Asteroids

2025HM15 help

Last update: 2025-09-10 00:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.831

Aphelion (Q)

4.239

Eccentricity (e)

0.672

Inclination (i)

8.5

deg

Orbit period (P)

1474.5

Earth MOID

0.01833

U parameter

7.6

Next Earth close approach

Date

2029-06-25

Nominal distance (from Earth center)

0.14959

22378623

Maximum Brightness

24.2

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

22.3

mag

Diameter

90 - 210*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-04-28

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

2.535255

1-sigma variation

0.003143

Unit

Eccentricity (e)

Value

0.672031

1-sigma variation

0.000424

Unit

Inclination (i)

Value

8.4890

1-sigma variation

0.0031

Unit

Long. of Ascending Node (Ω)

Value

73.9369

1-sigma variation

0.0032

Unit

Arg. of Perihelion (ω)

Value

229.1229

1-sigma variation

0.0048

Unit

Mean Anomaly (M)

Value

34.97582

1-sigma variation

0.06283

Unit

Perihelion distance

Value

0.831486

1-sigma variation

Unit

Aphelion distance

Value

4.239024

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

1.495495

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.050433

1-sigma variation

Unit

MOID

Value

0.018333

1-sigma variation

Unit

Orbit Period

Value

1474.4529

1-sigma variation

Unit

U parameter

Value

7.6

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	9.87832E-6	1.33275E-6	9.65070E-6	1.01865E-5	-1.49911E-5	-1.97466E-4
e	1.33275E-6	1.79809E-7	1.30205E-6	1.37430E-6	-2.02243E-6	-2.66413E-5
i	9.65070E-6	1.30205E-6	9.42965E-6	9.94882E-6	-1.46376E-5	-1.92916E-4
Ω	1.01865E-5	1.37430E-6	9.94882E-6	1.05118E-5	-1.54766E-5	-2.03626E-4
ω	-1.49911E-5	-2.02243E-6	-1.46376E-5	-1.54766E-5	2.28049E-5	2.99666E-4
M	-1.97466E-4	-2.66413E-5	-1.92916E-4	-2.03626E-4	2.99666E-4	3.94730E-3

Date of computation: 2025-09-10 00:30 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

22.301

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

90 - 210*

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

128

Unit

Source

[1]

Normalized RMS of residuals

Value

0.516255

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-04-28.430347

Unit

Source

[2]

Last Observation

Value

2025-05-21.48806

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

67 (2)

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 2025HM15 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	1969-09-16 11:37	> 1 w	0.1944507	0.1526476	0.1140755
EARTH	1977-05-12 10:44	> 1 w	0.0991839	0.0598357	0.2717187
EARTH	2025-05-21 22:26	< 1 min	0.0847445	0.0846193	0.0000417
EARTH	2029-06-25 23:23	> 1 w	0.1495919	0.0742445	0.0269686
EARTH	2033-08-31 02:34	> 1 w	0.1801799	0.1529524	0.0321012
EARTH	2094-06-05 03:35	> 1 mo	0.0442664	0.0110232	0.2962655
EARTH	2102-09-16 12:08	> 1 mo	0.1510381	0.1420947	0.0784767

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
333.76140143	144.80971302	0.01770100	MINIMUM
26.21924330	257.37191095	0.14400471	MINIMUM
3.12429810	208.10177781	0.21283412	SADDLE
359.93937206	20.75012031	1.81336740	SADDLE
180.12354667	20.47047666	3.26578558	SADDLE
179.78211493	200.31729502	5.25258516	MAXIMUM

Download:

MOID Plots

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