Asteroids

2025UP9 help

Last update: 2026-03-17 23:26 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.752

Aphelion (Q)

2.123

Eccentricity (e)

0.477

Inclination (i)

1.8

deg

Orbit period (P)

629.5

Earth MOID

0.00900

U parameter

8.4

Next Earth close approach

Date

2031-04-26

Nominal distance (from Earth center)

0.18791

28110192

Maximum Brightness

23.7

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

24.4

mag

Diameter

30 - 80*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-10-28

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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.437498

1-sigma variation

0.002478

Unit

Eccentricity (e)

Value

0.476533

1-sigma variation

0.001133

Unit

Inclination (i)

Value

1.7533

1-sigma variation

0.0047

Unit

Long. of Ascending Node (Ω)

Value

187.2703

1-sigma variation

0.0290

Unit

Arg. of Perihelion (ω)

Value

300.3118

1-sigma variation

0.0325

Unit

Mean Anomaly (M)

Value

90.66719

1-sigma variation

0.21040

Unit

Perihelion distance

Value

0.752482

1-sigma variation

Unit

Aphelion distance

Value

2.122514

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.101770

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.459808

1-sigma variation

Unit

MOID

Value

0.009000

1-sigma variation

Unit

Orbit Period

Value

629.5196

1-sigma variation

Unit

U parameter

Value

8.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	6.13827E-6	2.80623E-6	1.15707E-5	7.18424E-5	-8.05957E-5	-5.21284E-4
e	2.80623E-6	1.28292E-6	5.28976E-6	3.28435E-5	-3.68448E-5	-2.38315E-4
i	1.15707E-5	5.28976E-6	2.18117E-5	1.35441E-4	-1.51945E-4	-9.82629E-4
Ω	7.18424E-5	3.28435E-5	1.35441E-4	8.41258E-4	-9.43828E-4	-6.10110E-3
ω	-8.05957E-5	-3.68448E-5	-1.51945E-4	-9.43828E-4	1.05896E-3	6.84445E-3
M	-5.21284E-4	-2.38315E-4	-9.82629E-4	-6.10110E-3	6.84445E-3	4.42694E-2

Date of computation: 2026-03-17 23:26 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

24.405

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

30 - 80*

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

141

Unit

Source

[1]

Normalized RMS of residuals

Value

0.48491

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-10-28.329269

Unit

Source

[2]

Last Observation

Value

2025-11-11.529191

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

38 (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

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 2025UP9 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	1950-03-20 16:40	> 1 mo	0.1554793	0.0172489	2.6490916
EARTH	1956-11-06 07:56	> 1 mo	0.1156529	0.0198666	2.1114340
EARTH	1962-04-14 16:39	> 1 w	0.0101965	0.0082573	0.1998458
EARTH	1968-12-24 17:49	> 1 mo	0.1955299	0.0244124	0.1602161
EARTH	1981-04-06 09:35	> 1 w	0.0777278	0.0090065	0.1956549
EARTH	1987-12-06 10:46	> 1 w	0.1464853	0.0680677	0.0263511
EARTH	2000-03-17 21:34	> 1 mo	0.1620315	0.0190130	0.1962499
EARTH	2006-11-19 00:13	> 1 mo	0.0511491	0.0210621	0.3783347
EARTH	2025-11-11 23:24	< 1 min	0.0462180	0.0459044	0.0001045
EARTH	2031-04-26 17:53	> 1 d	0.1879050	0.0103442	0.0795586
EARTH	2044-11-03 04:11	> 1 w	0.1922554	0.0211133	0.2401836
EARTH	2050-04-19 20:38	> 1 w	0.0705974	0.0095242	0.2603689
EARTH	2069-04-18 15:05	> 1 d	0.0520518	0.0095740	0.0999251
EARTH	2088-04-20 13:07	> 1 w	0.0833650	0.0098853	0.1622736
EARTH	2101-11-09 16:11	1119.4	0.1137477	0.0722790	0.0139615
EARTH	2120-11-11 23:40	> 1 w	0.0753910	0.0222512	0.2308680

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
50.71628391	102.34372818	0.00915278	MINIMUM
310.77167093	311.83841438	0.02143587	MINIMUM
0.91070808	27.21526265	0.23401451	SADDLE
180.35333526	206.70272668	1.10748415	SADDLE
1.11595014	207.53489492	1.76855610	SADDLE
180.39519413	26.72129318	3.10822726	MAXIMUM

Download:

MOID Plots

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