Asteroids

2018AF12

Last update: 2023-06-03 23:50 UTC

Orbital Properties

Epoch

60000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.434

Aphelion (Q)

2.639

Eccentricity (e)

0.718

Inclination (i)

13.0

deg

Orbit period (P)

695.7

Earth MOID

0.07574

U parameter

7.8

Next Earth close approach

Date

2037-01-09

Nominal distance (from Earth center)

0.07501

11220661

Maximum Brightness

118.8

mag

Risk

Object is not in risk list

Object is in priority list

Physical Properties

Absolute Magnitude (H)

21.8

mag

Diameter

160*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2018-01-14

Observatory

Mt. Lemmon Survey

Orbit Visualiser

Click the button to start Orbit Visualiser

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion
Aphelion
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period
U parameter

Value

1-sigma variation

Unit

Epoch

Value

60000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.536488

1-sigma variation

0.000988

Unit

Eccentricity (e)

Value

0.717801

1-sigma variation

0.000359

Unit

Inclination (i)

Value

13.0421

1-sigma variation

0.0134

Unit

Ascending Node (Ω)

Value

307.9654

1-sigma variation

0.0020

Unit

Arg. of Perihelion (ω)

Value

49.8911

1-sigma variation

0.0097

Unit

Mean Anomaly (M)

Value

283.01320

1-sigma variation

0.97452

Unit

Perihelion

Value

0.433596

1-sigma variation

Unit

Aphelion

Value

2.639381

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.506524

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.400673

1-sigma variation

Unit

MOID

Value

0.075737

1-sigma variation

Unit

Orbit Period

Value

695.6524

1-sigma variation

Unit

U parameter

Value

7.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	9.75751E-7	3.54338E-7	1.32265E-5	1.95808E-6	-9.51184E-6	-9.62628E-4
e	3.54338E-7	1.28779E-7	4.81023E-6	7.12146E-7	-3.46923E-6	-3.49571E-4
i	1.32265E-5	4.81023E-6	1.79818E-4	2.66112E-5	-1.29968E-4	-1.30486E-2
Ω	1.95808E-6	7.12146E-7	2.66112E-5	3.94353E-6	-1.92485E-5	-1.93174E-3
ω	-9.51184E-6	-3.46923E-6	-1.29968E-4	-1.92485E-5	9.49165E-5	9.38383E-3
M	-9.62628E-4	-3.49571E-4	-1.30486E-2	-1.93174E-3	9.38383E-3	9.49682E-1

Date of computation: 2023-05-08 23:51 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

21.795

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

[2]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

Unit

Source

[-]

Diameter

Value

160*

Unit

Source

[3]

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 ODIM	ESA orbit determination and impact monitoring system
[2]	NEODyS	NEO Dynamic Site: https://newton.spacedys.com/neodys2
[3]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved

Arc Information

Value

Unit

Source

Arc Length

Value

Unit

Source

[1]

Unobserved

Value

1937

Unit

Source

[1]

Astrometry Summary

RMS of Residuals
First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

RMS of Residuals

Value

0.500194

Unit

arcsec

Source

[1]

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

[3]

Last Observation

Value

Unit

Source

[3]

Delay (Discarded)

Value

0 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[1]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA ODIM	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net
[3]	JPL Radar Observations	Jet Propulsion Laboratory: https://ssd.jpl.nasa.gov/dat/radar_data_ast.txt

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 2123

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possibile distance in au	Distance uncert. in au
EARTH	1957-01-11 15:52	> 1 w	0.1038833	0.0809618	0.3662800
EARTH	1997-01-09 17:19	> 1 d	0.0789960	0.0778712	0.0206462
EARTH	2037-01-09 06:32	> 1 d	0.0750055	0.0748700	0.0067249
EARTH	2077-01-09 05:41	> 1 w	0.0724589	0.0712238	0.0767026
EARTH	2117-01-09 08:55	> 1 mo	0.0797089	0.0682287	0.8234806

Download as: