Asteroids

393908 2005UH3 help

Last update: 2025-09-10 09:18 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.784

Aphelion (Q)

2.669

Eccentricity (e)

0.546

Inclination (i)

44.8

deg

Orbit period (P)

828.7

Earth MOID

0.07998

U parameter

0.0

Next Earth close approach

Date

2073-11-16

Nominal distance (from Earth center)

0.08064

12062948

Maximum Brightness

19.9

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

17.5

mag

Diameter

900 - 1900*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2005-10-25

Observatory

Steward Observatory, Kitt Peak-Spacewatch

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

1.726637

1-sigma variation

4.754E-9

Unit

Eccentricity (e)

Value

0.545849

1-sigma variation

4.758E-8

Unit

Inclination (i)

Value

44.7755

1-sigma variation

7.919E-6

Unit

Long. of Ascending Node (Ω)

Value

53.3137

1-sigma variation

2.352E-6

Unit

Arg. of Perihelion (ω)

Value

309.1791

1-sigma variation

5.284E-6

Unit

Mean Anomaly (M)

Value

319.46219

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.784154

1-sigma variation

Unit

Aphelion distance

Value

2.669120

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.087767

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.838019

1-sigma variation

Unit

MOID

Value

0.079982

1-sigma variation

Unit

Orbit Period

Value

828.7048

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.26036E-17	2.30961E-17	-1.39575E-16	1.31189E-15	9.43647E-15	-3.75561E-14
e	2.30961E-17	2.26366E-15	-3.26783E-14	6.42797E-14	9.96597E-14	-1.04971E-13
i	-1.39575E-16	-3.26783E-14	6.27033E-11	1.38513E-11	-8.71228E-12	-6.19797E-12
Ω	1.31189E-15	6.42797E-14	1.38513E-11	5.52966E-12	3.17109E-12	-6.26751E-12
ω	9.43647E-15	9.96597E-14	-8.71228E-12	3.17109E-12	2.79258E-11	-2.24013E-11
M	-3.75561E-14	-1.04971E-13	-6.19797E-12	-6.26751E-12	-2.24013E-11	6.65557E-11

Date of computation: 2025-09-10 09:18 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

17.472

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

900 - 1900*

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

7157

Unit

Source

[1]

Unobserved

Value

143

Unit

Source

[1]

Normalized RMS of residuals

Value

0.525827

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2005-10-25.48876

Unit

Source

[2]

Last Observation

Value

2025-05-30.411604

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

282 (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

2014-11-27

Unit

Source

[3]

Last Observation

Value

2014-11-28

Unit

Source

[3]

Delay (Discarded)

Value

3 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

2 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

5 (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 393908 2005UH3 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	1980-11-13 14:23	< 1 min	0.1114411	0.1114393	0.0000006
EARTH	2014-11-22 11:32	< 1 s	0.1141964	0.1141963	0.0000000
EARTH	2073-11-16 12:48	< 1 min	0.0806358	0.0806347	0.0000004
EARTH	2107-11-25 19:58	< 1 min	0.1462001	0.1461924	0.0000026

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
30.68353026	314.81218238	0.07998186	MINIMUM
294.34695590	153.33431670	0.51938444	MINIMUM
335.98499604	217.84314358	0.72755520	SADDLE
347.38323560	65.67616661	1.67880596	SADDLE
166.27864433	82.58838622	1.93742211	SADDLE
186.71734046	274.12602599	3.55604907	MAXIMUM

Download:

MOID Plots

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