1 min	0.0675676	0.0675664	0.0000004
EARTH	1992-06-06 12:59	< 1 min	0.0613491	0.0613482	0.0000003
EARTH	1995-06-07 12:41	< 1 min	0.0578930	0.0578923	0.0000002
EARTH	1998-06-07 08:26	< 1 s	0.0569606	0.0569600	0.0000002
EARTH	2001-06-06 22:43	< 1 s	0.0594596	0.0594592	0.0000001
EARTH	2004-06-06 08:55	< 1 s	0.0642359	0.0642357	0.0000001
EARTH	2007-06-06 11:17	< 1 s	0.0732191	0.0732190	0.0000000
EARTH	2010-06-05 08:00	< 1 s	0.0842405	0.0842404	0.0000000
EARTH	2013-06-03 20:52	< 1 s	0.0978678	0.0978678	0.0000000
EARTH	2016-06-02 00:17	< 1 min	0.1136175	0.1136173	0.0000000
EARTH	2019-05-31 21:29	< 1 min	0.1298118	0.1298115	0.0000001
EARTH	2022-05-29 15:56	< 1 min	0.1453679	0.1453674	0.0000002
EARTH	2025-05-27 07:15	< 1 min	0.1606792	0.1606785	0.0000002
EARTH	2028-05-24 20:04	< 1 min	0.1759149	0.1759140	0.0000003
EARTH	2031-05-23 06:13	< 1 min	0.1914228	0.1914216	0.0000004
EARTH	2081-06-09 23:20	< 1 min	0.1701983	0.1701797	0.0000062
EARTH	2084-06-10 06:07	< 1 min	0.1402763	0.1402568	0.0000065
EARTH	2087-06-11 08:32	< 1 min	0.1112415	0.1112215	0.0000067
EARTH	2090-06-11 06:43	< 1 min	0.0861006	0.0860807	0.0000066
EARTH	2093-06-11 00:44	< 1 min	0.0641801	0.0641614	0.0000062
EARTH	2096-06-10 16:24	< 1 min	0.0469398	0.0469235	0.0000054
EARTH	2099-06-11 07:42	< 1 min	0.0375617	0.0375500	0.0000039
EARTH	2102-06-12 02:16	< 1 min	0.0382307	0.0382257	0.0000017
EARTH	2105-06-11 22:57	< 1 min	0.0478593	0.0478564	0.0000010
EARTH	2108-06-11 20:12	< 1 min	0.0655490	0.0655386	0.0000034
EARTH	2111-06-12 14:29	< 1 min	0.0870731	0.0870560	0.0000057
EARTH	2114-06-12 05:35	< 1 min	0.1124676	0.1124445	0.0000077
EARTH	2117-06-11 16:03	< 1 min	0.1400597	0.1400311	0.0000095
EARTH	2120-06-10 22:23	< 1 min	0.1698164	0.1697830	0.0000111

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
212.17607180	156.20978792	0.00322580	MINIMUM
342.78764547	292.88005519	0.64449286	SADDLE
351.36235494	126.89211057	1.36476873	SADDLE
181.14863756	318.99262560	2.05067830	MAXIMUM

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MOID Plots

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