Asteroids

2020AD1

Last update: 2021-05-10 03:03 UTC

Orbital Properties

Epoch

59400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.897

Aphelion (Q)

1.204

Eccentricity (e)

0.146

Inclination (i)

3.8

deg

Orbit period (P)

393.2

days

Earth MOID

0.0043

Next Earth close approach

Date

2021-07-04

Nominal distance (from Earth center)

0.00726

1086116

Maximum Brightness

18.4

Orbit Visualiser

Click the button to start Orbit Visualiser

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

26.2

Diameter

20*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2020-01-04

Observatory

Mt. Lemmon Survey

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion
Aphelion
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period

Value

1-sigma variation

Unit

Epoch

Value

59400.0

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.05

1-sigma variation

8.11268E-5

Unit

Eccentricity (e)

Value

0.145910372854227

1-sigma variation

1.10398E-5

Unit

Inclination (i)

Value

3.77

1-sigma variation

5.278E-3

Unit

Ascending Node (Ω)

Value

98.49

1-sigma variation

4.217E-3

Unit

Arg. of Perihelion (ω)

Value

98.35

1-sigma variation

3.261E-2

Unit

Mean Anomaly (M)

Value

69.28

1-sigma variation

1.999E-2

Unit

Perihelion

Value

8.971E-1

1-sigma variation

Unit

Aphelion

Value

1.2

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

6.604E-2

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-1.014E-2

1-sigma variation

Unit

MOID

Value

4.296E-3

1-sigma variation

Unit

Orbit Period

Value

393.16

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	6.58156E-9	8.89903E-10	-4.28137E-7	-3.42110E-7	2.64569E-6	-1.62135E-6
e	8.89903E-10	1.21877E-10	-5.78384E-8	-4.62264E-8	3.57672E-7	-2.19369E-7
i	-4.28137E-7	-5.78384E-8	2.78526E-5	2.22559E-5	-1.72106E-4	1.05465E-4
Ω	-3.42110E-7	-4.62264E-8	2.22559E-5	1.77840E-5	-1.37525E-4	8.42750E-5
ω	2.64569E-6	3.57672E-7	-1.72106E-4	-1.37525E-4	1.06353E-3	-6.51753E-4
M	-1.62135E-6	-2.19369E-7	1.05465E-4	8.42750E-5	-6.51753E-4	3.99429E-4

Date of computation: 2021-04-29 04:48 UTC

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)

Taxononomy

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

26.221

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

Unit

Source

[-]

Diameter

Value

20*

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

[-]

Sources

No.	Name	Additional
[1]	ESA ODIM	ESA orbit determination and impact monitoring system
[2]	Estimation	Estimated from absolute magnitude

**Estimated value

Observational Information

Arc Length
Unobserved

Arc Information

Value

Unit

Source

Arc Length

Value

Unit

days

Source

[1]

Unobserved

Value

478

Unit

days

Source

[1]

Astrometry Summary

RMS of Residuals
First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

RMS of Residuals

Value

0.517212

Unit

arcseconds

Source

[1]

First Observation

Value

2019-12-28.540275

Unit

Source

[2]

Last Observation

Value

2020-01-18.083376

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

46 (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

[3]

Last Observation

Value

Unit

Source

[3]

Delay (Discarded)

Value

0 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[1]

Note: The ASCII file is in a format suitable for OrbFit input.

Sources

No.	Name	Additional
[1]	ESA ODIM	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net
[3]	JPL Radar Observations	Jet Propulsion Laboratory: https://ssd.jpl.nasa.gov/dat/radar_data_ast.txt

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 2020AD1 from 1950 to 2150

Body	Date	MJD	Nominal distance (au)	Min possible distance (au)	Stretching (au)	Width (au)	Close approach probability
EARTH	1956-01-18.82953	35490.8	0.1351761	0.0293821	2.504E-1	2.454E-7	2.65E-1
EARTH	1957-07-03.12404	36022.1	0.0097886	0.0035097	3.398E-2	1.599E-7	1.00E0
EARTH	1971-12-17.33563	41302.3	0.1327043	0.0190171	2.478E-2	1.648E-7	9.93E-1
EARTH	1972-03-20.99869	41397.0	0.1168728	0.0890703	8.276E-3	2.546E-7	1.00E0
EARTH	1972-09-10.31740	41570.3	0.1893811	0.1590408	9.492E-3	3.135E-7	6.90E-1
EARTH	1973-07-13.88787	41876.9	0.1709734	0.0030335	3.162E-2	8.466E-8	6.53E-1
EARTH	1987-01-16.71241	46811.7	0.0618006	0.0597510	8.018E-4	3.602E-7	1.00E0
EARTH	1988-06-29.89564	47341.9	0.0347339	0.0187055	4.151E-3	2.427E-7	1.00E0
EARTH	2003-12-05.27829	52978.3	0.1508707	0.1441553	2.547E-3	2.629E-7	1.00E0
EARTH	2004-04-02.78351	53097.8	0.1230006	0.1221656	4.842E-4	4.662E-7	1.00E0
EARTH	2004-09-04.98281	53253.0	0.1804762	0.1757681	1.590E-3	3.036E-7	1.00E0
EARTH	2005-07-14.05443	53565.1	0.1692078	0.1554614	4.400E-3	1.048E-7	1.00E0
EARTH	2020-01-17.88568	58865.9	0.0233429	0.0233104	1.084E-5	2.235E-8	1.00E0
EARTH	2021-07-04.34444	59399.3	0.0072602	0.0068855	1.500E-4	1.927E-7	1.00E0
EARTH	2033-12-08.73416	63939.7	0.1593818	0.1500025	3.481E-3	1.378E-7	1.00E0
EARTH	2034-04-15.52176	64067.5	0.1167807	0.1157914	1.142E-3	1.534E-6	1.00E0
EARTH	2034-08-25.04215	64199.0	0.1722531	0.1631649	3.051E-3	2.186E-7	1.00E0
EARTH	2047-01-22.29606	68732.3	0.0360105	0.0280683	9.401E-3	9.889E-8	1.00E0
EARTH	2048-07-09.72217	69266.7	0.0725227	0.0394053	8.548E-3	2.326E-7	1.00E0
EARTH	2060-12-18.67929	73811.7	0.1402763	0.1189306	7.604E-3	6.449E-8	1.00E0
EARTH	2061-03-31.68568	73914.7	0.1151769	0.1103634	1.840E-3	5.612E-7	1.00E0
EARTH	2061-09-05.29537	74072.3	0.1869623	0.1749955	3.880E-3	3.110E-7	1.00E0
EARTH	2074-01-18.23675	78590.2	0.1313979	0.0288660	2.470E-2	1.575E-7	9.70E-1
EARTH	2075-07-02.67777	79120.7	0.0199189	0.0057255	2.368E-2	3.099E-7	1.00E0
EARTH	2088-12-17.38403	84037.4	0.1367616	0.0065269	2.877E-1	5.497E-8	2.20E-1
EARTH	2089-03-25.86307	84135.9	0.1156578	0.0065258	8.663E-2	4.172E-7	6.70E-1
EARTH	2089-09-08.96196	84303.0	0.1901101	0.0056557	1.268E-1	3.160E-7	5.13E-1
EARTH	2103-01-20.81721	89183.8	0.0467451	0.0264522	5.681E-1	9.736E-8	1.16E-1
EARTH	2104-07-06.75769	89716.8	0.0132674	0.0068459	3.794E-1	4.517E-7	1.76E-1
EARTH	2116-11-24.35684	94240.4	0.1882218	0.0075897	4.967E0	7.233E-7	1.15E-2
EARTH	2117-05-17.51287	94414.5	0.1021661	0.0072702	5.945E0	1.237E-6	1.08E-2
EARTH	2117-07-28.99850	94487.0	0.1330765	0.0072730	1.066E1	3.097E-7	6.19E-3
EARTH	2130-01-22.36360	99047.4	0.0891712	0.0295182	1.644E1	1.192E-7	4.00E-3
EARTH	2130-02-19.80057	99075.8	0.0885116	0.0295175	1.205E1	3.576E-7	5.52E-3
EARTH	2143-01-24.37402	103797.4	0.0404609	0.0296508	2.516E0	1.016E-7	2.62E-2
EARTH	2144-07-11.79624	104331.8	0.0742960	0.0082517	4.864E-1	1.047E-6	1.37E-1

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