Asteroids

2020HY help

Last update: 2026-04-18 12:45 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Aten

Perihelion (q)

0.402

Aphelion (Q)

1.395

Eccentricity (e)

0.553

Inclination (i)

18.3

deg

Orbit period (P)

311.2

Earth MOID

0.01190

U parameter

1.8

Next Earth close approach

Date

2037-04-19

Nominal distance (from Earth center)

0.15421

23069706

Maximum Brightness

22.4

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

22.8

mag

Diameter

70 - 170*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2020-04-17

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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.898812

1-sigma variation

3.439E-8

Unit

Eccentricity (e)

Value

0.552508

1-sigma variation

1.232E-7

Unit

Inclination (i)

Value

18.2689

1-sigma variation

6.933E-6

Unit

Long. of Ascending Node (Ω)

Value

207.1298

1-sigma variation

6.046E-6

Unit

Arg. of Perihelion (ω)

Value

224.5145

1-sigma variation

9.305E-6

Unit

Mean Anomaly (M)

Value

156.28732

1-sigma variation

0.00015

Unit

Perihelion distance

Value

0.402211

1-sigma variation

Unit

Aphelion distance

Value

1.395413

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.026921

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.548305

1-sigma variation

Unit

MOID

Value

0.011895

1-sigma variation

Unit

Orbit Period

Value

311.2443

1-sigma variation

Unit

U parameter

Value

1.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.18251E-15	-3.78749E-15	-1.30189E-14	2.59480E-14	2.37980E-13	-5.10987E-12
e	-3.78749E-15	1.51839E-14	1.05526E-13	-7.06582E-14	-8.12226E-13	1.60484E-11
i	-1.30189E-14	1.05526E-13	4.80688E-11	2.27588E-11	-1.97708E-11	3.59145E-11
Ω	2.59480E-14	-7.06582E-14	2.27588E-11	3.65543E-11	-1.09365E-11	-1.61043E-10
ω	2.37980E-13	-8.12226E-13	-1.97708E-11	-1.09365E-11	8.65913E-11	-1.07626E-9
M	-5.10987E-12	1.60484E-11	3.59145E-11	-1.61043E-10	-1.07626E-9	2.23688E-8

Date of computation: 2026-04-18 12:45 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

22.77

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

70 - 170*

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

2201

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.628091

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2020-04-08.858631

Unit

Source

[2]

Last Observation

Value

2026-04-18.438518

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

110 (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

Note: Ephemerides requests are limited to a maximum of 1000 points and a final date not exceeding 2040/12/31 00:00.

Close Approaches for 2020HY from 1950 to 2126

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1951-04-14 21:41	< 1 min	0.1283004	0.1282831	0.0000057
EARTH	1968-04-15 17:51	< 1 min	0.0403990	0.0403958	0.0000011
EARTH	1974-04-15 15:47	< 1 min	0.1645645	0.1645559	0.0000029
EARTH	1991-04-16 18:04	< 1 min	0.0455791	0.0455547	0.0000081
EARTH	1997-04-14 23:07	< 1 min	0.1467706	0.1467511	0.0000065
EARTH	2014-04-18 06:14	< 1 min	0.1004881	0.1004824	0.0000019
EARTH	2020-04-14 03:33	< 1 s	0.0919810	0.0919806	0.0000001
EARTH	2037-04-19 22:49	< 1 min	0.1542115	0.1541945	0.0000056
EARTH	2043-04-15 06:26	< 1 min	0.0446998	0.0446788	0.0000070
EARTH	2060-04-20 05:22	< 1 min	0.1655202	0.1655058	0.0000048
EARTH	2066-04-15 02:13	< 1 min	0.0474613	0.0474509	0.0000035
EARTH	2083-04-19 16:27	< 1 min	0.1261258	0.1261169	0.0000030
EARTH	2089-04-14 16:59	< 1 min	0.0958576	0.0958430	0.0000049
EARTH	2106-04-18 17:46	< 1 min	0.0690662	0.0690362	0.0000100
EARTH	2112-04-16 03:46	< 1 min	0.1457153	0.1456878	0.0000092

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
102.73576060	99.95625689	0.01189529	MINIMUM
264.51745472	199.95461215	0.31693688	MINIMUM
190.49577769	151.07678945	0.47049660	SADDLE
5.93787787	337.79175540	0.60280494	SADDLE
1.30361978	149.44811091	1.40906592	SADDLE
177.59145311	324.06824238	2.36806839	MAXIMUM

Download:

MOID Plots

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