Asteroids

2018AF12 help

Last update: 2025-03-29 00:36 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.434

Aphelion (Q)

2.639

Eccentricity (e)

0.718

Inclination (i)

13.0

deg

Orbit period (P)

695.8

Earth MOID

0.07583

U parameter

7.9

Next Earth close approach

Date

2037-01-09

Nominal distance (from Earth center)

0.07501

11220808

Maximum Brightness

18.8

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

21.8

mag

Diameter

120 - 260*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2018-01-14

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

1.536668

1-sigma variation

0.000989

Unit

Eccentricity (e)

Value

0.717580

1-sigma variation

0.000358

Unit

Inclination (i)

Value

13.0397

1-sigma variation

0.0133

Unit

Long. of Ascending Node (Ω)

Value

307.9336

1-sigma variation

0.0029

Unit

Arg. of Perihelion (ω)

Value

49.9204

1-sigma variation

0.0109

Unit

Mean Anomaly (M)

Value

337.00846

1-sigma variation

1.37312

Unit

Perihelion distance

Value

0.433985

1-sigma variation

Unit

Aphelion distance

Value

2.639351

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.504850

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.400789

1-sigma variation

Unit

MOID

Value

0.075834

1-sigma variation

Unit

Orbit Period

Value

695.7747

1-sigma variation

Unit

U parameter

Value

7.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	9.77253E-7	3.53940E-7	1.31159E-5	2.82145E-6	-1.07133E-5	-1.35741E-3
e	3.53940E-7	1.28293E-7	4.75740E-6	1.02297E-6	-3.89521E-6	-4.91624E-4
i	1.31159E-5	4.75740E-6	1.76560E-4	3.79376E-5	-1.44819E-4	-1.82180E-2
Ω	2.82145E-6	1.02297E-6	3.79376E-5	8.16045E-6	-3.10943E-5	-3.91901E-3
ω	-1.07133E-5	-3.89521E-6	-1.44819E-4	-3.10943E-5	1.19646E-4	1.48807E-2
M	-1.35741E-3	-4.91624E-4	-1.82180E-2	-3.91901E-3	1.48807E-2	1.88545E0

Date of computation: 2025-03-29 00:36 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

21.79

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

120 - 260*

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

Unit

Source

[1]

Unobserved

Value

2644

Unit

Source

[1]

Normalized RMS of residuals

Value

0.500193

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2018-01-14.36021

Unit

Source

[2]

Last Observation

Value

2018-02-13.261302

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

39 (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 2018AF12 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	1957-01-11 15:58	> 1 w	0.1039367	0.0809615	0.3664635
EARTH	1997-01-09 17:20	> 1 d	0.0789990	0.0778712	0.0206733
EARTH	2037-01-09 06:31	> 1 d	0.0750065	0.0748700	0.0067515
EARTH	2077-01-09 05:37	> 1 w	0.0724701	0.0712237	0.0770375
EARTH	2117-01-09 08:41	> 1 mo	0.0798289	0.0682279	0.8262167

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
60.78831180	6.66158848	0.07583399	MINIMUM
300.99105393	146.99503685	0.19744100	MINIMUM
0.40209472	258.02409760	0.58122082	SADDLE
358.98274193	74.45877373	1.42514361	SADDLE
180.52818199	74.74670389	1.66767714	SADDLE
179.27562301	254.23455758	3.63266331	MAXIMUM

Download:

MOID Plots

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