Asteroids

2012FN help

Last update: 2025-07-29 02:36 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.994

Aphelion (Q)

1.449

Eccentricity (e)

0.186

Inclination (i)

3.2

deg

Orbit period (P)

493.0

Earth MOID

0.01554

U parameter

9.0

Next Earth close approach

Date

2039-02-10

Nominal distance (from Earth center)

0.03975

5947000

Maximum Brightness

25.2

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

29.5

mag

Diameter

3 - 8*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2012-03-17

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

1.221332

1-sigma variation

0.017194

Unit

Eccentricity (e)

Value

0.186418

1-sigma variation

0.013454

Unit

Inclination (i)

Value

3.2203

1-sigma variation

0.2577

Unit

Long. of Ascending Node (Ω)

Value

356.7740

1-sigma variation

0.0747

Unit

Arg. of Perihelion (ω)

Value

148.3139

1-sigma variation

5.0254

Unit

Mean Anomaly (M)

Value

285.01565

1-sigma variation

78.00010

Unit

Perihelion distance

Value

0.993654

1-sigma variation

Unit

Aphelion distance

Value

1.449011

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.397027

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.022136

1-sigma variation

Unit

MOID

Value

0.015544

1-sigma variation

Unit

Orbit Period

Value

493.0024

1-sigma variation

Unit

U parameter

Value

9.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.95619E-4	1.97173E-4	4.34295E-3	1.24452E-3	1.09746E-3	-1.34002E0
e	1.97173E-4	1.81009E-4	2.53812E-3	9.59825E-4	-3.46211E-2	-8.71725E-1
i	4.34295E-3	2.53812E-3	6.64055E-2	1.73436E-2	2.72207E-1	-1.98459E1
Ω	1.24452E-3	9.59825E-4	1.73436E-2	5.57941E-3	-8.80528E-2	-5.58352E0
ω	1.09746E-3	-3.46211E-2	2.72207E-1	-8.80528E-2	2.52548E1	-2.07206E1
M	-1.34002E0	-8.71725E-1	-1.98459E1	-5.58352E0	-2.07206E1	6.08401E3

Date of computation: 2025-07-29 02:36 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

29.455

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

3 - 8*

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

0.1

Unit

Source

[1]

Unobserved

Value

4899

Unit

Source

[1]

Normalized RMS of residuals

Value

0.501504

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2012-03-17.30111

Unit

Source

[2]

Last Observation

Value

2012-03-17.4312

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

17 (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 2012FN 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
MARS	1950-10-24 21:26	> 1 mo	0.0360051	0.0165343	3.4148819
EARTH	1965-02-26 13:09	> 1 mo	0.0220751	0.0000000	0.7903825
EARTH	1968-12-03 04:21	> 1 mo	0.1997345	0.0670572	1.5201515
EARTH	1969-03-28 09:59	> 1 mo	0.1219348	0.0010803	2.2510675
EARTH	2008-01-16 09:49	> 1 mo	0.0975543	0.0360507	0.5332806
EARTH	2012-03-09 21:32	477.2	0.0170094	0.0097464	0.0024218
EARTH	2039-02-10 15:30	> 1 mo	0.0397532	0.0000000	2.1052368
EARTH	2043-03-31 06:54	> 1 mo	0.1382828	0.0044830	1.0631902
EARTH	2074-01-08 23:23	> 1 mo	0.1823208	0.0441872	16.9332876
EARTH	2078-02-28 14:12	> 1 mo	0.0195699	0.0000000	8.4806481
EARTH	2082-03-22 06:33	> 1 mo	0.0576246	0.0050429	45.4825970
EARTH	2125-01-13 22:02	> 1 mo	0.1521265	0.0399626	301.5612218

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
18.02497496	63.72180654	0.01554401	MINIMUM
181.44202855	224.54156689	0.43870691	SADDLE
3.43135630	226.34047775	2.00500067	SADDLE
182.56430291	45.46714221	2.43696407	MAXIMUM

Download:

MOID Plots

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