Asteroids

2025QU4 help

Last update: 2025-08-24 23:15 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.561

Aphelion (Q)

2.135

Eccentricity (e)

0.584

Inclination (i)

9.8

deg

Orbit period (P)

571.8

Earth MOID

0.01191

U parameter

8.2

Next Earth close approach

Date

2055-02-01

Nominal distance (from Earth center)

0.07707

11528893

Maximum Brightness

23.8

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

25.7

mag

Diameter

19 - 40*

Taxonomic type

Rotation period (T)

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

1.348177

1-sigma variation

0.001561

Unit

Eccentricity (e)

Value

0.583716

1-sigma variation

0.000734

Unit

Inclination (i)

Value

9.8079

1-sigma variation

0.0142

Unit

Long. of Ascending Node (Ω)

Value

333.4360

1-sigma variation

0.0012

Unit

Arg. of Perihelion (ω)

Value

253.8663

1-sigma variation

0.0048

Unit

Mean Anomaly (M)

Value

92.34481

1-sigma variation

0.18376

Unit

Perihelion distance

Value

0.561224

1-sigma variation

Unit

Aphelion distance

Value

2.135130

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.049683

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.225308

1-sigma variation

Unit

MOID

Value

0.011911

1-sigma variation

Unit

Orbit Period

Value

571.7667

1-sigma variation

Unit

U parameter

Value

8.2

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.43586E-6	1.14544E-6	2.21300E-5	1.88030E-6	5.19608E-6	-2.86797E-4
e	1.14544E-6	5.39278E-7	1.04415E-5	8.84804E-7	2.35654E-6	-1.34872E-4
i	2.21300E-5	1.04415E-5	2.02994E-4	1.71111E-5	4.25113E-5	-2.60607E-3
Ω	1.88030E-6	8.84804E-7	1.71111E-5	1.45296E-6	3.92803E-6	-2.21394E-4
ω	5.19608E-6	2.35654E-6	4.25113E-5	3.92803E-6	2.27012E-5	-6.10557E-4
M	-2.86797E-4	-1.34872E-4	-2.60607E-3	-2.21394E-4	-6.10557E-4	3.37674E-2

Date of computation: 2025-08-24 23:15 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

25.73

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

19 - 40*

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

[-]

Download this part as:

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

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.720464

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-08-23.368751

Unit

Source

[2]

Last Observation

Value

2025-08-24.948215

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

22 (1)

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

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 2025QU4 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	1961-02-04 07:14	> 1 w	0.1250702	0.0750076	0.1833317
EARTH	1967-08-26 00:36	> 1 w	0.0693902	0.0146503	0.3396297
EARTH	1972-01-25 23:06	> 1 w	0.1100838	0.0728607	0.2548943
EARTH	1978-08-17 16:43	> 1 w	0.1038828	0.0133635	0.2922658
VENUS	1984-10-26 21:33	> 1 w	0.0486020	0.0481893	0.0305226
EARTH	2008-02-11 09:01	> 1 w	0.1941572	0.0791766	0.1588926
EARTH	2014-08-30 06:14	> 1 d	0.1572801	0.0114516	0.1120365
EARTH	2019-01-30 05:25	> 1 d	0.0703850	0.0703653	0.0009682
EARTH	2025-08-21 14:19	< 1 s	0.0280702	0.0279687	0.0000338
EARTH	2055-01-31 22:31	> 1 w	0.0746146	0.0692618	0.1042289
EARTH	2061-08-20 19:41	> 1 w	0.0475559	0.0103629	0.3127054
VENUS	2070-12-12 18:17	> 1 d	0.0454495	0.0454372	0.0025182
EARTH	2086-08-28 06:13	> 1 d	0.1035175	0.0090629	0.1021668
EARTH	2091-01-25 14:40	> 1 w	0.1200220	0.0680952	0.1202399
EARTH	2097-08-13 06:19	> 1 w	0.1915932	0.0037509	0.1908885
EARTH	2116-02-04 06:46	> 1 w	0.0889869	0.0675776	0.1498722
EARTH	2122-08-22 19:21	> 1 w	0.0396037	0.0076679	0.2097063

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
64.96013171	229.09930944	0.01191107	MINIMUM
299.01356362	27.91775018	0.07045863	MINIMUM
2.98178601	130.28189279	0.46739565	SADDLE
181.02084015	306.67701701	1.16926333	SADDLE
2.22988051	308.79723503	1.54654673	SADDLE
180.32975134	126.32766918	3.13674244	MAXIMUM

Download:

MOID Plots

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