Asteroids

2025QK9 help

Last update: 2025-08-28 15:00 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.976

Aphelion (Q)

3.488

Eccentricity (e)

0.563

Inclination (i)

1.3

deg

Orbit period (P)

1218.1

Earth MOID

0.00626

U parameter

8.7

Next Earth close approach

Date

2025-09-16

Nominal distance (from Earth center)

0.01065

1593610

Maximum Brightness

19.5

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

24.2

mag

Diameter

40 - 90*

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

2.232175

1-sigma variation

0.011298

Unit

Eccentricity (e)

Value

0.562778

1-sigma variation

0.002228

Unit

Inclination (i)

Value

1.2623

1-sigma variation

0.0038

Unit

Long. of Ascending Node (Ω)

Value

16.0377

1-sigma variation

0.4643

Unit

Arg. of Perihelion (ω)

Value

358.3319

1-sigma variation

0.4268

Unit

Mean Anomaly (M)

Value

14.40352

1-sigma variation

0.11476

Unit

Perihelion distance

Value

0.975956

1-sigma variation

Unit

Aphelion distance

Value

3.488394

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.023053

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

2.484661

1-sigma variation

Unit

MOID

Value

0.006258

1-sigma variation

Unit

Orbit Period

Value

1218.1224

1-sigma variation

Unit

U parameter

Value

8.7

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.27654E-4	2.51633E-5	1.24642E-5	2.59992E-3	-2.40220E-3	-1.28418E-3
e	2.51633E-5	4.96266E-6	2.63427E-6	4.92626E-4	-4.55290E-4	-2.52357E-4
i	1.24642E-5	2.63427E-6	1.41683E-5	-1.19746E-3	1.09704E-3	-6.82699E-5
Ω	2.59992E-3	4.92626E-4	-1.19746E-3	2.15609E-1	-1.98162E-1	-3.25570E-2
ω	-2.40220E-3	-4.55290E-4	1.09704E-3	-1.98162E-1	1.82129E-1	3.00397E-2
M	-1.28418E-3	-2.52357E-4	-6.82699E-5	-3.25570E-2	3.00397E-2	1.31707E-2

Date of computation: 2025-08-28 15:00 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

24.19

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

40 - 90*

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

0.190334

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-08-25.30791

Unit

Source

[2]

Last Observation

Value

2025-08-28.01144

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

14 (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

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 2025QK9 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	2005-11-11 09:24	> 1 w	0.0683098	0.0075628	0.1752806
EARTH	2015-10-12 03:49	> 1 mo	0.0258460	0.0120037	0.0872759
EARTH	2025-09-16 19:32	186.5	0.0106526	0.0102986	0.0001181
EARTH	2035-09-15 03:42	> 1 mo	0.0099541	0.0093260	0.0704194
EARTH	2045-10-14 13:47	> 1 mo	0.0226933	0.0103672	2.7829338
EARTH	2055-10-06 19:11	> 1 mo	0.0234465	0.0216645	0.4621741
MARS	2065-07-16 10:53	> 1 mo	0.0227481	0.0084726	5.6382676
EARTH	2065-10-12 22:44	> 1 mo	0.0261787	0.0134772	1.4064131
EARTH	2075-09-09 03:26	> 1 mo	0.0138199	0.0096568	8.9029943
EARTH	2118-11-11 15:18	> 1 mo	0.0601394	0.0088862	144.0318824

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
9.54881228	291.93041557	0.00625810	MINIMUM
347.64932625	250.88285707	0.00941048	MINIMUM
358.36947505	270.99880244	0.02415908	SADDLE
358.50602878	91.25750904	1.97731549	SADDLE
179.58201933	92.55971356	2.48683874	SADDLE
179.58348334	272.56092719	4.48825161	MAXIMUM

Download:

MOID Plots

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