Asteroids

444584 2006UK help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.689

Aphelion (Q)

2.299

Eccentricity (e)

0.539

Inclination (i)

4.7

deg

Orbit period (P)

667.0

Earth MOID

0.01403

U parameter

0.0

Next Earth close approach

Date

2058-05-02

Nominal distance (from Earth center)

0.03168

4738950

Maximum Brightness

15.5

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

20.2

mag

Diameter

250 - 600*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2006-10-17

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

1.493957

1-sigma variation

5.844E-9

Unit

Eccentricity (e)

Value

0.538970

1-sigma variation

1.469E-8

Unit

Inclination (i)

Value

4.7450

1-sigma variation

6.909E-6

Unit

Long. of Ascending Node (Ω)

Value

243.9229

1-sigma variation

2.056E-5

Unit

Arg. of Perihelion (ω)

Value

252.3511

1-sigma variation

2.062E-5

Unit

Mean Anomaly (M)

Value

111.88196

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.688759

1-sigma variation

Unit

Aphelion distance

Value

2.299155

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.253013

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.076142

1-sigma variation

Unit

MOID

Value

0.014030

1-sigma variation

Unit

Orbit Period

Value

666.9687

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.41562E-17	-5.68645E-17	-1.87868E-15	-6.14053E-15	-6.69176E-15	-5.28782E-14
e	-5.68645E-17	2.15875E-16	1.27740E-14	-4.67105E-14	8.81058E-14	8.69224E-14
i	-1.87868E-15	1.27740E-14	4.77327E-11	-1.29269E-10	1.27991E-10	3.85425E-12
Ω	-6.14053E-15	-4.67105E-14	-1.29269E-10	4.22619E-10	-4.19140E-10	8.49545E-12
ω	-6.69176E-15	8.81058E-14	1.27991E-10	-4.19140E-10	4.25096E-10	1.07201E-11
M	-5.28782E-14	8.69224E-14	3.85425E-12	8.49545E-12	1.07201E-11	8.20848E-11

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]

[2]

[3]

Taxonomy (all)

Value

Unit

Source

[1]

[4]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

20.157

Unit

mag

Source

[5]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[5]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[6]

Diameter

Value

250 - 600*

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

Visual S

Radar R

Unit

Source

[1]

[7]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) Popescu, M. et al. (2018) MNRAS 477, 2786-2795. (Olivine-rich asteroids in the near-Earth space)(293726, 444584,2012NP,2014YS34,2015HB117,2015LH,2015TB179,2015TW144)
[2]	EARN	1.) Alexey V. Sergeyev and Benoit Carry A&A, 652 (2021) A59
[3]	EARN	1.) Michaël Marsset et al 2022 AJ 163 165
[4]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[5]	ESA Aegis	ESA orbit determination and impact monitoring system
[6]	Estimation	Estimated from absolute magnitude
[7]	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

4051

Unit

Source

[1]

Unobserved

Value

2893

Unit

Source

[1]

Normalized RMS of residuals

Value

0.51664

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2006-10-17.10232

Unit

Source

[2]

Last Observation

Value

2017-11-18.729236

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

380 (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

2017-11-15

Unit

Source

[3]

Last Observation

Value

2017-11-16

Unit

Source

[3]

Delay (Discarded)

Value

3 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

1 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

4 (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 444584 2006UK 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	1965-05-02 07:24	< 1 min	0.0368818	0.0368793	0.0000008
EARTH	1966-11-16 04:57	< 1 min	0.0159872	0.0159868	0.0000001
EARTH	1986-12-09 07:11	< 1 min	0.1866275	0.1866253	0.0000007
EARTH	1996-04-09 03:44	< 1 min	0.1926860	0.1926843	0.0000006
EARTH	2016-05-03 15:43	< 1 s	0.0457748	0.0457746	0.0000000
EARTH	2017-11-17 21:08	< 1 s	0.0222605	0.0222605	0.0000000
EARTH	2058-05-02 13:25	< 1 min	0.0316779	0.0316777	0.0000001
EARTH	2059-11-17 21:36	< 1 min	0.0135105	0.0135095	0.0000003
EARTH	2069-04-11 23:48	4.5	0.1843873	0.1843417	0.0000152
EARTH	2070-11-07 07:36	1.5	0.1777439	0.1776817	0.0000208
EARTH	2111-05-08 09:59	4.4	0.0803595	0.0802056	0.0000513
EARTH	2112-11-25 11:08	6.5	0.0913131	0.0911686	0.0000482
EARTH	2122-04-29 03:33	< 1 min	0.0715588	0.0715503	0.0000028
EARTH	2123-11-16 00:51	1.1	0.0504412	0.0504035	0.0000126

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
309.06696518	312.70565108	0.01404666	MINIMUM
53.24443561	118.25183725	0.03256711	MINIMUM
1.76814500	36.41462927	0.30495860	SADDLE
180.50113416	214.48307669	1.29120356	SADDLE
1.35116752	215.64437649	1.70080456	SADDLE
180.30185869	34.36679510	3.28328735	MAXIMUM

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MOID Plots

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