Asteroids

2025QX9 help

Last update: 2026-06-04 23:11 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.916

Aphelion (Q)

1.183

Eccentricity (e)

0.128

Inclination (i)

3.6

deg

Orbit period (P)

392.6

Earth MOID

0.00652

U parameter

7.0

Next Earth close approach

Date

2039-09-10

Nominal distance (from Earth center)

0.10914

16327657

Maximum Brightness

24.7

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.6

mag

Diameter

13 - 28*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-08-27

Observatory

Pan-STARRS 1, Haleakala

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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.049366

1-sigma variation

0.000139

Unit

Eccentricity (e)

Value

0.127533

1-sigma variation

0.000263

Unit

Inclination (i)

Value

3.6292

1-sigma variation

0.0147

Unit

Long. of Ascending Node (Ω)

Value

137.2542

1-sigma variation

0.0239

Unit

Arg. of Perihelion (ω)

Value

297.9972

1-sigma variation

0.0191

Unit

Mean Anomaly (M)

Value

174.61537

1-sigma variation

0.04200

Unit

Perihelion distance

Value

0.915538

1-sigma variation

Unit

Aphelion distance

Value

1.183194

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.012110

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.083952

1-sigma variation

Unit

MOID

Value

0.006520

1-sigma variation

Unit

Orbit Period

Value

392.6348

1-sigma variation

Unit

U parameter

Value

7.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.92447E-8	3.58557E-8	1.42012E-6	1.33911E-6	-1.28344E-6	-3.22982E-6
e	3.58557E-8	6.91343E-8	3.15306E-6	3.53886E-6	-1.58623E-6	-7.68732E-6
i	1.42012E-6	3.15306E-6	2.17421E-4	3.31123E-4	8.25455E-5	-6.09246E-4
Ω	1.33911E-6	3.53886E-6	3.31123E-4	5.72538E-4	2.75781E-4	-9.89699E-4
ω	-1.28344E-6	-1.58623E-6	8.25455E-5	2.75781E-4	3.66012E-4	-3.68525E-4
M	-3.22982E-6	-7.68732E-6	-6.09246E-4	-9.89699E-4	-3.68525E-4	1.76372E-3

Date of computation: 2026-06-04 23:11 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

26.625

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

13 - 28*

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

Unit

Source

[1]

Unobserved

Value

319

Unit

Source

[1]

Normalized RMS of residuals

Value

0.568701

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-08-27.38563

Unit

Source

[2]

Last Observation

Value

2025-08-29.21103

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

11 (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 2025QX9 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	1957-07-19 08:50	> 1 w	0.1583629	0.0613885	0.0978236
EARTH	1958-02-08 22:56	> 1 mo	0.0219651	0.0070833	0.3592620
EARTH	1970-09-16 18:54	> 1 d	0.0470859	0.0409711	0.0158247
EARTH	1971-05-02 21:35	> 1 w	0.1704894	0.1460304	0.0082454
EARTH	1983-09-12 02:36	> 1 d	0.1640644	0.0393384	0.2063782
EARTH	1984-06-15 16:11	> 1 mo	0.1818307	0.1631389	0.0233991
EARTH	1985-02-20 22:09	> 1 w	0.0915233	0.0094568	0.2298674
EARTH	1997-07-13 18:25	> 1 d	0.1595530	0.1464533	0.0043689
EARTH	1998-02-08 06:26	> 1 d	0.0223991	0.0072713	0.0150405
EARTH	2011-07-19 12:30	> 1 w	0.1464230	0.1292954	0.0060239
EARTH	2012-01-19 11:59	> 1 w	0.0600079	0.0269166	0.0131090
EARTH	2025-09-12 08:14	36.1	0.0453365	0.0448267	0.0001699
EARTH	2026-05-04 02:55	297.9	0.1695479	0.1682419	0.0004354
EARTH	2039-09-10 06:53	751.0	0.1091436	0.0640325	0.0158658
EARTH	2040-06-05 08:38	> 1 w	0.1788741	0.1761564	0.0009857
EARTH	2041-02-20 04:03	1279.8	0.0998508	0.0519200	0.0160395
EARTH	2054-07-04 11:22	> 1 w	0.1620471	0.1550955	0.0023797
EARTH	2055-02-08 23:58	> 1 d	0.0169066	0.0066591	0.0096893
EARTH	2069-09-08 23:54	607.5	0.0348220	0.0341674	0.0396976
EARTH	2070-05-14 10:54	> 1 mo	0.1710303	0.1528955	0.0158678
EARTH	2071-02-23 01:33	> 1 w	0.1510401	0.0138911	0.5444211
EARTH	2085-07-29 01:00	> 1 mo	0.1217749	0.0762700	1.5419341
EARTH	2085-12-05 17:04	> 1 mo	0.0904387	0.0788711	0.4796452
EARTH	2086-03-30 10:08	> 1 mo	0.1309885	0.0326108	1.6799580
EARTH	2100-09-04 02:54	> 1 mo	0.1569138	0.0326219	1.7526774
EARTH	2101-06-23 11:20	> 1 mo	0.1642883	0.1360080	0.3056172
EARTH	2102-02-10 10:46	> 1 mo	0.0120872	0.0074535	1.2281778
EARTH	2118-09-04 19:55	> 1 mo	0.0294530	0.0291720	2.6579771
EARTH	2119-05-25 15:58	> 1 mo	0.1664391	0.1468969	2.3881829
EARTH	2120-02-17 23:00	> 1 mo	0.0532043	0.0111625	49.6148018

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
60.66568775	40.71240474	0.00692295	MINIMUM
281.60475452	249.28098480	0.03788534	MINIMUM
348.05706631	321.23690487	0.09020989	SADDLE
172.80512499	147.35653930	0.17934801	SADDLE
355.30693141	149.37229737	1.93093734	SADDLE
177.23764365	331.32456220	2.16845123	MAXIMUM

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MOID Plots

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