Asteroids

2020TH1 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Amor

Perihelion (q)

1.048

Aphelion (Q)

1.319

Eccentricity (e)

0.115

Inclination (i)

26.2

deg

Orbit period (P)

470.1

Earth MOID

0.11391

U parameter

8.4

Next Earth close approach

Date

2029-10-11

Nominal distance (from Earth center)

0.12167

18202261

Maximum Brightness

21.1

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

24.7

mag

Diameter

30 - 70*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2020-10-07

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.183161

1-sigma variation

0.001589

Unit

Eccentricity (e)

Value

0.114518

1-sigma variation

0.000696

Unit

Inclination (i)

Value

26.2299

1-sigma variation

0.0862

Unit

Long. of Ascending Node (Ω)

Value

195.9359

1-sigma variation

0.0042

Unit

Arg. of Perihelion (ω)

Value

245.8605

1-sigma variation

0.3291

Unit

Mean Anomaly (M)

Value

298.04817

1-sigma variation

2.53536

Unit

Perihelion distance

Value

1.047667

1-sigma variation

Unit

Aphelion distance

Value

1.318655

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.223072

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.116241

1-sigma variation

Unit

MOID

Value

0.113913

1-sigma variation

Unit

Orbit Period

Value

470.0718

1-sigma variation

Unit

U parameter

Value

8.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.52491E-6	1.10444E-6	1.36995E-4	6.73584E-6	-5.22095E-4	-4.02863E-3
e	1.10444E-6	4.85051E-7	5.99549E-5	2.94797E-6	-2.27589E-4	-1.76271E-3
i	1.36995E-4	5.99549E-5	7.43381E-3	3.65510E-4	-2.83143E-2	-2.18591E-1
Ω	6.73584E-6	2.94797E-6	3.65510E-4	1.79717E-5	-1.39215E-3	-1.07478E-2
ω	-5.22095E-4	-2.27589E-4	-2.83143E-2	-1.39215E-3	1.08276E-1	8.32823E-1
M	-4.02863E-3	-1.76271E-3	-2.18591E-1	-1.07478E-2	8.32823E-1	6.42803E0

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

24.667

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

[-]

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

1854

Unit

Source

[1]

Normalized RMS of residuals

Value

0.646293

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2020-10-07.431956

Unit

Source

[2]

Last Observation

Value

2020-10-10.453987

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

31 (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 2020TH1 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	2002-10-11 20:43	1200.1	0.1671091	0.1172011	0.1610374
EARTH	2011-10-12 06:39	135.4	0.1302543	0.1147900	0.0520074
EARTH	2020-10-11 12:43	2.2	0.1145569	0.1134224	0.0003781
EARTH	2029-10-11 13:52	942.4	0.1216746	0.1145106	0.0370199
EARTH	2038-10-11 10:05	> 1 d	0.1523846	0.1174445	0.1455714
EARTH	2114-10-13 05:36	> 1 d	0.1635285	0.1177254	0.5454130
EARTH	2123-10-13 15:29	303.5	0.1285669	0.1154287	0.3482444

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
302.64775829	277.03571488	0.11438418	MINIMUM
101.44646874	87.24571260	0.21762153	MINIMUM
23.56906675	6.04793911	0.46883923	SADDLE
202.02424992	178.70463297	0.59801929	SADDLE
10.34255408	169.93683722	2.01481991	SADDLE
152.32940094	311.18075519	2.26790539	MAXIMUM

Download:

MOID Plots

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