Asteroids

2020YG2 help

Last update: 2025-04-09 07:59 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.922

Aphelion (Q)

4.077

Eccentricity (e)

0.631

Inclination (i)

0.7

deg

Orbit period (P)

1443.4

Earth MOID

0.00375

U parameter

7.5

Next Earth close approach

Date

2084-09-27

Nominal distance (from Earth center)

0.13334

19948102

Maximum Brightness

22.6

mag

Risk

Object is in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

24.7

mag

Diameter

30 - 70*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2020-12-20

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

2.499572

1-sigma variation

0.001674

Unit

Eccentricity (e)

Value

0.631245

1-sigma variation

0.000324

Unit

Inclination (i)

Value

0.7192

1-sigma variation

0.0013

Unit

Long. of Ascending Node (Ω)

Value

204.9492

1-sigma variation

0.0079

Unit

Arg. of Perihelion (ω)

Value

199.9087

1-sigma variation

0.0301

Unit

Mean Anomaly (M)

Value

46.07906

1-sigma variation

1.04326

Unit

Perihelion distance

Value

0.921731

1-sigma variation

Unit

Aphelion distance

Value

4.077414

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

2.698634

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.052740

1-sigma variation

Unit

MOID

Value

0.003750

1-sigma variation

Unit

Orbit Period

Value

1443.4343

1-sigma variation

Unit

U parameter

Value

7.5

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.80381E-6	5.42085E-7	-2.17804E-6	1.31813E-5	5.03862E-5	-1.74689E-3
e	5.42085E-7	1.04806E-7	-4.21099E-7	2.54862E-6	9.74140E-6	-3.37742E-4
i	-2.17804E-6	-4.21099E-7	1.69196E-6	-1.02341E-5	-3.91462E-5	1.35701E-3
Ω	1.31813E-5	2.54862E-6	-1.02341E-5	6.30208E-5	2.35757E-4	-8.21251E-3
ω	5.03862E-5	9.74140E-6	-3.91462E-5	2.35757E-4	9.06672E-4	-3.13927E-2
M	-1.74689E-3	-3.37742E-4	1.35701E-3	-8.21251E-3	-3.13927E-2	1.08839E0

Date of computation: 2025-04-09 07:59 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

24.677

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

30 - 70*

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

1614

Unit

Source

[1]

Normalized RMS of residuals

Value

0.416606

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2020-12-20.19277

Unit

Source

[2]

Last Observation

Value

2021-01-12.541333

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

54 (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 2020YG2 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	1981-09-14 09:30	> 1 mo	0.0381508	0.0061193	0.5013366
EARTH	2020-12-17 14:18	< 1 min	0.0529828	0.0528337	0.0000497
EARTH	2024-10-13 09:44	> 1 w	0.0452266	0.0049018	0.0355667
88 Thisbe	2032-03-21 03:15	> 1 d	0.0199527	0.0120616	0.0560639
EARTH	2084-09-27 20:33	> 1 w	0.1333448	0.0010670	0.2249710
EARTH	2088-10-20 18:39	> 1 mo	0.0139146	0.0020807	0.0888607
EARTH	2092-10-27 14:52	> 1 mo	0.0107129	0.0041606	0.1264868
EARTH	2096-10-16 00:03	> 1 mo	0.0344357	0.0022738	0.9739111
EARTH	2100-09-25 02:53	> 1 mo	0.1881948	0.0000600	0.9017214

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
341.82795699	266.85784943	0.00373722	MINIMUM
16.11143633	336.58394467	0.00980247	MINIMUM
358.94988869	301.73827576	0.06877866	SADDLE
358.88503438	121.61916366	1.93043472	SADDLE
179.75151272	122.73357381	3.06588241	SADDLE
179.75425350	302.73859214	5.06499157	MAXIMUM

Download:

MOID Plots

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

Level lines of the squared distance function

2020YG2

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS	TS
2109-10-15.402	91643.402	3.447	0.000	1.55 ± 0.008	8.67E5	4.91E-10	9.82E-10	-9.47	0


Based on 54 optical observations (of which 0 are rejected as outliers) from 2020/12/20.193 to 2021/01/12.541.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.56 and 1.56 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
AstOD software version= 4.0, Date of computation=20250305 083250.882 UTC.

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Download Impactor Table as: