Asteroids

2025HH help

Last update: 2025-04-21 12:30 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Aten

Perihelion (q)

0.679

Aphelion (Q)

1.144

Eccentricity (e)

0.255

Inclination (i)

7.6

deg

Orbit period (P)

317.7

Earth MOID

0.00027

U parameter

4.9

Next Earth close approach

Date

2032-06-04

Nominal distance (from Earth center)

0.1696

25371468

Maximum Brightness

28.8

mag

Risk

Object is in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

30.8

mag

Diameter

1.9 - 4*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-04-18

Observatory

Catalina Sky 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

0.911172

1-sigma variation

0.000004

Unit

Eccentricity (e)

Value

0.255322

1-sigma variation

0.000035

Unit

Inclination (i)

Value

7.6484

1-sigma variation

0.0014

Unit

Long. of Ascending Node (Ω)

Value

207.7014

1-sigma variation

4.144E-5

Unit

Arg. of Perihelion (ω)

Value

233.6873

1-sigma variation

0.0002

Unit

Mean Anomaly (M)

Value

119.42431

1-sigma variation

0.00413

Unit

Perihelion distance

Value

0.678529

1-sigma variation

Unit

Aphelion distance

Value

1.143814

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.000541

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.255487

1-sigma variation

Unit

MOID

Value

0.000274

1-sigma variation

Unit

Orbit Period

Value

317.6864

1-sigma variation

Unit

U parameter

Value

4.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.75134E-11	-1.46012E-10	-5.64612E-9	-8.61159E-11	-7.32863E-10	1.71751E-8
e	-1.46012E-10	1.22559E-9	4.74338E-8	7.49146E-10	6.40121E-9	-1.44540E-7
i	-5.64612E-9	4.74338E-8	1.83736E-6	3.02574E-8	2.48661E-7	-5.59693E-6
Ω	-8.61159E-11	7.49146E-10	3.02574E-8	1.71747E-9	4.36487E-9	-9.05200E-8
ω	-7.32863E-10	6.40121E-9	2.48661E-7	4.36487E-9	4.10348E-8	-7.65971E-7
M	1.71751E-8	-1.44540E-7	-5.59693E-6	-9.05200E-8	-7.65971E-7	1.70642E-5

Date of computation: 2025-04-21 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

30.78

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

1.9 - 4*

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

0.611346

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-04-18.356744

Unit

Source

[2]

Last Observation

Value

2025-04-21.38657

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

22 (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 2025HH 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	2007-10-03 02:21	80.9	0.1926345	0.1886139	0.0013412
EARTH	2008-10-05 16:57	90.2	0.1380209	0.1343031	0.0012412
EARTH	2009-10-09 07:26	98.6	0.0880456	0.0848716	0.0010635
EARTH	2010-10-12 22:55	101.3	0.0488898	0.0470260	0.0006422
EARTH	2011-10-16 12:15	101.9	0.0382001	0.0375748	0.0002365
EARTH	2012-10-19 19:53	137.3	0.0630409	0.0608155	0.0007493
EARTH	2013-10-26 00:44	189.3	0.1023588	0.0997560	0.0008701
EARTH	2014-11-05 03:03	273.8	0.1448016	0.1422524	0.0008515
EARTH	2015-11-21 11:38	415.8	0.1848852	0.1827506	0.0007135
EARTH	2021-04-19 18:16	60.8	0.1574910	0.1556956	0.0005985
EARTH	2022-04-16 15:37	9.8	0.1105636	0.1088820	0.0005606
EARTH	2023-04-17 00:55	10.0	0.0650836	0.0636040	0.0004932
EARTH	2024-04-17 02:14	14.9	0.0245802	0.0234500	0.0003767
EARTH	2025-04-17 23:23	< 1 min	0.0001862	0.0001860	0.0000000
EARTH	2032-06-04 01:38	131.7	0.1695978	0.1693304	0.0000892
EARTH	2039-08-12 21:45	18.1	0.1304265	0.1301427	0.0000957
EARTH	2045-04-18 00:18	8.4	0.0008359	0.0008334	0.0000318
EARTH	2052-04-18 16:57	> 1 mo	0.0317172	0.0004376	1.4255591
VENUS	2056-05-10 09:00	> 1 mo	0.0163185	0.0154052	0.0878280
EARTH	2059-05-03 22:25	> 1 w	0.1112894	0.0739925	0.0449959
EARTH	2066-05-29 23:12	> 1 mo	0.1608090	0.0652020	0.0950808
EARTH	2073-06-22 21:40	> 1 mo	0.1713057	0.1675151	0.0350391
EARTH	2080-07-25 02:21	> 1 mo	0.1468916	0.1029292	0.4321926
VENUS	2083-05-31 07:49	> 1 mo	0.0371005	0.0170979	1.0862177
EARTH	2087-08-12 14:23	> 1 w	0.1034115	0.1033798	0.0028057
EARTH	2093-04-19 00:38	> 1 d	0.0956821	0.0027054	0.7560850
VENUS	2093-11-21 03:20	> 1 mo	0.0228097	0.0156264	0.7087766
EARTH	2094-08-07 12:35	> 1 mo	0.1713871	0.0991671	0.8610516
EARTH	2100-04-18 05:43	> 1 w	0.0173994	0.0011091	1.4335910
EARTH	2107-04-20 08:40	> 1 mo	0.0980403	0.0001896	11.0105194
EARTH	2108-08-10 23:28	> 1 mo	0.1435185	0.1018776	8.6199053
EARTH	2115-08-15 23:02	> 1 mo	0.1020795	0.1017592	1.5233873
EARTH	2122-07-20 06:44	> 1 mo	0.1572853	0.1102600	11.7899139

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
113.50979346	104.67310146	0.00027416	MINIMUM
253.55624887	219.82420211	0.12659847	MINIMUM
191.77719576	167.85359896	0.17709823	SADDLE
4.20579052	344.74808169	0.31907459	SADDLE
359.15591020	158.33323738	1.69138549	SADDLE
177.93684320	337.00250322	2.12564184	MAXIMUM

Download:

MOID Plots

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

Level lines of the squared distance function

2025HH

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS
2079-04-17.075	80505.075	-0.103	0.85 ± 0.022	2.96E6	4.72E-7	2.22E-10	-9.20
2084-04-17.020	82332.020	-0.347	0.16 ± 0.358	6.11E7	2.13E-8	9.95E-12	-10.58
2088-04-16.693	83792.693	0.982	1.45 ± 0.000	2.42E7	3.05E-8	1.43E-11	-10.46
2091-04-17.640	84888.640	4.588	0.59 ± 0.001	2.59E5	1.38E-10	6.46E-14	-12.82


Based on 19 optical observations (of which 0 are rejected as outliers) from 2025/04/18.357 to 2025/04/20.238.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.77 and 1.77 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 5.0, Date of computation=20250420 061446.684 UTC.

Download this part as:

Download Impactor Table as: