Asteroids

2020AP1 help

Last update: 2025-07-29 02:36 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.982

Aphelion (Q)

2.216

Eccentricity (e)

0.386

Inclination (i)

2.2

deg

Orbit period (P)

738.6

Earth MOID

0.00169

U parameter

7.8

Next Earth close approach

Date

2106-11-20

Nominal distance (from Earth center)

0.08719

13042733

Maximum Brightness

26.5

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

29.5

mag

Diameter

3 - 7*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2020-01-04

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

1.599118

1-sigma variation

0.001214

Unit

Eccentricity (e)

Value

0.385625

1-sigma variation

0.000396

Unit

Inclination (i)

Value

2.2126

1-sigma variation

0.0150

Unit

Long. of Ascending Node (Ω)

Value

100.9451

1-sigma variation

0.0245

Unit

Arg. of Perihelion (ω)

Value

350.4871

1-sigma variation

0.1553

Unit

Mean Anomaly (M)

Value

238.04459

1-sigma variation

0.59009

Unit

Perihelion distance

Value

0.982458

1-sigma variation

Unit

Aphelion distance

Value

2.215778

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.002496

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

1.180980

1-sigma variation

Unit

MOID

Value

0.001689

1-sigma variation

Unit

Orbit Period

Value

738.6168

1-sigma variation

Unit

U parameter

Value

7.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.47360E-6	4.81307E-7	-1.82045E-5	-2.97875E-5	1.88499E-4	-7.16320E-4
e	4.81307E-7	1.57206E-7	-5.94590E-6	-9.72886E-6	6.15658E-5	-2.33964E-4
i	-1.82045E-5	-5.94590E-6	2.24898E-4	3.68006E-4	-2.32875E-3	8.84927E-3
Ω	-2.97875E-5	-9.72886E-6	3.68006E-4	6.02230E-4	-3.81084E-3	1.44799E-2
ω	1.88499E-4	6.15658E-5	-2.32875E-3	-3.81084E-3	2.41147E-2	-9.16304E-2
M	-7.16320E-4	-2.33964E-4	8.84927E-3	1.44799E-2	-9.16304E-2	3.48204E-1

Date of computation: 2025-07-29 02:36 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

29.52

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

3 - 7*

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

2052

Unit

Source

[1]

Normalized RMS of residuals

Value

0.803582

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2020-01-04.37133

Unit

Source

[2]

Last Observation

Value

2020-01-05.44163

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

25 (3)

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 2020AP1 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	1956-02-03 06:05	> 1 mo	0.1966149	0.0118285	3.4866837
EARTH	1957-11-09 22:56	> 1 mo	0.1101361	0.0266077	3.4477040
EARTH	1985-01-09 05:55	> 1 w	0.0170614	0.0001692	0.0694493
EARTH	2020-01-02 15:31	< 1 min	0.0021852	0.0021816	0.0000012
EARTH	2022-01-07 22:58	> 1 d	0.0120926	0.0011320	0.0036693
EARTH	2024-01-30 00:45	1376.7	0.1141657	0.0880332	0.0087215
EARTH	2106-11-20 15:57	> 1 mo	0.0871853	0.0197365	0.3365539
EARTH	2108-12-17 14:57	> 1 mo	0.0106662	0.0065840	0.0724887
EARTH	2111-01-07 15:14	> 1 mo	0.0085629	0.0001439	0.0573458
EARTH	2113-02-05 14:06	> 1 mo	0.1677748	0.0181251	0.6185865

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
5.07162110	356.86056807	0.00168863	MINIMUM
179.77547279	168.97423152	1.19980767	SADDLE
359.52810571	168.68743552	1.99844777	SADDLE
179.82075499	349.00718372	3.19969667	MAXIMUM

Download:

MOID Plots

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