Asteroids

2025UL17 help

Last update: 2025-11-24 19:20 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.694

Aphelion (Q)

1.162

Eccentricity (e)

0.253

Inclination (i)

10.4

deg

Orbit period (P)

326.4

Earth MOID

0.01247

U parameter

6.5

Next Earth close approach

Date

2041-06-13

Nominal distance (from Earth center)

0.15386

23016809

Maximum Brightness

26.1

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

27 - 60*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-10-31

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.927851

1-sigma variation

0.000045

Unit

Eccentricity (e)

Value

0.252523

1-sigma variation

0.000429

Unit

Inclination (i)

Value

10.4196

1-sigma variation

0.0212

Unit

Long. of Ascending Node (Ω)

Value

49.7165

1-sigma variation

0.0041

Unit

Arg. of Perihelion (ω)

Value

114.2433

1-sigma variation

0.0141

Unit

Mean Anomaly (M)

Value

284.11394

1-sigma variation

0.06065

Unit

Perihelion distance

Value

0.693547

1-sigma variation

Unit

Aphelion distance

Value

1.162155

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.020680

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.224386

1-sigma variation

Unit

MOID

Value

0.012475

1-sigma variation

Unit

Orbit Period

Value

326.4493

1-sigma variation

Unit

U parameter

Value

6.5

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.03165E-9	1.20174E-8	5.42719E-7	1.54766E-7	-6.34100E-7	1.97654E-6
e	1.20174E-8	1.83731E-7	9.05439E-6	1.56050E-7	-3.46136E-6	2.57543E-5
i	5.42719E-7	9.05439E-6	4.48234E-4	1.85871E-6	-1.54304E-4	1.25760E-3
Ω	1.54766E-7	1.56050E-7	1.85871E-6	1.70640E-5	-5.03705E-5	5.57248E-5
ω	-6.34100E-7	-3.46136E-6	-1.54304E-4	-5.03705E-5	1.98742E-4	-5.80745E-4
M	1.97654E-6	2.57543E-5	1.25760E-3	5.57248E-5	-5.80745E-4	3.67855E-3

Date of computation: 2025-11-24 19:20 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

24.975

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

27 - 60*

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

0.376659

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-10-31.40851

Unit

Source

[2]

Last Observation

Value

2025-11-02.422019

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

18 (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 2025UL17 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	1956-06-24 02:22	808.6	0.1374279	0.1365452	0.0005180
EARTH	1957-11-08 01:55	204.0	0.0369798	0.0228103	0.0050235
EARTH	1973-06-22 20:06	668.9	0.1374976	0.1368820	0.0002080
EARTH	1974-11-07 09:42	263.8	0.0683747	0.0495879	0.0063211
EARTH	1982-10-21 15:44	> 1 d	0.1715157	0.1553997	0.0053934
EARTH	1990-06-02 07:06	> 1 d	0.1763047	0.1704432	0.0020878
VENUS	1993-11-25 10:17	497.3	0.0412636	0.0313866	0.0035104
EARTH	1999-11-06 20:16	233.2	0.1047262	0.0989796	0.0019163
VENUS	2003-09-30 04:19	633.8	0.0496335	0.0311231	0.0065900
EARTH	2007-06-06 22:52	> 1 d	0.1656968	0.1580780	0.0028048
EARTH	2008-11-04 07:23	256.6	0.1559495	0.1401873	0.0052557
EARTH	2024-06-26 21:02	270.9	0.1437584	0.1429363	0.0003060
EARTH	2025-11-08 23:18	2.4	0.0150819	0.0149920	0.0000300
EARTH	2041-06-13 09:42	1383.3	0.1538579	0.1493405	0.0017336
EARTH	2042-11-05 05:22	296.1	0.1468122	0.1275041	0.0064394
EARTH	2050-11-04 23:03	805.6	0.1171648	0.1026796	0.0048287
VENUS	2052-12-14 08:31	682.5	0.0215408	0.0205829	0.0010041
EARTH	2058-06-01 02:38	> 1 d	0.1813988	0.1639490	0.0075676
EARTH	2059-11-03 23:33	1056.5	0.1960599	0.1320495	0.0213497
VENUS	2062-10-20 09:39	> 1 d	0.0339649	0.0196163	0.0251488
EARTH	2067-10-20 17:32	> 1 d	0.1765091	0.1493620	0.0091909
EARTH	2075-06-26 20:28	> 1 d	0.1435299	0.1406935	0.0021497
EARTH	2076-11-09 03:39	502.8	0.0191184	0.0085037	0.0133640
EARTH	2092-06-19 20:15	> 1 w	0.1459050	0.1428325	0.0127178
EARTH	2093-11-07 11:55	> 1 d	0.0950405	0.0090019	0.0721426
EARTH	2101-10-26 11:25	> 1 w	0.1597957	0.0417833	0.0508182
VENUS	2102-03-07 23:37	> 1 d	0.0498016	0.0165441	0.0706485
EARTH	2109-06-12 07:01	> 1 d	0.1618561	0.1506180	0.0099613
EARTH	2110-11-07 07:34	> 1 d	0.1435002	0.0043043	0.0467020
EARTH	2118-10-15 07:24	> 1 w	0.1915542	0.0845665	0.0450725

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
256.36037221	306.07387439	0.01247475	MINIMUM
94.18820377	170.64877020	0.14129847	MINIMUM
169.90554530	235.83149635	0.23957329	SADDLE
356.80019253	57.60568242	0.32959254	SADDLE
3.27780013	245.96351992	1.69629406	SADDLE
184.41558777	67.24981226	2.14845633	MAXIMUM

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MOID Plots

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