Asteroids

2020OY4 help

Last update: 2025年03月28日 16:24 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.625

Aphelion (Q)

1.415

Eccentricity (e)

0.387

Inclination (i)

3.6

deg

Orbit period (P)

376.1

Earth MOID

0.00008

U parameter

6.4

Next Earth close approach

Date

2028年03月05日

Nominal distance (from Earth center)

0.16827

25172989

Maximum Brightness

28.7

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

30.1

mag

Diameter

2.5 - 6*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2020年07月26日

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

1.019687

1-sigma variation

0.000047

Unit

Eccentricity (e)

Value

0.387272

1-sigma variation

0.000034

Unit

Inclination (i)

Value

3.5943

1-sigma variation

0.0001

Unit

Long. of Ascending Node (Ω)

Value

305.3660

1-sigma variation

4.106E-5

Unit

Arg. of Perihelion (ω)

Value

112.1418

1-sigma variation

0.0043

Unit

Mean Anomaly (M)

Value

160.35243

1-sigma variation

0.10913

Unit

Perihelion distance

Value

0.624790

1-sigma variation

Unit

Aphelion distance

Value

1.414583

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.000548

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.228289

1-sigma variation

Unit

MOID

Value

0.000083

1-sigma variation

Unit

Orbit Period

Value

376.0959

1-sigma variation

Unit

U parameter

Value

6.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.22336E-9	1.59632E-9	-2.35345E-9	1.92238E-9	-2.02602E-7	-5.14558E-6
e	1.59632E-9	1.14923E-9	-1.63897E-9	1.37244E-9	-1.45259E-7	-3.69424E-6
i	-2.35345E-9	-1.63897E-9	3.44934E-9	-2.16237E-9	2.17808E-7	5.44966E-6
Ω	1.92238E-9	1.37244E-9	-2.16237E-9	1.68558E-9	-1.75692E-7	-4.44948E-6
ω	-2.02602E-7	-1.45259E-7	2.17808E-7	-1.75692E-7	1.84755E-5	4.68900E-4
M	-5.14558E-6	-3.69424E-6	5.44966E-6	-4.44948E-6	4.68900E-4	1.19086E-2

Date of computation: 2025年02月19日 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

30.094

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

2.5 - 6*

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

[-]

Download this part as:

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

1705

Unit

Source

[1]

Normalized RMS of residuals

Value

0.535107

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2020年07月26日.34008

Unit

Source

[2]

Last Observation

Value

2020年07月28日.103613

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

68 (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 2020OY4 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	1951年08月16日 11:19	> 1 w	0.1818899	0.0099506	0.0884166
EARTH	1953年02月16日 09:22	> 1 d	0.1784019	0.0071614	0.0876212
VENUS	1968年06月07日 09:21	> 1 w	0.0399176	0.0107589	0.0598856
EARTH	1970年08月04日 11:43	> 1 d	0.1244842	0.0019768	0.0829477
EARTH	1972年02月14日 04:28	> 1 d	0.1132759	0.0086670	0.0815728
VENUS	1985年01月20日 09:57	> 1 w	0.0273777	0.0148806	0.0244161
EARTH	1989年07月28日 13:12	337.5	0.0133244	0.0022118	0.0037543
EARTH	1991年02月09日 07:45	415.4	0.0285404	0.0126189	0.0056535
VENUS	2002年12月01日 12:49	706.6	0.0400776	0.0264732	0.0047872
EARTH	2020年07月28日 05:29	< 1 s	0.0002774	0.0002773	0.0000000
EARTH	2021年07月26日 15:25	63.6	0.1758962	0.1746167	0.0004265
EARTH	2028年03月05日 01:00	341.3	0.1682710	0.1593481	0.0029787
EARTH	2029年03月07日 03:08	185.5	0.0450969	0.0415909	0.0015434
EARTH	2054年07月23日 22:59	949.5	0.1287619	0.0781799	0.0168607
EARTH	2055年07月30日 13:59	624.8	0.0469663	0.0005605	0.0172974
VENUS	2062年01月09日 17:38	432.8	0.0308660	0.0236831	0.0025937
EARTH	2063年03月03日 23:00	84.6	0.1073377	0.1047103	0.0008767
EARTH	2064年03月09日 18:49	146.5	0.0995644	0.0885228	0.0037323
EARTH	2088年07月27日 14:40	> 1 d	0.0288847	0.0009613	0.0643078
EARTH	2089年07月29日 23:02	> 1 d	0.1463453	0.0250189	0.0404675
EARTH	2097年03月05日 16:50	> 1 d	0.0522777	0.0409680	0.0792232
EARTH	2098年03月13日 00:43	> 1 d	0.1507313	0.0419529	0.1453925
VENUS	2103年03月28日 17:31	> 1 w	0.0199297	0.0187590	0.0902799
EARTH	2123年07月25日 20:28	> 1 mo	0.1190059	0.0010469	1.5730866
EARTH	2124年07月31日 08:02	> 1 mo	0.0583851	0.0012842	1.5746221

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
270.64999818	203.85694441	0.00011302	MINIMUM
85.14636402	62.95322939	0.04055502	MINIMUM
356.83023906	312.06477565	0.36597916	SADDLE
178.36870347	134.10681710	0.40900152	SADDLE
357.13001225	132.53422428	1.63553956	SADDLE
178.91731075	314.48694707	2.40115542	MAXIMUM

Download:

MOID Plots

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

Level lines of the squared distance functionAsteroid orbit