Asteroids

2025DD4 help

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

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.255

Aphelion (Q)

3.836

Eccentricity (e)

0.876

Inclination (i)

6.8

deg

Orbit period (P)

1068.4

Earth MOID

0.03556

U parameter

9.0

Next Earth close approach

Date

2028-02-26

Nominal distance (from Earth center)

0.12907

19308919

Maximum Brightness

20.6

mag

Risk

Object is not in risk list

Object is in priority list

Physical Properties

Absolute Magnitude (H)

21.5

mag

Diameter

130 - 300*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-02-22

Observatory

Kitt Peak-Bok

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

2.045246

1-sigma variation

0.019262

Unit

Eccentricity (e)

Value

0.875529

1-sigma variation

0.002163

Unit

Inclination (i)

Value

6.7669

1-sigma variation

0.0617

Unit

Long. of Ascending Node (Ω)

Value

324.7828

1-sigma variation

0.0200

Unit

Arg. of Perihelion (ω)

Value

324.0810

1-sigma variation

0.0767

Unit

Mean Anomaly (M)

Value

1.72023

1-sigma variation

0.01209

Unit

Perihelion distance

Value

0.254573

1-sigma variation

Unit

Aphelion distance

Value

3.835919

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.732462

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.651761

1-sigma variation

Unit

MOID

Value

0.035559

1-sigma variation

Unit

Orbit Period

Value

1068.3580

1-sigma variation

Unit

U parameter

Value

9.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.71013E-4	4.16621E-5	1.18763E-3	3.85840E-4	1.47746E-3	2.32819E-4
e	4.16621E-5	4.67844E-6	1.33368E-4	4.33293E-5	1.65922E-4	2.61446E-5
i	1.18763E-3	1.33368E-4	3.80202E-3	1.23527E-3	4.73025E-3	7.45307E-4
Ω	3.85840E-4	4.33293E-5	1.23527E-3	4.01361E-4	1.53686E-3	2.42142E-4
ω	1.47746E-3	1.65922E-4	4.73025E-3	1.53686E-3	5.88602E-3	9.27256E-4
M	2.32819E-4	2.61446E-5	7.45307E-4	2.42142E-4	9.27256E-4	1.46105E-4

Date of computation: 2025-03-04 14:24 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

21.493

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 - 300*

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

0.640361

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-02-18.33087

Unit

Source

[2]

Last Observation

Value

2025-03-03.434921

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

45 (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 2025DD4 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	1955-03-06 06:09	> 1 mo	0.0924993	0.0311491	1.5333584
EARTH	1972-11-23 02:02	> 1 mo	0.1739083	0.1156454	1.7098574
EARTH	1990-03-04 08:46	> 1 mo	0.0585611	0.0327819	2.0773962
EARTH	2007-11-22 18:33	> 1 mo	0.1579948	0.1165112	0.9623543
EARTH	2028-02-26 21:37	> 1 w	0.1290721	0.0370513	0.2367769
EARTH	2051-11-13 20:30	> 1 mo	0.1338790	0.1187004	0.9847989
EARTH	2081-03-13 22:15	> 1 mo	0.1871199	0.0472286	5.7769221
EARTH	2084-03-04 10:55	> 1 mo	0.0592872	0.0472591	3.6939735
EARTH	2087-02-27 04:10	> 1 mo	0.1917809	0.0495707	6.1296169

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
305.96070781	59.30930416	0.03555881	MINIMUM
53.57503033	313.25614064	0.11656366	MINIMUM
359.52278841	185.31682700	0.76249404	SADDLE
359.63089072	5.75186966	1.23780976	SADDLE
179.91232839	6.76731430	2.85533586	SADDLE
180.02772492	186.79591534	4.85018460	MAXIMUM

Download:

MOID Plots

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