Asteroids

8014 1990MF help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.951

Aphelion (Q)

2.544

Eccentricity (e)

0.456

Inclination (i)

1.9

deg

Orbit period (P)

843.8

Earth MOID

0.01684

U parameter

0.0

A₂

-23.8

10^-15au/days²

Next Earth close approach

Date

2050-08-31

Nominal distance (from Earth center)

0.06035

9028790

Maximum Brightness

20.4

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

18.8

mag

Diameter

340

Taxonomic type

Scomp

Rotation period (T)

Discovery Information

Discovery Date

1990-06-26

Observatory

Palomar Mountain

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

1.747579

1-sigma variation

6.578E-9

Unit

Eccentricity (e)

Value

0.456006

1-sigma variation

7.521E-9

Unit

Inclination (i)

Value

1.8672

1-sigma variation

4.606E-7

Unit

Long. of Ascending Node (Ω)

Value

209.8237

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

114.7689

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

102.13908

1-sigma variation

4.318E-6

Unit

Perihelion distance

Value

0.950673

1-sigma variation

Unit

Aphelion distance

Value

2.544485

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.704072

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.167508

1-sigma variation

Unit

MOID

Value

0.016844

1-sigma variation

Unit

Orbit Period

Value

843.8275

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

A₂

Value

-23.77144

1-sigma variation

4.08330

Unit

10^-15au/days²

Covariance Matrix

	a	e	i	Ω	ω	M	A₂
a	4.32733E-17	1.13610E-17	-5.88413E-16	-1.63849E-15	-7.04510E-16	-2.75657E-14	2.58971E-8
e	1.13610E-17	5.65618E-17	-1.85597E-15	-1.39929E-13	1.49909E-13	-9.31868E-15	6.21714E-9
i	-5.88413E-16	-1.85597E-15	2.12120E-13	2.12965E-11	-2.10715E-11	2.26679E-13	-6.31100E-7
Ω	-1.63849E-15	-1.39929E-13	2.12965E-11	2.76399E-9	-2.76467E-9	-4.33360E-12	-2.07582E-5
ω	-7.04510E-16	1.49909E-13	-2.10715E-11	-2.76467E-9	2.77349E-9	2.98306E-12	1.66613E-5
M	-2.75657E-14	-9.31868E-15	2.26679E-13	-4.33360E-12	2.98306E-12	1.86410E-11	-1.54157E-5
A₂	2.58971E-8	6.21714E-9	-6.31100E-7	-2.07582E-5	1.66613E-5	-1.54157E-5	1.66733E1

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

Scomp

Unit

Source

[1]

Taxonomy (all)

Value

Unit

Source

[2]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

18.824

Unit

mag

Source

[3]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[3]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.433

Unit

Source

[4]

Diameter

Value

340

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

Radar R

Unit

Source

[5]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) Michaël Marsset et al 2022 AJ 163 165
[2]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[3]	ESA Aegis	ESA orbit determination and impact monitoring system
[4]	EARN	1.) Joseph R. Masiero et al 2021 Planet. Sci. J. 2 162
[5]	EARN	1.) href="http://echo.jpl.nasa.gov/asteroids/index.html">JPL's NEO Radar Detection Program Webpage 2.) Ostro, S.J. (1990) I.A.U. Circ. HREF="http://www.cbat.eps.harvard.edu/iauc/05000/05050.html"> 5050. (1990 MF - astrometric Radar data) 3.) Ostro, S.J. et al. (1991) Astron. J. 102, 1490-1502. (Asteroid radar astrometry)

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

12294

Unit

Source

[1]

Unobserved

Value

624

Unit

Source

[1]

Normalized RMS of residuals

Value

0.392239

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1990-06-14.54385

Unit

Source

[2]

Last Observation

Value

2024-02-10.567471

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

1271 (1)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

1990-07-04

Unit

Source

[3]

Last Observation

Value

2020-07-16

Unit

Source

[3]

Delay (Discarded)

Value

9 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

12 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

21 (0)

Unit

Source

[1]

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
[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 8014 1990MF 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	1957-12-20 00:12	< 1 min	0.0446246	0.0446218	0.0000009
EARTH	1960-07-16 12:47	< 1 min	0.0436760	0.0436745	0.0000005
EARTH	1983-10-12 00:15	< 1 min	0.1898852	0.1898846	0.0000002
EARTH	1990-07-10 12:03	< 1 s	0.0327921	0.0327921	0.0000000
MARS	2008-09-27 01:10	< 1 min	0.0219260	0.0219253	0.0000002
EARTH	2020-07-23 23:08	< 1 s	0.0546899	0.0546899	0.0000000
EARTH	2050-08-31 22:26	< 1 min	0.0603537	0.0603525	0.0000004
MARS	2059-07-14 10:22	< 1 min	0.0330732	0.0330712	0.0000007
EARTH	2080-09-12 10:54	< 1 min	0.0393207	0.0393198	0.0000003
MARS	2092-06-21 00:21	< 1 min	0.0466249	0.0466248	0.0000001
EARTH	2110-07-17 20:11	< 1 min	0.0419640	0.0419633	0.0000002

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
21.42928810	257.65398195	0.01692563	MINIMUM
336.45690109	184.75509832	0.03221929	MINIMUM
358.06549911	219.81350304	0.06827560	SADDLE
179.49924400	41.79178252	1.55660773	SADDLE
358.73516996	40.90762189	1.93807849	SADDLE
179.52798319	221.80332774	3.55541461	MAXIMUM

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MOID Plots

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