Asteroids

2025HT6 help

Last update: 2025-05-18 12:30 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.899

Aphelion (Q)

1.899

Eccentricity (e)

0.358

Inclination (i)

1.0

deg

Orbit period (P)

604.3

Earth MOID

0.00249

U parameter

8.1

Next Earth close approach

Date

2030-01-07

Nominal distance (from Earth center)

0.03628

5427443

Maximum Brightness

21.4

mag

Risk

Object is in risk list

Object is in priority list

Physical Properties

Absolute Magnitude (H)

23.3

mag

Diameter

60 - 130*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-04-27

Observatory

MAP, 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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.398874

1-sigma variation

0.001632

Unit

Eccentricity (e)

Value

0.357581

1-sigma variation

0.000932

Unit

Inclination (i)

Value

0.9878

1-sigma variation

0.0030

Unit

Long. of Ascending Node (Ω)

Value

107.0599

1-sigma variation

0.0522

Unit

Arg. of Perihelion (ω)

Value

39.0547

1-sigma variation

0.0438

Unit

Mean Anomaly (M)

Value

43.17089

1-sigma variation

0.07968

Unit

Perihelion distance

Value

0.898664

1-sigma variation

Unit

Aphelion distance

Value

1.899085

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.028043

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.670317

1-sigma variation

Unit

MOID

Value

0.002488

1-sigma variation

Unit

Orbit Period

Value

604.3193

1-sigma variation

Unit

U parameter

Value

8.1

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.66453E-6	1.52129E-6	4.84194E-6	-8.50616E-5	7.13197E-5	-1.30068E-4
e	1.52129E-6	8.68571E-7	2.76451E-6	-4.85672E-5	4.07207E-5	-7.42606E-5
i	4.84194E-6	2.76451E-6	8.80205E-6	-1.54751E-4	1.29739E-4	-2.36327E-4
Ω	-8.50616E-5	-4.85672E-5	-1.54751E-4	2.72589E-3	-2.28524E-3	4.15082E-3
ω	7.13197E-5	4.07207E-5	1.29739E-4	-2.28524E-3	1.91603E-3	-3.48041E-3
M	-1.30068E-4	-7.42606E-5	-2.36327E-4	4.15082E-3	-3.48041E-3	6.34945E-3

Date of computation: 2025-05-18 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

23.331

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

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

Unit

Source

[1]

Normalized RMS of residuals

Value

0.551952

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

2025-05-18.23203

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

62 (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 2025HT6 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	1972-04-19 13:24	> 1 w	0.1123489	0.0174134	0.1926792
EARTH	1977-03-30 10:47	> 1 d	0.0412155	0.0184993	0.0100530
EARTH	1982-01-23 12:25	> 1 mo	0.0721792	0.0086760	0.0817434
MARS	1985-02-03 23:42	> 1 d	0.0439946	0.0094323	0.2144778
EARTH	1986-12-20 19:32	> 1 w	0.0851612	0.0032661	0.3079028
EARTH	2020-04-21 07:55	> 1 d	0.1303079	0.0175658	0.0536059
EARTH	2025-03-23 20:59	8.4	0.0585032	0.0579664	0.0001789
EARTH	2030-01-07 05:31	> 1 w	0.0362802	0.0029859	0.0445445
EARTH	2034-12-17 15:32	> 1 d	0.1312057	0.0707803	0.0201478
MARS	2067-11-09 12:38	> 1 d	0.0131934	0.0098299	0.1191378
EARTH	2073-04-16 15:21	> 1 w	0.0686838	0.0174370	0.2481840
EARTH	2078-03-23 23:08	> 1 mo	0.0587220	0.0177089	0.0889777
EARTH	2083-01-28 21:10	> 1 w	0.0774374	0.0317989	0.0163743
EARTH	2087-12-25 20:12	> 1 w	0.0413697	0.0018004	0.2107714
EARTH	2121-04-23 01:39	> 1 mo	0.1270959	0.0174940	1.1735896

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
326.14471459	356.21100542	0.00248788	MINIMUM
37.37308553	95.31235003	0.01724954	MINIMUM
2.19143354	46.31260191	0.09034043	SADDLE
180.94336808	224.87243069	0.88763049	SADDLE
1.99049128	226.00740002	1.91010520	SADDLE
180.88936149	44.82695057	2.88727649	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2025HT6

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS	TS
2126-01-01.114	97565.114	-0.239	0.99 ± 0.032	3.35E7	3.37E-8	4.54E-7	-7.05	n/a
2126-01-01.122	97565.122	-0.240	0.50 ± 0.011	2.22E7	5.87E-8	7.91E-7	-6.81	n/a
2126-01-01.384	97565.384	-3.447	1.71 ± 0.000	8.62E7	3.60E-11	4.76E-10	-10.03	n/a


Based on 62 optical observations (of which 0 are rejected as outliers) from 2025/04/27.283 to 2025/05/18.232.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.75 and 1.75 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20250518 125151.689 UTC.

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