Asteroids

2025HM help

Last update: 2025-05-15 00:03 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.932

Aphelion (Q)

1.199

Eccentricity (e)

0.126

Inclination (i)

21.5

deg

Orbit period (P)

401.8

Earth MOID

0.03299

U parameter

6.7

Next Earth close approach

Date

2036-04-23

Nominal distance (from Earth center)

0.03809

5698354

Maximum Brightness

17.1

mag

Risk

Object is not in risk list

Object is not in priority 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

Catalina Sky 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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.065564

1-sigma variation

0.000095

Unit

Eccentricity (e)

Value

0.125592

1-sigma variation

0.000053

Unit

Inclination (i)

Value

21.4584

1-sigma variation

0.0083

Unit

Long. of Ascending Node (Ω)

Value

34.8418

1-sigma variation

0.0005

Unit

Arg. of Perihelion (ω)

Value

93.6032

1-sigma variation

0.0272

Unit

Mean Anomaly (M)

Value

79.71665

1-sigma variation

0.03311

Unit

Perihelion distance

Value

0.931738

1-sigma variation

Unit

Aphelion distance

Value

1.199390

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.063646

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.034508

1-sigma variation

Unit

MOID

Value

0.032988

1-sigma variation

Unit

Orbit Period

Value

401.7610

1-sigma variation

Unit

U parameter

Value

6.7

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	8.98101E-9	5.01743E-9	7.88582E-7	-4.97229E-8	2.57963E-6	-3.13752E-6
e	5.01743E-9	2.80327E-9	4.40572E-7	-2.77801E-8	1.44112E-6	-1.75282E-6
i	7.88582E-7	4.40572E-7	6.92434E-5	-4.36608E-6	2.26502E-4	-2.75490E-4
Ω	-4.97229E-8	-2.77801E-8	-4.36608E-6	2.75302E-7	-1.42816E-5	1.73705E-5
ω	2.57963E-6	1.44112E-6	2.26502E-4	-1.42816E-5	7.40958E-4	-9.01197E-4
M	-3.13752E-6	-1.75282E-6	-2.75490E-4	1.73705E-5	-9.01197E-4	1.09609E-3

Date of computation: 2025-05-15 00:03 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

22.634

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

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

[-]

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Sources

No.	Name	Additional
No.[1]	NameESA Aegis	AdditionalESA orbit determination and impact monitoring system
No.[2]	NameEstimation	AdditionalEstimated 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

0.461759

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-04-18.385055

Unit

Source

[2]

Last Observation

Value

2025-05-03.855658

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

281 (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 2025HM 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	1957-10-30 13:55	177.1	0.0781825	0.0596348	0.0110592
EARTH	1958-04-22 12:28	52.8	0.1337131	0.0850386	0.0166227
EARTH	1968-10-30 12:21	13.9	0.0594456	0.0587347	0.0017196
EARTH	1969-04-22 07:12	48.1	0.1764612	0.1429860	0.0112389
EARTH	1979-10-31 03:57	100.8	0.0723118	0.0591088	0.0075401
EARTH	1990-10-30 02:27	276.8	0.1418687	0.1020846	0.0139234
EARTH	2003-04-28 10:56	492.6	0.1800727	0.1394603	0.0136077
EARTH	2014-04-25 15:39	293.8	0.0858231	0.0619177	0.0082643
EARTH	2025-04-24 03:27	< 1 s	0.0387608	0.0387150	0.0000153
EARTH	2036-04-23 20:52	250.6	0.0380911	0.0331658	0.0043994
EARTH	2047-04-25 19:01	873.4	0.0804336	0.0335393	0.0241705
EARTH	2058-04-28 02:18	1148.2	0.1727691	0.0824423	0.0307972
EARTH	2067-10-30 12:37	537.7	0.1772057	0.0995534	0.0279424
EARTH	2078-10-31 06:58	166.7	0.0938405	0.0638992	0.0162444
EARTH	2089-10-31 04:10	33.3	0.0630617	0.0628381	0.0008575
EARTH	2090-04-22 11:56	44.3	0.1853279	0.1587285	0.0089002
EARTH	2100-10-31 16:41	55.8	0.0752696	0.0689464	0.0024854
EARTH	2101-04-23 07:21	13.8	0.1398147	0.1286973	0.0037161
EARTH	2111-10-31 21:38	13.1	0.1081448	0.1077698	0.0001251
EARTH	2112-04-23 09:47	17.3	0.0939324	0.0909463	0.0009984
EARTH	2122-10-30 22:54	159.5	0.1407319	0.1287988	0.0040313
EARTH	2123-04-24 15:05	111.6	0.0589419	0.0459091	0.0046831

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
77.76649015	110.37800455	0.03298813	MINIMUM
276.43632752	296.02866482	0.06062348	MINIMUM
357.08206842	22.51260156	0.36068557	SADDLE
176.94327912	203.92660744	0.45023591	SADDLE
1.04054366	207.24193758	1.91246860	SADDLE
190.48331871	36.87040467	2.14809317	MAXIMUM

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MOID Plots

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