Asteroids

2025HY help

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

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.733

Aphelion (Q)

1.390

Eccentricity (e)

0.310

Inclination (i)

10.7

deg

Orbit period (P)

399.5

Earth MOID

0.02203

U parameter

7.4

Next Earth close approach

Date

2027-11-15

Nominal distance (from Earth center)

0.11392

17042586

Maximum Brightness

25.4

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

26.5

mag

Diameter

13 - 30*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-04-21

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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.061516

1-sigma variation

0.000263

Unit

Eccentricity (e)

Value

0.309595

1-sigma variation

0.000392

Unit

Inclination (i)

Value

10.6617

1-sigma variation

0.0143

Unit

Long. of Ascending Node (Ω)

Value

210.6041

1-sigma variation

0.0004

Unit

Arg. of Perihelion (ω)

Value

106.4143

1-sigma variation

0.0080

Unit

Mean Anomaly (M)

Value

301.87725

1-sigma variation

0.05055

Unit

Perihelion distance

Value

0.732876

1-sigma variation

Unit

Aphelion distance

Value

1.390156

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.046855

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.111987

1-sigma variation

Unit

MOID

Value

0.022032

1-sigma variation

Unit

Orbit Period

Value

399.4738

1-sigma variation

Unit

U parameter

Value

7.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	6.91499E-8	1.03050E-7	3.76948E-6	-9.45395E-8	-2.09240E-6	1.32921E-5
e	1.03050E-7	1.53579E-7	5.61818E-6	-1.40891E-7	-3.11710E-6	1.98085E-5
i	3.76948E-6	5.61818E-6	2.05540E-4	-5.15369E-6	-1.13983E-4	7.24586E-4
Ω	-9.45395E-8	-1.40891E-7	-5.15369E-6	1.29303E-7	2.86010E-6	-1.81726E-5
ω	-2.09240E-6	-3.11710E-6	-1.13983E-4	2.86010E-6	6.34202E-5	-4.02187E-4
M	1.32921E-5	1.98085E-5	7.24586E-4	-1.81726E-5	-4.02187E-4	2.55503E-3

Date of computation: 2025-04-26 13:01 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

26.499

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

13 - 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

0.669255

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-04-21.237867

Unit

Source

[2]

Last Observation

Value

2025-04-26.411339

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

36 (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 2025HY 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	1954-04-28 15:18	> 1 d	0.0704697	0.0203552	0.0795439
EARTH	1956-11-15 01:41	> 1 d	0.1147098	0.0606981	0.0558595
EARTH	1966-04-27 12:29	482.8	0.0306153	0.0197652	0.0066520
EARTH	1968-11-13 15:52	> 1 d	0.0950532	0.0617216	0.0224161
EARTH	1978-04-28 23:05	> 1 d	0.0752426	0.0207596	0.0889788
EARTH	1980-11-16 23:28	> 1 d	0.1486528	0.0624326	0.0923319
EARTH	1990-04-27 00:32	> 1 d	0.1815311	0.0311918	0.0931095
EARTH	2003-10-18 09:20	> 1 w	0.1802182	0.0933460	0.0523420
EARTH	2013-04-23 04:36	> 1 d	0.1030430	0.0214084	0.0316457
EARTH	2015-11-07 20:32	> 1 d	0.0670095	0.0601033	0.0113619
EARTH	2025-04-27 08:42	< 1 min	0.0274168	0.0273136	0.0000344
EARTH	2027-11-15 18:24	300.9	0.1139226	0.1032020	0.0036481
EARTH	2048-04-20 01:41	> 1 d	0.1784781	0.0240588	0.0548722
EARTH	2050-11-01 04:47	> 1 d	0.1141601	0.0656639	0.0488922
EARTH	2060-04-26 02:06	> 1 d	0.0291601	0.0226111	0.0542072
EARTH	2062-11-12 07:28	> 1 d	0.0698285	0.0614222	0.0473862
EARTH	2072-04-28 07:46	> 1 d	0.0570888	0.0228592	0.1623894
EARTH	2074-11-17 01:54	> 1 w	0.1338247	0.0628343	0.1493994
EARTH	2084-04-26 07:08	> 1 w	0.1851666	0.0345120	0.0928183
EARTH	2097-10-20 19:57	> 1 w	0.1707700	0.0870833	0.0353557
EARTH	2107-04-25 13:52	> 1 d	0.0917738	0.0233431	0.1249724
EARTH	2109-11-09 11:23	> 1 w	0.0652126	0.0615884	0.0473834
EARTH	2119-04-29 19:29	> 1 w	0.0418233	0.0237877	0.2041856
EARTH	2121-11-17 18:44	> 1 w	0.1306942	0.0634885	0.2241873

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
277.81335883	113.38943791	0.02203166	MINIMUM
72.11263650	305.45878884	0.05950938	MINIMUM
354.37718309	207.80479508	0.32171779	SADDLE
175.78048228	31.58746844	0.45530551	SADDLE
357.17610563	31.77793146	1.71235508	SADDLE
179.49421469	214.28863942	2.39418850	MAXIMUM

Download:

MOID Plots

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