Asteroids

2007UW1 help

Last update: 2026-10-07 14:31 UTC

Orbital Properties

Epoch

61400.0

MJD

Orbit type

Aten

Perihelion (q)

0.799

Aphelion (Q)

1.018

Eccentricity (e)

0.120

Inclination (i)

8.2

deg

Orbit period (P)

316.1

Earth MOID

0.00037

U parameter

0.3

Next Earth close approach

Date

2039-06-10

Nominal distance (from Earth center)

0.16752

25060714

Maximum Brightness

24.8

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

22.7

mag

Diameter

80 - 170*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2007-10-17

Observatory

Lowell Observatory-LONEOS

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

61400.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.908214

1-sigma variation

2.770E-9

Unit

Eccentricity (e)

Value

0.120355

1-sigma variation

1.707E-7

Unit

Inclination (i)

Value

8.2211

1-sigma variation

2.440E-5

Unit

Long. of Ascending Node (Ω)

Value

25.7938

1-sigma variation

1.158E-5

Unit

Arg. of Perihelion (ω)

Value

146.5393

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

292.14566

1-sigma variation

0.00010

Unit

Perihelion distance

Value

0.798906

1-sigma variation

Unit

Aphelion distance

Value

1.017522

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.000396

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.189045

1-sigma variation

Unit

MOID

Value

0.000368

1-sigma variation

Unit

Orbit Period

Value

316.1409

1-sigma variation

Unit

U parameter

Value

0.3

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	7.67485E-18	-7.90158E-17	-6.17880E-14	-2.28382E-14	5.30451E-14	3.72628E-14
e	-7.90158E-17	2.91420E-14	8.11696E-13	3.10926E-13	-1.34297E-11	1.55814E-11
i	-6.17880E-14	8.11696E-13	5.95162E-10	2.09473E-10	-5.54567E-10	-1.13310E-10
Ω	-2.28382E-14	3.10926E-13	2.09473E-10	1.34090E-10	-2.64484E-10	-4.02505E-11
ω	5.30451E-14	-1.34297E-11	-5.54567E-10	-2.64484E-10	6.49175E-9	-7.23340E-9
M	3.72628E-14	1.55814E-11	-1.13310E-10	-4.02505E-11	-7.23340E-9	9.64529E-9

Date of computation: 2026-10-07 14:31 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

22.69

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

80 - 170*

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

Unit

Source

[-]

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Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

6921

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.643949

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2007-10-17.44246

Unit

Source

[2]

Last Observation

Value

2026-09-28.064792

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

42 (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

Unit

Source

[-]

Last Observation

Value

Unit

Source

[-]

Delay (Discarded)

Value

0 (0)

Unit

Source

[-]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[-]

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

Filters

Initial Date: *

Final Date: *

Normalised Only accepted

Max residual (arcsec):

* - these fields are required

Plot

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Note: Ephemerides requests are limited to a maximum of 1000 points and a final date not exceeding 2040/12/31 00:00.

Close Approaches for 2007UW1 from 1950 to 2126

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1953-09-16 13:42	57.0	0.1484983	0.1477927	0.0002354
EARTH	1954-01-14 19:16	605.0	0.1902829	0.1900344	0.0000829
EARTH	1961-05-29 15:57	12.3	0.1468046	0.1467864	0.0000061
EARTH	1961-10-20 01:32	< 1 min	0.0046368	0.0046320	0.0000016
EARTH	1968-03-27 13:13	1.5	0.1987252	0.1987243	0.0000003
EARTH	1974-10-06 07:00	< 1 min	0.0850480	0.0850447	0.0000011
EARTH	1981-04-23 23:11	< 1 min	0.1816003	0.1815999	0.0000001
EARTH	1994-05-31 05:03	< 1 min	0.1661046	0.1661042	0.0000001
EARTH	1994-10-22 12:29	< 1 min	0.0540535	0.0540510	0.0000008
EARTH	2007-06-07 14:41	< 1 min	0.1660703	0.1660697	0.0000002
EARTH	2007-10-22 00:45	< 1 s	0.0345514	0.0345510	0.0000001
EARTH	2020-04-25 19:18	< 1 min	0.1858033	0.1858029	0.0000001
EARTH	2026-10-05 10:12	< 1 min	0.0847460	0.0847446	0.0000005
EARTH	2039-06-10 08:34	< 1 min	0.1675205	0.1675199	0.0000002
EARTH	2039-10-21 19:09	< 1 min	0.0310148	0.0310140	0.0000003
EARTH	2045-09-10 13:12	< 1 min	0.1727291	0.1727270	0.0000007
EARTH	2058-05-19 18:13	2.2	0.1774352	0.1774343	0.0000003
EARTH	2058-10-23 12:55	< 1 min	0.1153241	0.1153162	0.0000026
EARTH	2064-09-30 18:59	< 1 min	0.0980928	0.0980866	0.0000021
EARTH	2077-04-30 04:50	< 1 min	0.1858571	0.1858568	0.0000001
EARTH	2083-10-17 11:15	< 1 min	0.0158810	0.0158780	0.0000010
EARTH	2090-03-28 08:53	10.2	0.1970100	0.1970050	0.0000017
EARTH	2096-10-07 23:25	5.2	0.0703975	0.0703332	0.0000214
EARTH	2103-04-21 19:10	18.6	0.1830443	0.1830372	0.0000024
EARTH	2116-05-27 16:21	16.3	0.1689827	0.1689792	0.0000011
EARTH	2116-10-22 19:43	< 1 min	0.0766960	0.0766372	0.0000196

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
217.38647407	283.63934702	0.00036811	MINIMUM
341.28664921	47.75277636	0.21122214	SADDLE
6.99462152	256.38580017	1.80147342	SADDLE
189.04700033	78.49735759	2.01095879	MAXIMUM

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MOID Plots

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