Asteroids

2020MA1 help

Last update: 2025-04-05 00:04 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Aten

Perihelion (q)

0.707

Aphelion (Q)

1.070

Eccentricity (e)

0.204

Inclination (i)

4.9

deg

Orbit period (P)

305.8

Earth MOID

0.03545

U parameter

9.0

Next Earth close approach

Date

2025-07-21

Nominal distance (from Earth center)

0.05772

8635102

Maximum Brightness

20.5

mag

Risk

Object is in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

25.3

mag

Diameter

23 - 50*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2020-06-21

Observatory

Pan-STARRS 1, Haleakala

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

0.888280

1-sigma variation

0.002000

Unit

Eccentricity (e)

Value

0.204168

1-sigma variation

0.001622

Unit

Inclination (i)

Value

4.9185

1-sigma variation

0.0013

Unit

Long. of Ascending Node (Ω)

Value

101.8325

1-sigma variation

0.0815

Unit

Arg. of Perihelion (ω)

Value

9.9501

1-sigma variation

0.4785

Unit

Mean Anomaly (M)

Value

99.20563

1-sigma variation

0.31791

Unit

Perihelion distance

Value

0.706921

1-sigma variation

Unit

Aphelion distance

Value

1.069638

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.274890

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.049176

1-sigma variation

Unit

MOID

Value

0.035453

1-sigma variation

Unit

Orbit Period

Value

305.7898

1-sigma variation

Unit

U parameter

Value

9.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.99919E-6	3.24356E-6	2.50763E-6	-1.62885E-4	9.56902E-4	-6.35751E-4
e	3.24356E-6	2.63071E-6	2.03384E-6	-1.32108E-4	7.76100E-4	-5.15629E-4
i	2.50763E-6	2.03384E-6	1.57697E-6	-1.02147E-4	6.00022E-4	-3.98638E-4
Ω	-1.62885E-4	-1.32108E-4	-1.02147E-4	6.63422E-3	-3.89740E-2	2.58937E-2
ω	9.56902E-4	7.76100E-4	6.00022E-4	-3.89740E-2	2.28962E-1	-1.52118E-1
M	-6.35751E-4	-5.15629E-4	-3.98638E-4	2.58937E-2	-1.52118E-1	1.01065E-1

Date of computation: 2025-02-19 13:28 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

25.337

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

23 - 50*

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

[-]

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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

1744

Unit

Source

[1]

Normalized RMS of residuals

Value

0.702806

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2020-06-11.263774

Unit

Source

[2]

Last Observation

Value

2020-06-26.30338

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

29 (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 2020MA1 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	1952-08-22 17:17	931.6	0.1602496	0.0818325	0.0290893
VENUS	1953-09-16 13:55	> 1 w	0.0248248	0.0247630	0.0013853
VENUS	1970-05-02 01:36	> 1 w	0.0244940	0.0241372	0.0015702
EARTH	1976-06-05 16:53	331.9	0.1570259	0.1222613	0.0117101
EARTH	1981-06-06 20:19	146.1	0.0669836	0.0563069	0.0037206
EARTH	1986-06-15 14:55	> 1 d	0.0333508	0.0332435	0.0003142
VENUS	1986-12-20 22:04	> 1 d	0.0189030	0.0102192	0.0032026
EARTH	1991-07-13 20:51	> 1 d	0.0469971	0.0447954	0.0009088
EARTH	1996-08-13 01:55	193.9	0.0580073	0.0579713	0.0000163
EARTH	2001-08-20 16:52	249.8	0.1508330	0.1373350	0.0045442
VENUS	2003-07-07 22:51	> 1 d	0.0285243	0.0253948	0.0032111
EARTH	2015-06-06 17:46	81.4	0.1616419	0.1490660	0.0042031
EARTH	2020-06-13 06:55	< 1 min	0.0337672	0.0336607	0.0000355
VENUS	2025-02-26 21:59	> 1 d	0.0104403	0.0005472	0.0043249
EARTH	2025-07-21 04:07	427.3	0.0577221	0.0472176	0.0036350
EARTH	2030-06-10 04:43	> 1 w	0.0377137	0.0355701	0.0284076
VENUS	2034-04-08 19:01	> 1 mo	0.0404363	0.0244321	0.2234471
EARTH	2035-06-05 16:26	> 1 d	0.1659327	0.0436143	0.2010650
VENUS	2055-04-01 20:01	> 1 mo	0.0172296	0.0115749	0.1032692
EARTH	2056-08-22 08:40	> 1 w	0.1090464	0.0589442	0.1578983
EARTH	2061-08-18 01:10	> 1 mo	0.0696470	0.0633423	0.1551584
EARTH	2066-08-11 12:55	> 1 mo	0.0603461	0.0593357	0.1501723
VENUS	2066-11-29 12:28	> 1 mo	0.0211856	0.0206479	0.1544789
EARTH	2071-08-16 18:35	> 1 mo	0.0682852	0.0611809	1.3672241
EARTH	2076-08-20 23:34	> 1 mo	0.1004393	0.0650096	4.3315580
EARTH	2081-08-21 02:44	> 1 w	0.1765813	0.0680387	5.4417907
VENUS	2100-03-23 11:23	> 1 mo	0.0280645	0.0039525	23.4556625
EARTH	2100-06-07 10:29	> 1 mo	0.1981009	0.0416324	19.2616151
EARTH	2105-06-07 04:14	> 1 mo	0.1783657	0.0401377	69.6420386
EARTH	2110-06-07 07:58	> 1 mo	0.1707054	0.0400547	149.6207770
EARTH	2115-06-07 11:05	> 1 mo	0.1580799	0.0403763	150.7787961
EARTH	2120-06-06 21:03	> 1 mo	0.1693846	0.0418181	68.0276331
EARTH	2125-06-07 14:34	> 1 mo	0.1894168	0.0348592	24.4291755

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
149.95892802	164.14970957	0.03111401	MINIMUM
2.97642586	12.37109891	0.27725502	SADDLE
1.47883005	190.57642053	1.72237680	SADDLE
180.57979917	9.65219243	2.04239611	MAXIMUM

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MOID Plots

Click on the images to zoom-in and zoom-out

Level lines of the squared distance function

2020MA1

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS	TS
2101-07-06.611	88620.611	-2.937	0.000	1.00 ± 0.000	1.67E8	1.93E-10	9.07E-11	-10.33	0


Based on 29 optical observations (of which 0 are rejected as outliers) from 2020/06/11.264 to 2020/06/26.303.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 3.17 and 3.17 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
AstOD software version= 4.0, Date of computation=20250305 085320.450 UTC.

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Download Impactor Table as: