Asteroids

2025DW help

Last update: 2025-02-22 05:33 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.941

Aphelion (Q)

2.397

Eccentricity (e)

0.436

Inclination (i)

0.7

deg

Orbit period (P)

787.6

Earth MOID

0.00038

U parameter

6.6

Next Earth close approach

Date

2037-11-26

Nominal distance (from Earth center)

0.17876

26742407

Maximum Brightness

29.6

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

2025-02-19

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

1.669056

1-sigma variation

0.000264

Unit

Eccentricity (e)

Value

0.436107

1-sigma variation

0.000093

Unit

Inclination (i)

Value

0.7213

1-sigma variation

0.0002

Unit

Long. of Ascending Node (Ω)

Value

331.4028

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

145.7566

1-sigma variation

0.0007

Unit

Mean Anomaly (M)

Value

46.37771

1-sigma variation

0.01152

Unit

Perihelion distance

Value

0.941170

1-sigma variation

Unit

Aphelion distance

Value

2.396943

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

1.099861

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.005001

1-sigma variation

Unit

MOID

Value

0.000381

1-sigma variation

Unit

Orbit Period

Value

787.5986

1-sigma variation

Unit

U parameter

Value

6.6

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	6.96419E-8	2.45608E-8	4.15650E-8	9.14639E-9	3.16191E-8	-3.03866E-6
e	2.45608E-8	8.66390E-9	1.45775E-8	3.23194E-9	1.01431E-8	-1.07133E-6
i	4.15650E-8	1.45775E-8	3.02213E-8	3.53508E-9	6.18158E-8	-1.82660E-6
Ω	9.14639E-9	3.23194E-9	3.53508E-9	2.79027E-9	-6.06072E-10	-3.98074E-7
ω	3.16191E-8	1.01431E-8	6.18158E-8	-6.06072E-10	5.30381E-7	-1.54216E-6
M	-3.03866E-6	-1.07133E-6	-1.82660E-6	-3.98074E-7	-1.54216E-6	1.32636E-4

Date of computation: 2025-02-20 02:30 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

30.773

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

[-]

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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

0.7

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.720455

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-02-19.353093

Unit

Source

[2]

Last Observation

Value

2025-02-20.020712

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

19 (2)

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 2025DW 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	1982-03-06 09:25	> 1 d	0.1238349	0.0001635	0.0489337
EARTH	1983-12-29 08:31	> 1 w	0.0483362	0.0044550	0.0218114
EARTH	1985-11-15 22:54	> 1 d	0.1949007	0.0039810	0.0643558
EARTH	2025-02-18 19:08	< 1 min	0.0008193	0.0008185	0.0000003
EARTH	2037-11-26 10:21	> 1 d	0.1787619	0.1213213	0.0191688
EARTH	2053-03-07 11:08	> 1 d	0.1124440	0.0200982	0.0307866
EARTH	2065-12-07 22:43	> 1 d	0.0601026	0.0148975	0.0162347
EARTH	2081-03-08 08:42	> 1 d	0.1155652	0.0012245	0.0467345
EARTH	2093-11-28 13:37	> 1 d	0.1634131	0.0120802	0.0729636
EARTH	2109-02-23 00:29	> 1 w	0.0087810	0.0000080	0.0639754

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
20.85559812	46.97125791	0.00038108	MINIMUM
340.28956235	344.19263118	0.01133310	MINIMUM
0.32930534	15.19370060	0.04356609	SADDLE
180.20750843	195.15845657	1.38124845	SADDLE
0.55377331	195.53780877	1.95688296	SADDLE
180.20990014	15.15672480	3.38111852	MAXIMUM

Download:

MOID Plots

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

Level lines of the squared distance function

2025DW

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS
2068-02-19.806	76430.806	-3.885	1.71 ± 0.000	1.87E4	1.75E-8	7.89E-12	-10.54
2081-02-19.511	81179.511	1.355	1.75 ± 0.001	3.19E3	3.94E-5	1.78E-8	-7.31
2083-02-19.726	81909.726	1.365	0.88 ± 0.001	1.90E6	2.59E-7	1.17E-10	-9.50
2084-02-19.638	82274.638	-3.437	0.21 ± 0.011	1.95E7	1.98E-10	8.92E-14	-12.63
2085-02-19.110	82640.110	-3.680	1.66 ± 0.001	1.03E5	6.10E-9	2.75E-12	-11.15
2088-02-19.967	83735.967	1.347	1.09 ± 0.006	7.21E6	6.41E-8	2.89E-11	-10.15
2089-02-19.347	84101.347	1.358	1.56 ± 0.006	1.32E8	2.13E-9	9.65E-13	-11.63
2094-02-19.487	85927.487	1.259	0.30 ± 0.007	5.03E4	1.29E-5	5.85E-9	-7.88
2096-02-19.698	86657.698	-3.916	1.34 ± 0.001	3.21E5	1.40E-9	6.29E-13	-11.86
2101-02-20.198	88484.198	-2.867	0.55 ± 0.003	5.66E6	3.97E-9	1.79E-12	-11.44
2102-02-20.610	88849.610	1.383	1.53 ± 0.001	2.12E6	1.37E-7	6.17E-11	-9.90
2105-02-20.196	89945.196	-3.127	1.54 ± 0.006	8.72E6	6.59E-10	2.97E-13	-12.24
2107-02-20.661	90675.661	4.589	0.63 ± 0.001	1.48E3	2.42E-8	1.10E-11	-10.68
2108-02-20.855	91040.855	-3.568	1.11 ± 0.000	2.15E6	9.40E-10	4.24E-13	-12.10
2109-02-19.900	91405.900	1.352	1.49 ± 0.000	8.81E7	3.80E-9	1.71E-12	-11.50
2109-02-20.679	91406.679	0.142	0.45 ± 0.000	1.34E3	1.02E-3	4.62E-7	-6.07
2109-02-20.722	91406.722	0.884	0.92 ± 0.000	4.93E3	1.69E-4	7.65E-8	-6.85
2110-02-20.731	91771.731	0.143	1.27 ± 0.016	4.65E7	2.18E-8	9.85E-12	-10.74
2111-02-20.518	92136.518	-3.917	0.58 ± 0.032	7.28E6	9.08E-11	4.09E-14	-13.13
2111-02-20.952	92136.952	0.161	0.87 ± 0.000	9.70E5	1.28E-6	5.78E-10	-8.98
2111-02-21.014	92137.014	0.878	1.72 ± 0.000	3.31E6	2.80E-7	1.27E-10	-9.64
2112-02-21.202	92502.202	0.146	1.22 ± 0.000	3.48E7	3.01E-8	1.36E-11	-10.62
2114-02-20.739	93232.739	0.148	0.72 ± 0.000	2.89E7	4.49E-8	2.03E-11	-10.45
2118-02-20.320	94693.320	4.507	1.37 ± 0.000	2.72E5	2.01E-10	9.12E-14	-12.82
2118-02-20.561	94693.561	0.107	1.60 ± 0.001	1.17E6	5.72E-7	2.58E-10	-9.37
2120-02-21.261	95424.261	0.069	0.54 ± 0.000	3.62E5	3.78E-6	1.71E-9	-8.55
2120-02-21.302	95424.302	0.903	1.17 ± 0.001	1.26E6	6.44E-7	2.91E-10	-9.32
2121-02-20.906	95789.906	0.128	1.40 ± 0.000	9.21E6	9.62E-8	4.36E-11	-10.15
2122-02-20.558	96154.558	4.779	1.49 ± 0.001	6.50E4	1.36E-10	6.17E-14	-13.01
2122-02-20.884	96154.884	-0.115	0.39 ± 0.000	3.65E4	3.81E-5	1.72E-8	-7.56
2122-02-20.942	96154.942	0.945	1.38 ± 0.000	1.61E5	3.71E-6	1.68E-9	-8.57


Based on 19 optical observations (of which 2 are rejected as outliers) from 2025/02/19.353 to 2025/02/20.021.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.80 and 1.80 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 4.0, Date of computation=20250220 024131.453 UTC.

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