Asteroids

2025FW18 help

Last update: 2025-11-24 20:58 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Amor

Perihelion (q)

1.058

Aphelion (Q)

2.589

Eccentricity (e)

0.420

Inclination (i)

4.1

deg

Orbit period (P)

899.4

Earth MOID

0.05328

U parameter

4.8

Next Earth close approach

Date

2057-07-21

Nominal distance (from Earth center)

0.19727

29510653

Maximum Brightness

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

22.1

mag

Diameter

100 - 230*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-03-29

Observatory

Pan-STARRS 2, 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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.823516

1-sigma variation

0.000021

Unit

Eccentricity (e)

Value

0.419723

1-sigma variation

0.000006

Unit

Inclination (i)

Value

4.0678

1-sigma variation

4.317E-5

Unit

Long. of Ascending Node (Ω)

Value

234.6275

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

31.5651

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

59.57273

1-sigma variation

0.00104

Unit

Perihelion distance

Value

1.058144

1-sigma variation

Unit

Aphelion distance

Value

2.588887

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.093845

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

1.350355

1-sigma variation

Unit

MOID

Value

0.053276

1-sigma variation

Unit

Orbit Period

Value

899.4202

1-sigma variation

Unit

U parameter

Value

4.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.36627E-10	1.32132E-10	8.95965E-10	-1.91576E-9	1.06877E-9	-2.17297E-8
e	1.32132E-10	3.99882E-11	2.70982E-10	-5.78739E-10	3.23203E-10	-6.57612E-9
i	8.95965E-10	2.70982E-10	1.86331E-9	-3.96150E-9	2.16572E-9	-4.45698E-8
Ω	-1.91576E-9	-5.78739E-10	-3.96150E-9	1.18052E-8	-7.69816E-9	9.52117E-8
ω	1.06877E-9	3.23203E-10	2.16572E-9	-7.69816E-9	5.65633E-9	-5.32187E-8
M	-2.17297E-8	-6.57612E-9	-4.45698E-8	9.52117E-8	-5.32187E-8	1.08148E-6

Date of computation: 2025-11-24 20:58 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

22.09

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

100 - 230*

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

169

Unit

Source

[1]

Unobserved

Value

130

Unit

Source

[1]

Normalized RMS of residuals

Value

0.449995

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-03-29.405917

Unit

Source

[2]

Last Observation

Value

2025-09-14.090712

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

90 (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 2025FW18 from 1950 to 2126

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1966-05-22 10:16	365.6	0.1108570	0.1053531	0.0018394
EARTH	1993-07-18 21:57	373.8	0.1800854	0.1719182	0.0027280
EARTH	2025-07-12 07:42	< 1 min	0.1277835	0.1277790	0.0000015
EARTH	2057-07-21 19:45	343.7	0.1972665	0.1887239	0.0028527
EARTH	2094-05-24 11:34	218.1	0.1094045	0.1062469	0.0010545

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
355.39315378	157.26841988	0.05327553	MINIMUM
180.37914528	345.16361450	1.60586102	SADDLE
0.63199623	345.58266580	2.04189207	SADDLE
180.13898951	165.01453288	3.60594479	MAXIMUM

Download:

MOID Plots

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