Asteroids

2020PT4 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.813

Aphelion (Q)

2.376

Eccentricity (e)

0.490

Inclination (i)

4.0

deg

Orbit period (P)

735.3

Earth MOID

0.00500

U parameter

0.0

Next Earth close approach

Date

2026-10-18

Nominal distance (from Earth center)

0.16161

24176042

Maximum Brightness

28.3

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

24.8

mag

Diameter

29 - 70*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2020-08-13

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.594269

1-sigma variation

5.036E-9

Unit

Eccentricity (e)

Value

0.490085

1-sigma variation

2.745E-7

Unit

Inclination (i)

Value

3.9693

1-sigma variation

6.391E-6

Unit

Long. of Ascending Node (Ω)

Value

163.0083

1-sigma variation

1.314E-5

Unit

Arg. of Perihelion (ω)

Value

249.8269

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

187.64449

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.812941

1-sigma variation

Unit

Aphelion distance

Value

2.375598

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.465209

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.027442

1-sigma variation

Unit

MOID

Value

0.005003

1-sigma variation

Unit

Orbit Period

Value

735.2601

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.53641E-17	5.70470E-17	6.14014E-15	-2.77064E-15	3.64686E-14	-3.78694E-14
e	5.70470E-17	7.53368E-14	1.69448E-13	1.31201E-12	1.38474E-11	-2.33779E-12
i	6.14014E-15	1.69448E-13	4.08441E-11	-2.29866E-11	6.73730E-11	-1.65312E-11
Ω	-2.77064E-15	1.31201E-12	-2.29866E-11	1.72771E-10	8.08960E-11	-3.11730E-11
ω	3.64686E-14	1.38474E-11	6.73730E-11	8.08960E-11	2.75318E-9	-4.78070E-10
M	-3.78694E-14	-2.33779E-12	-1.65312E-11	-3.11730E-11	-4.78070E-10	1.27260E-10

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

Unit

Source

[-]

Taxonomy (all)

Value

Unit

Source

[-]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

24.785

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

29 - 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

[-]

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

747

Unit

Source

[1]

Unobserved

Value

1146

Unit

Source

[1]

Normalized RMS of residuals

Value

0.579773

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2020-08-13.408726

Unit

Source

[2]

Last Observation

Value

2022-08-30.336141

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

47 (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 2020PT4 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	2000-12-18 20:41	< 1 min	0.0289701	0.0289613	0.0000029
EARTH	2018-08-30 15:18	< 1 min	0.1386461	0.1386454	0.0000002
EARTH	2020-09-08 15:51	< 1 s	0.0126536	0.0126534	0.0000001
EARTH	2022-09-15 13:38	< 1 min	0.0480581	0.0480578	0.0000001
EARTH	2024-09-28 12:41	< 1 min	0.1150995	0.1150989	0.0000002
EARTH	2026-10-18 11:50	< 1 min	0.1616069	0.1616061	0.0000002
EARTH	2028-11-05 16:14	< 1 min	0.1833414	0.1833403	0.0000003
EARTH	2030-11-25 06:35	< 1 min	0.1824322	0.1824307	0.0000005
EARTH	2032-12-14 14:48	< 1 min	0.1555155	0.1555131	0.0000008
EARTH	2035-01-03 17:05	< 1 min	0.1040052	0.1040020	0.0000011
EARTH	2037-01-14 12:27	< 1 min	0.0524342	0.0524333	0.0000003
EARTH	2039-01-21 12:57	< 1 min	0.0825218	0.0825175	0.0000014
EARTH	2041-01-26 16:51	< 1 min	0.1623979	0.1623921	0.0000019

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
318.64031591	245.76417490	0.00516431	MINIMUM
39.29673074	13.24942527	0.05049360	MINIMUM
359.35437972	310.31984668	0.18585845	SADDLE
179.57747721	130.00195547	1.36882771	SADDLE
358.48303508	128.86470190	1.82213856	SADDLE
179.42071609	309.91606158	3.36346319	MAXIMUM

Download:

MOID Plots

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