Asteroids

2025HL help

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

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.777

Aphelion (Q)

2.839

Eccentricity (e)

0.570

Inclination (i)

5.2

deg

Orbit period (P)

888.2

Earth MOID

0.05574

U parameter

8.8

Next Earth close approach

Date

2029-11-17

Nominal distance (from Earth center)

0.09115

13635909

Maximum Brightness

20.4

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

22.6

mag

Diameter

80 - 180*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-04-18

Observatory

University of Arizona 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

1.808344

1-sigma variation

0.008348

Unit

Eccentricity (e)

Value

0.570102

1-sigma variation

0.002125

Unit

Inclination (i)

Value

5.1740

1-sigma variation

0.0106

Unit

Long. of Ascending Node (Ω)

Value

150.0981

1-sigma variation

0.0772

Unit

Arg. of Perihelion (ω)

Value

332.1860

1-sigma variation

0.1015

Unit

Mean Anomaly (M)

Value

192.35297

1-sigma variation

1.35979

Unit

Perihelion distance

Value

0.777403

1-sigma variation

Unit

Aphelion distance

Value

2.839284

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.176935

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

1.450286

1-sigma variation

Unit

MOID

Value

0.055737

1-sigma variation

Unit

Orbit Period

Value

888.2186

1-sigma variation

Unit

U parameter

Value

8.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	6.96845E-5	1.77358E-5	8.86783E-5	-6.43648E-4	8.45749E-4	-1.13511E-2
e	1.77358E-5	4.51418E-6	2.25727E-5	-1.63777E-4	2.15192E-4	-2.88904E-3
i	8.86783E-5	2.25727E-5	1.12911E-4	-8.18114E-4	1.07478E-3	-1.44450E-2
Ω	-6.43648E-4	-1.63777E-4	-8.18114E-4	5.96055E-3	-7.83548E-3	1.04846E-1
ω	8.45749E-4	2.15192E-4	1.07478E-3	-7.83548E-3	1.03011E-2	-1.37767E-1
M	-1.13511E-2	-2.88904E-3	-1.44450E-2	1.04846E-1	-1.37767E-1	1.84902E0

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

22.617

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

80 - 180*

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

397

Unit

Source

[1]

Normalized RMS of residuals

Value

0.482057

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-04-18.229457

Unit

Source

[2]

Last Observation

Value

2025-04-30.236291

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

33 (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 2025HL 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	1961-12-01 12:40	> 1 mo	0.1308481	0.0909765	3.4495518
EARTH	1978-11-25 07:24	> 1 mo	0.1062576	0.0887367	1.4606696
EARTH	1991-04-10 08:04	> 1 mo	0.1761697	0.0584571	1.6260433
EARTH	1995-11-19 18:06	> 1 mo	0.0887475	0.0883679	0.1119089
EARTH	2008-04-05 14:23	> 1 mo	0.1173160	0.0573126	0.6853936
EARTH	2012-11-16 07:09	> 1 mo	0.0932584	0.0888239	0.1555563
EARTH	2025-04-05 12:58	< 1 min	0.1147326	0.1136020	0.0003769
EARTH	2029-11-17 20:21	> 1 w	0.0911504	0.0889990	0.0444614
EARTH	2042-04-09 12:16	> 1 mo	0.1671364	0.0589464	0.7284389
EARTH	2046-11-22 20:59	> 1 mo	0.0925609	0.0891870	0.2443546
EARTH	2063-12-07 19:43	> 1 mo	0.1431054	0.0955115	1.2389084
EARTH	2080-12-31 00:01	> 1 mo	0.1959918	0.1470831	0.8405135

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
37.28428948	85.47772420	0.05609827	MINIMUM
322.98720743	316.43889674	0.08894618	MINIMUM
359.22980319	19.18349321	0.21059663	SADDLE
0.53324826	201.60352774	1.79396866	SADDLE
180.02986660	201.20882261	1.82362343	SADDLE
180.25075041	21.32067005	3.82325860	MAXIMUM

Download:

MOID Plots

Click on the images to zoom-in and zoom-out