Asteroids

2020LD help

Last update: 2024-04-19 00:31 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.244

Aphelion (Q)

2.197

Eccentricity (e)

0.800

Inclination (i)

3.4

deg

Orbit period (P)

492.3

Earth MOID

0.00180

U parameter

6.9

Next Earth close approach

Date

2033-09-02

Nominal distance (from Earth center)

0.13706

20503350

Maximum Brightness

21.8

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

22.3

mag

Diameter

90 - 200*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2020-06-07

Observatory

ATLAS-MLO, Mauna Loa

Orbit Visualiser

Click the button to start Orbit Visualiser

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

60400.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.220110

1-sigma variation

0.000149

Unit

Eccentricity (e)

Value

0.800350

1-sigma variation

0.000049

Unit

Inclination (i)

Value

3.4301

1-sigma variation

0.0005

Unit

Long. of Ascending Node (Ω)

Value

73.1788

1-sigma variation

0.0003

Unit

Arg. of Perihelion (ω)

Value

46.4379

1-sigma variation

0.0008

Unit

Mean Anomaly (M)

Value

332.87431

1-sigma variation

0.19571

Unit

Perihelion distance

Value

0.243595

1-sigma variation

Unit

Aphelion distance

Value

2.196625

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.701900

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.038085

1-sigma variation

Unit

MOID

Value

0.001798

1-sigma variation

Unit

Orbit Period

Value

492.2626

1-sigma variation

Unit

U parameter

Value

6.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.22240E-8	7.30734E-9	6.92298E-8	-1.22213E-8	-9.66900E-8	-2.91762E-5
e	7.30734E-9	2.41046E-9	2.30451E-8	-3.17388E-9	-3.31876E-8	-9.59390E-6
i	6.92298E-8	2.30451E-8	2.27616E-7	-4.98731E-9	-3.53975E-7	-9.09101E-5
Ω	-1.22213E-8	-3.17388E-9	-4.98731E-9	1.03243E-7	-1.02068E-7	1.59738E-5
ω	-9.66900E-8	-3.31876E-8	-3.53975E-7	-1.02068E-7	6.74217E-7	1.27053E-4
M	-2.91762E-5	-9.59390E-6	-9.09101E-5	1.59738E-5	1.27053E-4	3.83033E-2

Date of computation: 2024-02-21 14:29 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

22.338

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

90 - 200*

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 ODIM	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

1372

Unit

Source

[1]

Normalized RMS of residuals

Value

0.553147

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2020-06-07.441338

Unit

Source

[2]

Last Observation

Value

2020-07-17.335794

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

140 (1)

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 2020LD from 1950 to 2124

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possibile distance in au	Distance uncert. in au
MERCURY	1958-09-11 03:57	> 1 d	0.0240680	0.0122636	0.0950910
MERCURY	1961-06-03 06:40	> 1 w	0.0076229	0.0015770	0.1413251
MERCURY	1973-06-20 08:47	249.3	0.0203544	0.0110280	0.0031588
EARTH	1974-08-30 06:35	599.3	0.1961887	0.1724208	0.0080405
EARTH	1978-09-02 23:09	> 1 d	0.1191542	0.0666236	0.0354712
EARTH	1982-09-06 09:13	> 1 d	0.0668890	0.0647486	0.0190268
VENUS	1982-11-16 09:46	> 1 d	0.0334499	0.0013818	0.0934318
EARTH	1986-09-09 23:21	> 1 d	0.1010918	0.0636438	0.0598225
EARTH	1990-09-12 23:06	> 1 d	0.1871700	0.0625615	0.0687104
MERCURY	2004-03-17 23:40	> 1 d	0.0150667	0.0121494	0.0309472
MERCURY	2006-12-09 21:24	> 1 d	0.0155846	0.0016039	0.0189476
MARS	2007-02-17 03:57	430.8	0.0039535	0.0035426	0.0043399
EARTH	2016-06-01 12:32	198.3	0.1052542	0.0924301	0.0042748
EARTH	2020-06-05 08:22	< 1 min	0.0020483	0.0020474	0.0000003
MERCURY	2025-09-23 16:21	738.3	0.0035248	0.0001221	0.0085695
MERCURY	2032-06-20 20:23	> 1 d	0.0122943	0.0000406	0.0515984
EARTH	2033-09-02 14:41	> 1 d	0.1370564	0.0612368	0.0337269
EARTH	2037-09-12 06:23	> 1 d	0.1450859	0.0604036	0.0433511
MERCURY	2039-03-18 00:58	> 1 d	0.0372021	0.0005767	0.0704818
VENUS	2048-09-10 08:38	> 1 d	0.0469144	0.0025722	0.0698725
EARTH	2051-06-08 03:42	> 1 d	0.0478388	0.0022215	0.0456170
EARTH	2064-09-04 22:43	> 1 d	0.0903990	0.0599659	0.0388886
EARTH	2068-09-13 20:47	> 1 d	0.1986127	0.0602023	0.0774863
VENUS	2077-01-01 01:39	> 1 d	0.0444186	0.0028096	0.1592443
EARTH	2078-05-31 17:18	> 1 d	0.1615947	0.0028499	0.1250986
VENUS	2080-11-24 11:27	> 1 d	0.0179361	0.0007421	0.1386105
EARTH	2082-06-10 18:45	> 1 d	0.1130846	0.0056582	0.0358265
EARTH	2095-09-11 18:44	> 1 w	0.1050694	0.0596956	0.4973115
MERCURY	2099-11-27 00:08	> 1 mo	0.0284960	0.0001863	1.0807829
MERCURY	2106-08-28 14:02	> 1 mo	0.0079576	0.0006033	1.3305299
EARTH	2109-06-10 11:28	> 1 w	0.0826043	0.0034049	0.3414066
4 Vesta	2116-09-24 05:13	> 1 mo	0.0191561	0.0127021	0.0522671
EARTH	2122-09-12 19:06	> 1 mo	0.1057763	0.0594416	1.9064054
MERCURY	2124-03-01 02:06	> 1 mo	0.0452138	0.0108196	4.2914741

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