Asteroids

242708 2005UK1 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.762

Aphelion (Q)

4.241

Eccentricity (e)

0.695

Inclination (i)

0.8

deg

Orbit period (P)

1445.2

Earth MOID

0.01105

U parameter

0.0

Next Earth close approach

Date

2026-01-12

Nominal distance (from Earth center)

0.08259

12355632

Maximum Brightness

16.9

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

18.1

mag

Diameter

710

Taxonomic type

Rotation period (T)

4.300

Discovery Information

Discovery Date

2005-10-24

Observatory

Mt. Lemmon 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

2.501598

1-sigma variation

6.612E-9

Unit

Eccentricity (e)

Value

0.695381

1-sigma variation

9.270E-9

Unit

Inclination (i)

Value

0.7921

1-sigma variation

3.925E-6

Unit

Long. of Ascending Node (Ω)

Value

180.2957

1-sigma variation

0.0005

Unit

Arg. of Perihelion (ω)

Value

345.9253

1-sigma variation

0.0005

Unit

Mean Anomaly (M)

Value

338.08435

1-sigma variation

4.665E-6

Unit

Perihelion distance

Value

0.762035

1-sigma variation

Unit

Aphelion distance

Value

4.241162

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.225687

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

2.964059

1-sigma variation

Unit

MOID

Value

0.011049

1-sigma variation

Unit

Orbit Period

Value

1445.1894

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.37145E-17	-3.08882E-17	3.74197E-16	2.94660E-14	-1.80953E-14	-3.08159E-14
e	-3.08882E-17	8.59276E-17	1.04026E-15	-5.45395E-16	-2.63415E-14	2.03403E-14
i	3.74197E-16	1.04026E-15	1.54031E-11	1.59238E-9	-1.59185E-9	-4.70511E-13
Ω	2.94660E-14	-5.45395E-16	1.59238E-9	2.08651E-7	-2.08607E-7	-4.83025E-11
ω	-1.80953E-14	-2.63415E-14	-1.59185E-9	-2.08607E-7	2.08571E-7	4.06892E-11
M	-3.08159E-14	2.03403E-14	-4.70511E-13	-4.83025E-11	4.06892E-11	2.17627E-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

4.300

Unit

Source

[7]

Quality

Value

Unit

Source

[7]

Amplitude

Value

0.13

Unit

mag

Source

[7]

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]

[4]

[5]

Taxonomy (all)

Value

Unit

Source

[6]

[4]

[6]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

18.125

Unit

mag

Source

[8]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[8]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.048

Unit

Source

[2]

Diameter

Value

710

Unit

Source

[2]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

0.5301

0.4781

0.3339

-0.196

0.052

-0.144

Unit

g-i

g-r

g-z

i-z

r-i

r-z

Source

[1]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Radar R

Unit

Source

[9]

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Sources

No.	Name	Additional
[1]	EARN	1.) A. V. Sergeyev, B. Carry et al A&A, 658 (2022) A109
[2]	EARN	1.) N. G. Simion et al, Spectral properties of near-Earth objects with low-Jovian Tisserand invariant (2021)
[3]	EARN	1.) Alexey V. Sergeyev and Benoit Carry A&A, 652 (2021) A59
[4]	EARN	1.) Ieva, S. et al. (2018) Astron. Astrophys. 615, A127. (Photometric survey of 67 near-Earth objects)
[5]	EARN	1.) Michaël Marsset et al 2022 AJ 163 165
[6]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[7]	EARN	1.) Carbognani, A. (2014) MPB 41, 265-270. (ASTEROIDS LIGHTCURVES AT OAVDA: 2013 DECEMBER - 2014 JUNE) (21374, 53435,143649,242708,243566,251346,2013XY8,2014CU13)
[8]	ESA Aegis	ESA orbit determination and impact monitoring system
[9]	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

6066

Unit

Source

[1]

Unobserved

Value

1214

Unit

Source

[1]

Normalized RMS of residuals

Value

0.559095

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2005-10-24.36977

Unit

Source

[2]

Last Observation

Value

2022-06-03.23303

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

608 (7)

Unit

Source

[1]

Radar Summary

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

Radar

Value

Unit

Source

First Observation

Value

2014-05-19

Unit

Source

[3]

Last Observation

Value

2014-05-21

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 242708 2005UK1 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	2014-05-20 19:34	< 1 s	0.0942357	0.0942357	0.0000000
EARTH	2018-04-24 10:28	< 1 min	0.1410783	0.1410781	0.0000001
EARTH	2026-01-12 10:25	< 1 min	0.0825923	0.0825915	0.0000003
EARTH	2029-12-24 06:26	< 1 min	0.1543049	0.1543039	0.0000003
EARTH	2101-05-25 16:20	< 1 min	0.1551486	0.1551476	0.0000004
EARTH	2105-04-29 10:33	< 1 min	0.1219927	0.1219920	0.0000002
EARTH	2113-01-21 12:59	< 1 min	0.1300273	0.1300270	0.0000001
EARTH	2116-12-25 01:08	< 1 s	0.1552697	0.1552694	0.0000001

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
30.99005117	129.64847082	0.01100112	MINIMUM
330.76153532	0.77699402	0.01318625	MINIMUM
1.13845129	65.57202947	0.23101882	SADDLE
1.16242303	245.61311573	1.76872120	SADDLE
180.20614635	244.28489373	3.23305211	SADDLE
180.20453742	64.28138686	5.23277491	MAXIMUM

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MOID Plots

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