Asteroids

2020LD help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.243

Aphelion (Q)

2.194

Eccentricity (e)

0.800

Inclination (i)

3.4

deg

Orbit period (P)

491.4

Earth MOID

0.00184

U parameter

3.3

Next Earth close approach

Date

2037-09-06

Nominal distance (from Earth center)

0.06389

9557608

Maximum Brightness

19.9

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

22.4

mag

Diameter

90 - 200*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2020-06-07

Observatory

ATLAS-MLO, Mauna Loa

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

1.218729

1-sigma variation

0.000001

Unit

Eccentricity (e)

Value

0.800261

1-sigma variation

0.000001

Unit

Inclination (i)

Value

3.4274

1-sigma variation

3.456E-5

Unit

Long. of Ascending Node (Ω)

Value

73.2074

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

46.3869

1-sigma variation

0.0002

Unit

Mean Anomaly (M)

Value

51.88140

1-sigma variation

0.00005

Unit

Perihelion distance

Value

0.243428

1-sigma variation

Unit

Aphelion distance

Value

2.194030

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.703065

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.038986

1-sigma variation

Unit

MOID

Value

0.001839

1-sigma variation

Unit

Orbit Period

Value

491.4270

1-sigma variation

Unit

U parameter

Value

3.3

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	6.45571E-13	-1.00385E-12	-2.00894E-11	-6.21451E-11	1.56505E-10	3.15746E-11
e	-1.00385E-12	2.03736E-12	4.15640E-11	1.02908E-10	-2.95349E-10	-7.23429E-11
i	-2.00894E-11	4.15640E-11	1.19428E-9	1.93772E-9	-5.95257E-9	-1.44713E-9
Ω	-6.21451E-11	1.02908E-10	1.93772E-9	6.25971E-9	-1.57893E-8	-3.38622E-9
ω	1.56505E-10	-2.95349E-10	-5.95257E-9	-1.57893E-8	4.36650E-8	1.01913E-8
M	3.15746E-11	-7.23429E-11	-1.44713E-9	-3.38622E-9	1.01913E-8	2.68941E-9

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

22.39

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

[-]

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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

2950

Unit

Source

[1]

Unobserved

Value

445

Unit

Source

[1]

Normalized RMS of residuals

Value

0.553856

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2016-06-10.167201

Unit

Source

[2]

Last Observation

Value

2024-07-08.264731

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

148 (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

[-]

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 2020LD 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
MERCURY	1958-09-11 04:40	3.4	0.0244853	0.0243736	0.0000373
MERCURY	1961-06-03 05:03	4.0	0.0086263	0.0085025	0.0000413
MERCURY	1973-06-20 02:52	< 1 min	0.0159263	0.0159148	0.0000038
EARTH	1974-08-30 03:32	< 1 min	0.1991623	0.1991409	0.0000071
EARTH	1978-09-02 20:24	< 1 min	0.1217850	0.1217623	0.0000076
EARTH	1982-09-06 06:54	1.2	0.0679190	0.0679026	0.0000055
VENUS	1982-11-16 06:55	1.4	0.0303500	0.0302686	0.0000271
MERCURY	1985-07-07 06:21	2.0	0.0481946	0.0481034	0.0000304
EARTH	1986-09-09 22:38	< 1 min	0.1003193	0.1002822	0.0000124
EARTH	1990-09-12 23:38	< 1 min	0.1875742	0.1875358	0.0000128
MERCURY	2004-03-18 09:44	< 1 min	0.0122571	0.0122561	0.0000003
MERCURY	2006-12-10 13:28	< 1 min	0.0054755	0.0054613	0.0000048
MARS	2007-02-17 07:46	< 1 min	0.0077711	0.0077653	0.0000019
EARTH	2016-06-01 14:18	< 1 min	0.1029977	0.1029945	0.0000010
EARTH	2020-06-05 08:22	< 1 min	0.0020483	0.0020481	0.0000001
MERCURY	2025-09-23 09:43	< 1 min	0.0010356	0.0010339	0.0000006
MARS	2035-05-05 01:04	1.6	0.0313806	0.0312636	0.0000390
EARTH	2037-09-06 17:40	3.7	0.0638887	0.0638287	0.0000201
MERCURY	2039-02-17 09:40	6.9	0.0457546	0.0453246	0.0001434
EARTH	2041-09-13 19:00	3.0	0.1968986	0.1966834	0.0000717
MARS	2044-09-30 15:14	3.1	0.0242660	0.0240730	0.0000643
MERCURY	2055-04-12 20:20	21.9	0.0458556	0.0454290	0.0001422
EARTH	2055-06-03 17:48	4.3	0.0688201	0.0685619	0.0000861
EARTH	2059-06-11 20:58	4.0	0.1360053	0.1358042	0.0000670
VENUS	2060-08-06 10:53	4.0	0.0227002	0.0224923	0.0000693
MERCURY	2064-09-30 01:54	2.5	0.0105090	0.0104205	0.0000295
EARTH	2072-09-04 01:52	9.0	0.1057963	0.1054073	0.0001298
EARTH	2076-09-12 10:44	9.0	0.1505362	0.1499279	0.0002028
MERCURY	2084-11-22 06:23	32.1	0.0268759	0.0251694	0.0005735
EARTH	2090-06-04 05:01	12.1	0.0545317	0.0538283	0.0002345
MERCURY	2094-05-13 13:18	23.1	0.0305158	0.0299281	0.0001959
EARTH	2094-06-12 18:24	8.3	0.1572334	0.1568338	0.0001332
EARTH	2107-09-05 06:04	12.9	0.1215869	0.1210525	0.0001783
MERCURY	2107-10-10 17:17	20.6	0.0438469	0.0425563	0.0004307
EARTH	2111-09-13 03:57	12.5	0.1154484	0.1147966	0.0002175
MERCURY	2123-12-02 12:03	59.0	0.0273116	0.0255163	0.0006030
EARTH	2125-06-01 16:50	13.0	0.1639442	0.1629517	0.0003308

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
77.84044889	152.13239010	0.00180078	MINIMUM
282.69911992	243.43662479	0.06026549	MINIMUM
1.03448443	19.19599431	0.74125099	SADDLE
180.16333916	197.51893639	1.18274122	SADDLE
1.01908946	199.11589836	1.25880348	SADDLE
180.07057558	17.48380437	3.18024269	MAXIMUM

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MOID Plots

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