Asteroids

2025DD8 help

Last update: 2025-03-13 15:55 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.645

Aphelion (Q)

4.495

Eccentricity (e)

0.749

Inclination (i)

9.7

deg

Orbit period (P)

1504.9

Earth MOID

0.15307

U parameter

9.0

Next Earth close approach

Date

2025-03-20

Nominal distance (from Earth center)

0.17829

26671772

Maximum Brightness

mag

Risk

Object is not in risk list

Object is in priority list

Physical Properties

Absolute Magnitude (H)

21.5

mag

Diameter

130 - 290*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-02-24

Observatory

Pan-STARRS 1, 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

2.570015

1-sigma variation

0.044741

Unit

Eccentricity (e)

Value

0.748898

1-sigma variation

0.004993

Unit

Inclination (i)

Value

9.6531

1-sigma variation

0.0713

Unit

Long. of Ascending Node (Ω)

Value

268.2197

1-sigma variation

0.3059

Unit

Arg. of Perihelion (ω)

Value

345.4299

1-sigma variation

0.2777

Unit

Mean Anomaly (M)

Value

0.94850

1-sigma variation

0.00173

Unit

Perihelion distance

Value

0.645336

1-sigma variation

Unit

Aphelion distance

Value

4.494695

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.361427

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

3.115909

1-sigma variation

Unit

MOID

Value

0.153072

1-sigma variation

Unit

Orbit Period

Value

1504.8804

1-sigma variation

Unit

U parameter

Value

9.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.00175E-3	2.23401E-4	3.18303E-3	1.35397E-2	-1.22866E-2	5.68123E-5
e	2.23401E-4	2.49321E-5	3.55232E-4	1.51104E-3	-1.37119E-3	6.34095E-6
i	3.18303E-3	3.55232E-4	5.08345E-3	2.17406E-2	-1.97302E-2	8.48331E-5
Ω	1.35397E-2	1.51104E-3	2.17406E-2	9.35978E-2	-8.49529E-2	3.31673E-4
ω	-1.22866E-2	-1.37119E-3	-1.97302E-2	-8.49529E-2	7.71076E-2	-3.00538E-4
M	5.68123E-5	6.34095E-6	8.48331E-5	3.31673E-4	-3.00538E-4	2.98892E-6

Date of computation: 2025-03-01 11:58 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

21.54

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

130 - 290*

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

0.317415

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-02-24.383568

Unit

Source

[2]

Last Observation

Value

2025-02-28.439499

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

24 (1)

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 2025DD8 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	2025-03-20 12:45	4.6	0.1782898	0.1745219	0.0012560

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
34.39879261	230.32769042	0.15307217	MINIMUM
325.49279360	71.77420960	0.16656243	MINIMUM
359.62983246	149.91271156	0.37054586	SADDLE
0.39052516	331.96083231	1.63056508	SADDLE
179.98717073	331.70808282	3.51025206	SADDLE
180.15109437	151.77205497	5.50828337	MAXIMUM

Download:

MOID Plots

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