Asteroids

2025FF18 help

Last update: 2026-07-30 14:25 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.768

Aphelion (Q)

1.284

Eccentricity (e)

0.251

Inclination (i)

1.7

deg

Orbit period (P)

379.4

Earth MOID

0.00989

U parameter

6.7

Next Earth close approach

Date

2028-09-05

Nominal distance (from Earth center)

0.1997

29875277

Maximum Brightness

30.2

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

25.9

mag

Diameter

18 - 40*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2025-03-30

Observatory

MAPS, San Pedro de Atacama

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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.025688

1-sigma variation

0.000082

Unit

Eccentricity (e)

Value

0.251396

1-sigma variation

0.000239

Unit

Inclination (i)

Value

1.6763

1-sigma variation

0.0018

Unit

Long. of Ascending Node (Ω)

Value

358.0365

1-sigma variation

0.0020

Unit

Arg. of Perihelion (ω)

Value

298.8688

1-sigma variation

0.0010

Unit

Mean Anomaly (M)

Value

334.28022

1-sigma variation

0.02293

Unit

Perihelion distance

Value

0.767834

1-sigma variation

Unit

Aphelion distance

Value

1.283542

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.147982

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.098738

1-sigma variation

Unit

MOID

Value

0.009886

1-sigma variation

Unit

Orbit Period

Value

379.4207

1-sigma variation

Unit

U parameter

Value

6.7

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	6.69372E-9	1.95381E-8	1.43076E-7	1.53715E-7	-6.77352E-8	-1.87541E-6
e	1.95381E-8	5.71979E-8	4.19707E-7	4.55725E-7	-1.91464E-7	-5.46851E-6
i	1.43076E-7	4.19707E-7	3.08457E-6	3.37699E-6	-1.37465E-6	-4.00173E-5
Ω	1.53715E-7	4.55725E-7	3.37699E-6	3.85802E-6	-1.32800E-6	-4.28348E-5
ω	-6.77352E-8	-1.91464E-7	-1.37465E-6	-1.32800E-6	9.49725E-7	1.91842E-5
M	-1.87541E-6	-5.46851E-6	-4.00173E-5	-4.28348E-5	1.91842E-5	5.25628E-4

Date of computation: 2026-07-30 14:25 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

25.87

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

18 - 40*

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

570

Unit

Source

[1]

Normalized RMS of residuals

Value

0.701588

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2025-03-30.15

Unit

Source

[2]

Last Observation

Value

2025-04-07.255308

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

34 (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

Filters

Initial Date: *

Final Date: *

Normalised Only accepted

Max residual (arcsec):

* - these fields are required

Plot

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Note: Ephemerides requests are limited to a maximum of 1000 points and a final date not exceeding 2040/12/31 00:00.

Close Approaches for 2025FF18 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	1967-03-31 10:49	> 1 d	0.1846631	0.0079810	0.0817444
EARTH	1968-04-08 10:37	> 1 d	0.0396282	0.0096761	0.0850453
EARTH	1972-10-27 02:02	1218.7	0.0193806	0.0173704	0.0093203
EARTH	1996-04-04 19:11	60.7	0.0543448	0.0512756	0.0010237
EARTH	1997-03-24 06:44	444.0	0.1620187	0.1591487	0.0009567
EARTH	1997-05-08 00:55	1133.7	0.1636473	0.1612860	0.0007871
EARTH	2000-09-28 17:37	> 1 d	0.1579789	0.1381880	0.0066179
EARTH	2000-11-08 15:05	> 1 d	0.1589596	0.1370488	0.0073067
EARTH	2001-10-30 11:12	581.0	0.0598106	0.0313636	0.0099517
EARTH	2025-04-08 04:11	< 1 min	0.0220179	0.0219579	0.0000200
EARTH	2028-09-05 08:18	> 1 d	0.1997039	0.1977476	0.0006525
EARTH	2029-10-27 21:34	153.0	0.0192930	0.0171649	0.0011299
EARTH	2051-04-07 16:39	> 1 d	0.0230286	0.0103304	0.0232728
EARTH	2052-03-14 03:08	> 1 d	0.1916165	0.1717745	0.0066161
EARTH	2052-05-23 01:30	> 1 d	0.1886366	0.1701547	0.0061635
EARTH	2055-10-26 00:13	872.9	0.0778543	0.0172857	0.0421028
EARTH	2056-11-03 15:28	> 1 d	0.1552865	0.0176589	0.0555943
EARTH	2079-04-04 01:40	> 1 w	0.1134759	0.0101724	0.2321046
EARTH	2080-04-09 21:39	> 1 w	0.1083270	0.0107278	0.2251718
EARTH	2083-09-15 14:19	> 1 mo	0.1844190	0.0450694	0.0984833
EARTH	2083-11-22 05:26	> 1 mo	0.1900706	0.0136095	0.1203874
EARTH	2084-10-29 10:00	> 1 w	0.0285070	0.0174555	0.1294998
VENUS	2088-10-09 03:16	> 1 w	0.0482035	0.0375509	0.0272276
EARTH	2107-04-03 12:16	> 1 mo	0.1642340	0.0107296	1.0347629
EARTH	2108-04-11 07:28	> 1 w	0.0628258	0.0105655	1.0435715
EARTH	2111-09-17 00:45	> 1 mo	0.1829479	0.0476753	0.2930431
EARTH	2111-11-22 22:17	> 1 mo	0.1891782	0.0143611	0.3675719
EARTH	2112-10-31 05:25	> 1 w	0.0432987	0.0170674	0.3352617

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
275.32452831	92.19406717	0.00988601	MINIMUM
82.64097083	290.70639616	0.01729681	MINIMUM
358.74171723	191.12626872	0.24970198	SADDLE
179.16940341	11.71802618	0.30106104	SADDLE
359.01797789	11.48310410	1.75155473	SADDLE
179.43377516	191.91505081	2.29981807	MAXIMUM

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MOID Plots

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