Asteroids

2001FA58 help

Last update: 2025-09-10 00:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.633

Aphelion (Q)

3.879

Eccentricity (e)

0.720

Inclination (i)

8.2

deg

Orbit period (P)

1237.7

Earth MOID

0.04346

U parameter

0.0

Next Earth close approach

Date

2109-09-27

Nominal distance (from Earth center)

0.13557

20280573

Maximum Brightness

20.4

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

21.5

mag

Diameter

140 - 300*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2001-03-23

Observatory

Lowell Observatory-LONEOS

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

2.255975

1-sigma variation

6.017E-9

Unit

Eccentricity (e)

Value

0.719578

1-sigma variation

2.976E-8

Unit

Inclination (i)

Value

8.2172

1-sigma variation

3.268E-5

Unit

Long. of Ascending Node (Ω)

Value

155.8087

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

114.5483

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

78.71134

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.632625

1-sigma variation

Unit

Aphelion distance

Value

3.879325

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.561305

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.173273

1-sigma variation

Unit

MOID

Value

0.043460

1-sigma variation

Unit

Orbit Period

Value

1237.6556

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.61996E-17	-4.65291E-17	1.62780E-13	4.04138E-13	-4.08431E-13	-2.67689E-14
e	-4.65291E-17	8.85791E-16	2.59096E-14	1.29123E-13	7.07159E-14	2.72958E-14
i	1.62780E-13	2.59096E-14	1.06813E-9	2.85659E-9	-2.80367E-9	-1.04865E-10
Ω	4.04138E-13	1.29123E-13	2.85659E-9	9.34766E-9	-9.33968E-9	-1.75219E-10
ω	-4.08431E-13	7.07159E-14	-2.80367E-9	-9.33968E-9	9.45824E-9	1.50985E-10
M	-2.67689E-14	2.72958E-14	-1.04865E-10	-1.75219E-10	1.50985E-10	3.20874E-11

Date of computation: 2025-09-10 00:30 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

[1]

Taxonomy (all)

Value

Unit

Source

[2]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

21.459

Unit

mag

Source

[3]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[3]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[4]

Diameter

Value

140 - 300*

Unit

Source

[4]

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]	EARN	1.) Alexey V. Sergeyev and Benoit Carry A&A, 652 (2021) A59
[2]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[3]	ESA Aegis	ESA orbit determination and impact monitoring system
[4]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

6246

Unit

Source

[1]

Unobserved

Value

2760

Unit

Source

[1]

Normalized RMS of residuals

Value

0.493049

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2001-02-20.38917

Unit

Source

[2]

Last Observation

Value

2018-03-29.456544

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

101 (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 2001FA58 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	1967-03-23 00:44	< 1 min	0.1212670	0.1212626	0.0000015
EARTH	1977-09-04 10:59	< 1 min	0.1279794	0.1279758	0.0000012
EARTH	1984-03-30 18:52	< 1 min	0.0777720	0.0777706	0.0000005
EARTH	1994-09-16 21:33	< 1 min	0.0450729	0.0450719	0.0000003
EARTH	2001-04-02 07:55	< 1 min	0.1127918	0.1127911	0.0000002
EARTH	2011-09-13 00:21	< 1 min	0.0452158	0.0452154	0.0000001
EARTH	2018-03-31 05:34	< 1 min	0.0969319	0.0969314	0.0000002
EARTH	2109-09-27 01:52	< 1 min	0.1355673	0.1355620	0.0000017

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
39.08570267	251.48092170	0.04329705	MINIMUM
320.18937290	83.15203686	0.07414768	MINIMUM
359.26367544	166.13563326	0.39772470	SADDLE
0.02849847	348.10343172	1.61304095	SADDLE
179.90040461	348.34305148	2.90638546	SADDLE
180.13700838	168.44037098	4.88833524	MAXIMUM

Download:

MOID Plots

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