Asteroids

2020TD8 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.916

Aphelion (Q)

1.768

Eccentricity (e)

0.317

Inclination (i)

6.2

deg

Orbit period (P)

568.0

Earth MOID

0.00056

U parameter

6.2

Next Earth close approach

Date

2034-10-23

Nominal distance (from Earth center)

0.03644

5450902

Maximum Brightness

22.3

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

26.9

mag

Diameter

11 - 25*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2020-10-15

Observatory

Pan-STARRS 2, 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

1.342214

1-sigma variation

0.000075

Unit

Eccentricity (e)

Value

0.317385

1-sigma variation

0.000043

Unit

Inclination (i)

Value

6.1551

1-sigma variation

0.0006

Unit

Long. of Ascending Node (Ω)

Value

214.8905

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

227.1331

1-sigma variation

0.0008

Unit

Mean Anomaly (M)

Value

68.23055

1-sigma variation

0.09678

Unit

Perihelion distance

Value

0.916215

1-sigma variation

Unit

Aphelion distance

Value

1.768212

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.532019

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.001068

1-sigma variation

Unit

MOID

Value

0.000555

1-sigma variation

Unit

Orbit Period

Value

567.9772

1-sigma variation

Unit

U parameter

Value

6.2

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	5.68251E-9	3.21257E-9	4.83854E-8	4.66475E-9	-5.89580E-8	-7.29561E-6
e	3.21257E-9	1.81622E-9	2.73549E-8	2.63700E-9	-3.33280E-8	-4.12453E-6
i	4.83854E-8	2.73549E-8	4.12042E-7	3.96988E-8	-5.01788E-7	-6.21207E-5
Ω	4.66475E-9	2.63700E-9	3.96988E-8	3.84032E-9	-4.84771E-8	-5.98891E-6
ω	-5.89580E-8	-3.33280E-8	-5.01788E-7	-4.84771E-8	6.13074E-7	7.56940E-5
M	-7.29561E-6	-4.12453E-6	-6.21207E-5	-5.98891E-6	7.56940E-5	9.36663E-3

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

26.873

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

11 - 25*

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

1795

Unit

Source

[1]

Normalized RMS of residuals

Value

0.585713

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2020-10-15.322434

Unit

Source

[2]

Last Observation

Value

2020-10-27.035254

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

82 (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 2020TD8 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	1958-10-29 02:55	465.4	0.0052957	0.0015272	0.0017394
EARTH	1985-11-24 21:46	> 1 d	0.0802341	0.0569069	0.0082743
EARTH	1993-10-09 19:07	1099.4	0.1939086	0.1503353	0.0145332
EARTH	2013-01-26 11:51	830.1	0.1066324	0.1045816	0.0008804
EARTH	2020-10-27 08:39	< 1 s	0.0041445	0.0041430	0.0000005
EARTH	2034-10-23 14:36	1176.3	0.0364370	0.0149695	0.0071623
EARTH	2052-02-05 18:25	> 1 d	0.1204789	0.1062637	0.0195469
EARTH	2065-11-24 16:06	> 1 w	0.0832604	0.0347497	0.0409014
EARTH	2079-10-20 14:31	> 1 d	0.0710816	0.0027997	0.0547791
EARTH	2097-01-28 14:50	> 1 w	0.1057543	0.1054862	0.0064616
EARTH	2110-11-01 19:48	> 1 mo	0.0162228	0.0006700	0.2370527
EARTH	2124-12-28 05:42	> 1 mo	0.1081313	0.1071321	0.4280573

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
324.99376162	293.34289883	0.00042521	MINIMUM
31.35129222	22.03320689	0.10552498	MINIMUM
14.29902197	359.45551126	0.10881880	SADDLE
180.77515517	160.00739500	0.76031853	SADDLE
359.41719195	159.19315766	1.92999669	SADDLE
179.08419924	338.78494548	2.75097360	MAXIMUM

Download:

MOID Plots

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

Level lines of the squared distance function

2020TD8

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS	TS
2096-10-27.894	86908.894	1.318	0.000	1.43 ± 0.000	7.74E5	4.96E-7	7.48E-2	-7.54	0


Based on 82 optical observations (of which 0 are rejected as outliers) from 2020/10/15.322 to 2020/10/27.035.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.81 and 1.81 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
AstOD software version= 4.0, Date of computation=20250805 130500.123 UTC.

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Download Impactor Table as: