Asteroids

2025HT6 help

Last update: 2026-07-30 14:25 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.898

Aphelion (Q)

1.899

Eccentricity (e)

0.358

Inclination (i)

1.0

deg

Orbit period (P)

604.1

Earth MOID

0.00253

U parameter

4.9

Next Earth close approach

Date

2030-01-05

Nominal distance (from Earth center)

0.03067

4588812

Maximum Brightness

20.8

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

23.4

mag

Diameter

60 - 130*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-04-27

Observatory

MAPS, San Pedro de Atacama

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

1.398513

1-sigma variation

0.000014

Unit

Eccentricity (e)

Value

0.357546

1-sigma variation

0.000008

Unit

Inclination (i)

Value

0.9875

1-sigma variation

1.660E-5

Unit

Long. of Ascending Node (Ω)

Value

107.0609

1-sigma variation

0.0005

Unit

Arg. of Perihelion (ω)

Value

39.0685

1-sigma variation

0.0005

Unit

Mean Anomaly (M)

Value

281.51891

1-sigma variation

0.00425

Unit

Perihelion distance

Value

0.898481

1-sigma variation

Unit

Aphelion distance

Value

1.898546

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.028435

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.670423

1-sigma variation

Unit

MOID

Value

0.002526

1-sigma variation

Unit

Orbit Period

Value

604.0854

1-sigma variation

Unit

U parameter

Value

4.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.84242E-10	1.05956E-10	1.99027E-10	-1.09632E-9	1.91836E-9	-5.76635E-8
e	1.05956E-10	6.10285E-11	1.13372E-10	-5.83146E-10	1.05404E-9	-3.31708E-8
i	1.99027E-10	1.13372E-10	2.75482E-10	-4.37133E-9	5.02502E-9	-6.19712E-8
Ω	-1.09632E-9	-5.83146E-10	-4.37133E-9	2.03799E-7	-1.99987E-7	3.30473E-7
ω	1.91836E-9	1.05404E-9	5.02502E-9	-1.99987E-7	2.03215E-7	-5.90391E-7
M	-5.76635E-8	-3.31708E-8	-6.19712E-8	3.30473E-7	-5.90391E-7	1.80506E-5

Date of computation: 2026-07-30 14:25 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

23.357

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

60 - 130*

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
[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

441

Unit

Source

[1]

Normalized RMS of residuals

Value

0.560491

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-04-27.28332

Unit

Source

[2]

Last Observation

Value

2025-07-01.373265

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

87 (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

Filters

Initial Date: *

Final Date: *

Normalised Only accepted

Max residual (arcsec):

* - these fields are required

Plot

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 2025HT6 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	1972-04-15 13:34	811.1	0.0682008	0.0509393	0.0058225
EARTH	1977-03-22 16:42	> 1 d	0.0593299	0.0508325	0.0028587
EARTH	1982-01-25 20:59	707.3	0.0750294	0.0734201	0.0005365
MARS	1985-02-04 14:30	44.1	0.0215875	0.0185326	0.0010386
EARTH	1986-12-24 07:21	368.3	0.0472035	0.0396136	0.0025309
EARTH	2020-04-21 19:26	41.0	0.1369494	0.1356112	0.0004461
EARTH	2025-03-23 21:01	< 1 min	0.0584795	0.0584767	0.0000009
EARTH	2030-01-05 15:43	146.4	0.0306743	0.0295235	0.0003837
EARTH	2034-12-17 15:00	13.9	0.1314752	0.1309873	0.0001626
MARS	2067-11-09 23:40	46.1	0.0414780	0.0331410	0.0028002
EARTH	2073-04-19 16:47	365.3	0.1034955	0.0933205	0.0033971
EARTH	2078-03-29 07:17	930.7	0.0464346	0.0414130	0.0016913
EARTH	2083-01-25 17:52	142.0	0.0738560	0.0736130	0.0000810
EARTH	2087-12-22 11:39	352.0	0.0751774	0.0667443	0.0028113
EARTH	2121-04-25 20:00	586.7	0.1691197	0.1481491	0.0069955
EARTH	2126-04-04 17:34	> 1 d	0.0314832	0.0196975	0.0046995

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
326.11822249	354.05969561	0.00252649	MINIMUM
37.33576328	93.08463352	0.01719568	MINIMUM
2.15595136	44.11895637	0.09004477	SADDLE
180.92680618	222.69945379	0.88621387	SADDLE
1.95716986	223.81639466	1.91080313	SADDLE
180.87207420	42.65314327	2.88626998	MAXIMUM

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MOID Plots

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