Asteroids

2025HM4 help

Last update: 2025-05-03 00:31 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.624

Aphelion (Q)

2.630

Eccentricity (e)

0.617

Inclination (i)

2.8

deg

Orbit period (P)

758.0

Earth MOID

0.00224

U parameter

8.0

Next Earth close approach

Date

2031-10-30

Nominal distance (from Earth center)

0.05324

7965103

Maximum Brightness

mag

Risk

Object is in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

26.2

mag

Diameter

16 - 30*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-04-25

Observatory

Pan-STARRS 2, Haleakala

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

1.626916

1-sigma variation

0.001714

Unit

Eccentricity (e)

Value

0.616708

1-sigma variation

0.000518

Unit

Inclination (i)

Value

2.8057

1-sigma variation

0.0021

Unit

Long. of Ascending Node (Ω)

Value

223.3346

1-sigma variation

0.0005

Unit

Arg. of Perihelion (ω)

Value

87.3766

1-sigma variation

0.0023

Unit

Mean Anomaly (M)

Value

337.82951

1-sigma variation

0.04465

Unit

Perihelion distance

Value

0.623585

1-sigma variation

Unit

Aphelion distance

Value

2.630247

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.028261

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.046684

1-sigma variation

Unit

MOID

Value

0.002244

1-sigma variation

Unit

Orbit Period

Value

757.9597

1-sigma variation

Unit

U parameter

Value

8.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.93715E-6	8.88285E-7	3.51912E-6	8.57098E-7	-3.85563E-6	7.65178E-5
e	8.88285E-7	2.68646E-7	1.06433E-6	2.59106E-7	-1.16569E-6	2.31414E-5
i	3.51912E-6	1.06433E-6	4.21901E-6	1.02030E-6	-4.60707E-6	9.16796E-5
Ω	8.57098E-7	2.59106E-7	1.02030E-6	2.67843E-7	-1.15940E-6	2.23275E-5
ω	-3.85563E-6	-1.16569E-6	-4.60707E-6	-1.15940E-6	5.15453E-6	-1.00442E-4
M	7.65178E-5	2.31414E-5	9.16796E-5	2.23275E-5	-1.00442E-4	1.99342E-3

Date of computation: 2025-05-01 12:30 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

26.157

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

16 - 30*

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

0.594953

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-04-25.399307

Unit

Source

[2]

Last Observation

Value

2025-04-30.088017

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

29 (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 2025HM4 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	1962-10-29 17:12	> 1 d	0.0373888	0.0051127	0.0762866
EARTH	1979-04-20 20:16	> 1 w	0.1987713	0.0046054	0.2328504
EARTH	1985-11-05 19:57	> 1 w	0.0932587	0.0045930	0.3340130
EARTH	2002-04-28 00:02	> 1 w	0.0580765	0.0030446	0.3260260
EARTH	2025-04-30 23:54	< 1 min	0.0051287	0.0051160	0.0000042
EARTH	2031-10-30 05:27	> 1 d	0.0532434	0.0030686	0.0608427
EARTH	2054-05-11 20:47	> 1 w	0.1444889	0.0028356	0.1127716
VENUS	2058-07-31 20:21	> 1 w	0.0338421	0.0229920	0.0866045
EARTH	2060-11-06 05:02	> 1 d	0.0823181	0.0021081	0.1103182
VENUS	2075-03-09 18:53	1210.6	0.0242052	0.0237285	0.0020569
EARTH	2081-05-03 23:01	559.0	0.0369746	0.0264245	0.0035379
EARTH	2087-11-07 00:04	1173.5	0.0784925	0.0338193	0.0149153
EARTH	2106-04-23 03:03	> 1 d	0.1942774	0.1380473	0.0187450
EARTH	2112-10-25 05:46	> 1 d	0.1333509	0.0587038	0.0248885
VENUS	2118-11-10 04:02	> 1 d	0.0450522	0.0243582	0.0264787

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
308.13095125	117.72361334	0.00224397	MINIMUM
50.78752168	297.85668325	0.00350268	MINIMUM
359.13553875	207.39381499	0.39271525	SADDLE
359.13882122	27.38020156	1.60864451	SADDLE
179.79380319	28.20340809	1.64655606	SADDLE
179.77983434	208.19181638	3.64369569	MAXIMUM

Download:

MOID Plots

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

Level lines of the squared distance function

2025HM4

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS
2083-05-03.081	81982.081	-0.926	0.54 ± 0.001	2.96E7	1.82E-8	1.27E-8	-8.11
2090-05-02.633	84538.633	4.101	0.68 ± 0.002	4.85E5	3.60E-10	2.59E-10	-9.86
2092-05-02.122	85269.122	0.944	0.52 ± 0.002	1.58E6	3.74E-7	2.64E-7	-6.86
2095-11-04.875	86550.875	1.331	0.46 ± 0.006	1.72E7	2.14E-8	1.51E-8	-8.12
2096-05-02.019	86730.019	3.908	1.07 ± 0.002	2.18E6	8.61E-11	6.18E-11	-10.51
2097-11-04.193	87281.193	0.145	0.99 ± 0.009	5.71E6	9.31E-8	6.55E-8	-7.49
2102-05-03.176	88921.176	-0.064	1.13 ± 0.006	9.62E6	9.00E-8	6.33E-8	-7.54
2102-05-03.188	88921.188	1.848	1.13 ± 0.002	5.31E5	8.52E-8	6.05E-8	-7.56
2102-05-03.194	88921.194	-0.830	0.73 ± 0.000	3.79E7	1.45E-8	1.02E-8	-8.33
2102-05-03.269	88921.269	1.770	0.96 ± 0.002	4.71E4	3.74E-6	2.65E-6	-5.92
2102-05-03.408	88921.408	1.159	0.14 ± 0.002	3.70E4	1.27E-5	8.99E-6	-5.39
2104-05-02.525	89651.525	0.989	0.65 ± 0.000	4.56E7	1.08E-8	7.61E-9	-8.47
2104-05-02.732	89651.732	-0.062	0.35 ± 0.003	3.58E6	2.47E-7	1.73E-7	-7.11
2104-05-02.855	89651.855	0.642	0.16 ± 0.000	2.97E7	2.52E-8	1.77E-8	-8.10
2105-05-03.020	90017.020	-2.358	0.69 ± 0.002	1.74E7	2.68E-9	1.86E-9	-9.08
2106-05-03.149	90382.149	1.858	0.97 ± 0.002	2.00E6	4.54E-8	3.22E-8	-7.85
2106-05-03.211	90382.211	2.108	0.95 ± 0.002	1.57E6	4.99E-8	3.55E-8	-7.81
2106-05-03.235	90382.235	1.104	0.63 ± 0.002	2.43E6	1.74E-7	1.23E-7	-7.27
2106-05-03.265	90382.265	0.100	0.27 ± 0.002	1.82E5	4.99E-6	3.51E-6	-5.82
2106-05-03.301	90382.301	1.661	0.75 ± 0.002	5.68E5	3.14E-7	2.23E-7	-7.01
2106-05-03.352	90382.352	1.361	0.99 ± 0.003	3.14E5	1.17E-6	8.26E-7	-6.44
2106-05-03.383	90382.383	-0.794	1.09 ± 0.002	5.36E5	4.58E-7	3.20E-7	-6.86
2106-05-03.408	90382.408	-2.312	0.98 ± 0.002	7.88E5	4.57E-8	3.16E-8	-7.86
2108-05-02.831	91112.831	-2.306	0.11 ± 0.000	2.30E6	2.82E-8	1.96E-8	-8.08
2110-05-02.840	91842.840	1.875	0.20 ± 0.000	2.46E7	6.49E-9	4.61E-9	-8.72
2110-05-03.175	91843.175	0.440	0.61 ± 0.002	6.54E4	1.15E-5	8.10E-6	-5.47
2111-05-03.235	92208.235	2.251	0.83 ± 0.002	1.08E7	5.51E-9	3.92E-9	-8.79
2111-05-03.439	92208.439	-0.890	0.22 ± 0.003	1.26E7	4.87E-8	3.40E-8	-7.85
2111-05-03.439	92208.439	-0.892	0.25 ± 0.002	9.70E6	6.30E-8	4.40E-8	-7.74
2112-05-02.627	92573.627	2.102	1.07 ± 0.003	2.45E7	3.87E-9	2.75E-9	-8.95
2114-05-03.083	93304.083	-2.279	0.75 ± 0.002	5.38E5	9.82E-8	6.80E-8	-7.57
2116-05-02.540	94034.540	-0.421	0.78 ± 0.003	2.09E7	3.03E-8	2.12E-8	-8.08
2116-05-02.558	94034.558	-0.423	1.12 ± 0.003	2.19E7	1.07E-8	7.54E-9	-8.53
2116-05-02.587	94034.587	-0.735	0.75 ± 0.002	9.67E6	5.61E-8	3.93E-8	-7.82
2116-05-02.663	94034.663	-0.506	1.15 ± 0.002	2.47E6	3.21E-7	2.25E-7	-7.06
2117-05-03.020	94400.020	-3.908	1.07 ± 0.003	9.17E6	4.42E-11	3.03E-11	-10.93
2118-05-03.074	94765.074	-1.049	0.88 ± 0.003	6.32E7	5.56E-9	3.88E-9	-8.83
2118-05-03.188	94765.188	0.667	0.90 ± 0.002	5.38E6	8.74E-8	6.16E-8	-7.63
2119-05-03.533	95130.533	2.336	0.52 ± 0.002	4.71E5	1.25E-7	8.92E-8	-7.47
2119-05-03.536	95130.536	2.332	0.16 ± 0.002	5.44E5	1.11E-7	7.93E-8	-7.53
2120-05-02.435	95495.435	0.771	1.01 ± 0.002	5.21E6	6.57E-8	4.64E-8	-7.76
2120-05-02.480	95495.480	0.627	0.91 ± 0.002	2.65E7	1.79E-8	1.26E-8	-8.33
2122-05-02.760	96225.760	-0.452	0.81 ± 0.000	4.61E7	1.76E-8	1.23E-8	-8.34
2122-05-02.863	96225.863	-1.834	0.57 ± 0.002	4.46E5	3.38E-7	2.35E-7	-7.07
2122-11-04.790	96411.790	0.160	1.00 ± 0.009	8.80E6	5.34E-8	3.76E-8	-7.86
2122-11-04.805	96411.805	-0.072	0.69 ± 0.011	4.77E7	1.59E-8	1.12E-8	-8.39
2124-05-02.316	96956.316	-0.748	0.89 ± 0.003	1.32E6	3.41E-7	2.38E-7	-7.07
2124-05-02.392	96956.392	-0.469	0.66 ± 0.002	7.33E5	9.65E-7	6.75E-7	-6.62


Based on 29 optical observations (of which 0 are rejected as outliers) from 2025/04/25.399 to 2025/04/30.088.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.16 and 1.16 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20250501 132537.744 UTC.

Download this part as:

Download Impactor Table as: