Asteroids

2020DK help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.345

Aphelion (Q)

1.034

Eccentricity (e)

0.499

Inclination (i)

2.8

deg

Orbit period (P)

209.1

Earth MOID

0.00360

U parameter

8.0

Next Earth close approach

Date

2028-02-10

Nominal distance (from Earth center)

0.01176

1759349

Maximum Brightness

17.1

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

17 - 40*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2020-02-16

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.689361

1-sigma variation

0.000196

Unit

Eccentricity (e)

Value

0.499472

1-sigma variation

0.000141

Unit

Inclination (i)

Value

2.8165

1-sigma variation

0.0188

Unit

Long. of Ascending Node (Ω)

Value

322.9869

1-sigma variation

0.3285

Unit

Arg. of Perihelion (ω)

Value

13.4222

1-sigma variation

0.3796

Unit

Mean Anomaly (M)

Value

183.61143

1-sigma variation

0.70204

Unit

Perihelion distance

Value

0.345045

1-sigma variation

Unit

Aphelion distance

Value

1.033677

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.665444

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.018573

1-sigma variation

Unit

MOID

Value

0.003603

1-sigma variation

Unit

Orbit Period

Value

209.0586

1-sigma variation

Unit

U parameter

Value

8.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.84521E-8	2.77079E-8	3.68355E-6	-6.44123E-5	7.44308E-5	1.37664E-4
e	2.77079E-8	1.99659E-8	2.65430E-6	-4.64143E-5	5.36335E-5	9.91979E-5
i	3.68355E-6	2.65430E-6	3.52869E-4	-6.17042E-3	7.13015E-3	1.31876E-2
Ω	-6.44123E-5	-4.64143E-5	-6.17042E-3	1.07899E-1	-1.24681E-1	-2.30605E-1
ω	7.44308E-5	5.36335E-5	7.13015E-3	-1.24681E-1	1.44074E-1	2.66472E-1
M	1.37664E-4	9.91979E-5	1.31876E-2	-2.30605E-1	2.66472E-1	4.92855E-1

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

25.981

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

17 - 40*

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

2045

Unit

Source

[1]

Normalized RMS of residuals

Value

0.509707

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2020-02-04.358704

Unit

Source

[2]

Last Observation

Value

2020-02-21.20142

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

55 (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 2020DK 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	1953-02-06 08:36	596.5	0.0118716	0.0064222	0.0037965
EARTH	1957-02-06 01:36	1311.7	0.0142341	0.0065052	0.0079691
EARTH	1961-02-04 00:56	997.1	0.0439970	0.0072690	0.0144834
EARTH	1965-02-03 02:12	234.8	0.0886135	0.0418127	0.0156823
MERCURY	1967-09-23 02:49	> 1 d	0.0400755	0.0062044	0.0200977
VENUS	1967-11-16 16:40	623.3	0.0397040	0.0092377	0.0187593
EARTH	1969-02-03 11:10	176.9	0.1444014	0.1054026	0.0130106
MERCURY	1969-07-03 16:14	1022.4	0.0488851	0.0424857	0.0107944
MERCURY	1972-04-26 01:50	1036.0	0.0345859	0.0169430	0.0059572
EARTH	1980-03-16 14:47	463.1	0.1710911	0.1407137	0.0101587
EARTH	1984-03-17 07:19	268.1	0.1133412	0.0639273	0.0168724
MERCURY	1984-05-07 14:45	> 1 d	0.0133225	0.0069561	0.0242014
EARTH	1988-03-16 19:30	563.3	0.0653630	0.0253602	0.0176894
MERCURY	1988-12-08 14:52	> 1 d	0.0401260	0.0043144	0.0279818
EARTH	1992-03-14 19:06	> 1 d	0.0319948	0.0240520	0.0110777
VENUS	1993-02-04 01:20	604.1	0.0341703	0.0078976	0.0269871
EARTH	1996-03-12 18:10	> 1 d	0.0238679	0.0236908	0.0012991
EARTH	2000-03-11 05:08	> 1 d	0.0245663	0.0235681	0.0027529
VENUS	2001-02-04 11:24	811.6	0.0344708	0.0073375	0.0211566
EARTH	2004-03-08 06:30	> 1 d	0.0314356	0.0244883	0.0047991
EARTH	2008-03-03 05:58	> 1 d	0.0407620	0.0330436	0.0029737
EARTH	2012-02-26 06:01	> 1 d	0.0450189	0.0446371	0.0001879
EARTH	2016-02-19 23:15	1343.0	0.0412373	0.0377895	0.0011596
EARTH	2020-02-15 05:59	< 1 s	0.0317216	0.0316516	0.0000233
EARTH	2024-02-12 16:30	1095.2	0.0232231	0.0146707	0.0028887
VENUS	2025-09-13 17:48	273.5	0.0122652	0.0063755	0.0079728
EARTH	2028-02-10 00:28	292.4	0.0117605	0.0082474	0.0012586
EARTH	2032-02-09 10:55	> 1 d	0.0086079	0.0033943	0.0059642
VENUS	2033-09-13 11:26	219.9	0.0386085	0.0232599	0.0051261
EARTH	2036-02-13 03:19	904.0	0.0253819	0.0187860	0.0022541
MERCURY	2039-04-04 23:00	> 1 d	0.0309025	0.0073089	0.0236380
EARTH	2040-02-18 17:48	> 1 d	0.0390362	0.0251574	0.0049150
VENUS	2041-09-11 01:03	462.9	0.0380935	0.0062773	0.0313742
EARTH	2044-02-26 15:31	> 1 d	0.0438002	0.0432786	0.0006676
MERCURY	2045-07-15 03:24	> 1 d	0.0444340	0.0026299	0.0323067
EARTH	2048-03-05 19:11	> 1 d	0.0347358	0.0275764	0.0068454
EARTH	2052-03-11 13:47	> 1 d	0.0240926	0.0240502	0.0009604
EARTH	2056-03-15 01:52	> 1 d	0.0439044	0.0233203	0.0235780
MERCURY	2056-05-12 11:04	> 1 d	0.0074135	0.0074031	0.0025151
VENUS	2057-01-29 07:07	> 1 d	0.0489474	0.0058325	0.0519175
EARTH	2060-03-16 14:59	746.7	0.0900682	0.0239543	0.0483674
MERCURY	2062-08-21 12:31	> 1 w	0.0490918	0.0025719	0.0741463
EARTH	2064-03-16 10:36	1237.3	0.1483451	0.0244961	0.0679291
MERCURY	2064-05-25 19:23	> 1 d	0.0476064	0.0421205	0.0678411
EARTH	2073-02-04 16:32	> 1 d	0.1991211	0.0064292	0.0833042
EARTH	2077-02-03 11:00	1068.1	0.1348979	0.0051670	0.0729850
MERCURY	2079-09-21 08:12	> 1 d	0.0195033	0.0075372	0.0916666
EARTH	2081-02-03 09:30	1335.2	0.0755993	0.0037473	0.0583829
EARTH	2085-02-05 07:33	> 1 d	0.0246933	0.0023815	0.0284036
MERCURY	2085-12-30 06:53	> 1 d	0.0394374	0.0059098	0.0268794
EARTH	2089-02-07 20:36	> 1 d	0.0022587	0.0020438	0.0048979
EARTH	2093-02-22 09:46	> 1 mo	0.0431056	0.0348908	0.0571190
MERCURY	2094-01-07 17:48	> 1 mo	0.0448528	0.0444052	0.2579165
EARTH	2097-03-10 03:12	> 1 mo	0.0291561	0.0284483	0.1831387
MERCURY	2098-07-06 03:38	> 1 mo	0.0050528	0.0039833	1.5073658
EARTH	2101-03-17 07:23	> 1 mo	0.0793257	0.0318719	2.2826525
VENUS	2103-03-21 00:20	> 1 mo	0.0388291	0.0086489	4.3455892
EARTH	2105-03-16 15:17	> 1 mo	0.1861663	0.0355120	3.4797188
MERCURY	2108-03-26 21:39	> 1 mo	0.0461895	0.0441684	2.1560063
EARTH	2110-02-05 02:49	> 1 mo	0.1634559	0.0055713	3.6803664
VENUS	2110-08-07 22:33	> 1 mo	0.0093583	0.0082977	2.1972461
MERCURY	2112-09-20 00:57	> 1 mo	0.0164086	0.0035847	14.8678244
EARTH	2114-02-05 19:08	> 1 mo	0.0374240	0.0023219	11.4318492
VENUS	2117-12-25 16:01	> 1 mo	0.0140624	0.0082548	21.0964177
EARTH	2118-02-18 07:33	> 1 mo	0.0368387	0.0100334	6.2842503
MERCURY	2120-09-06 21:16	> 1 mo	0.0481230	0.0001841	11.4635181
EARTH	2122-03-06 18:47	> 1 mo	0.0376119	0.0372782	0.2036953
MERCURY	2122-06-10 09:09	> 1 mo	0.0480748	0.0431482	1.5667816

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
150.22493833	36.06978254	0.00380358	MINIMUM
206.22215019	68.50353380	0.02340904	MINIMUM
179.96846855	53.32203885	0.04407331	SADDLE
356.40722995	229.94788953	0.66537206	SADDLE
356.45886408	49.99491810	1.33442704	SADDLE
178.71646907	232.59226974	2.04247347	MAXIMUM

Download:

MOID Plots

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

Level lines of the squared distance function

2020DK

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2089-02-07.946	84089.946	-1.193	0.28 ± 0.008	2.62E6	2.15E-7	3.37E-1	-7.33
2089-02-07.947	84089.947	-1.437	1.06 ± 0.004	1.33E6	2.72E-7	3.38E-1	-7.23
2093-02-07.751	85550.751	-0.799	0.11 ± 0.000	2.72E6	3.11E-7	3.41E-1	-7.19
2093-02-07.754	85550.754	-0.795	0.87 ± 0.000	6.46E5	1.06E-6	3.39E-1	-6.66
2093-02-07.754	85550.754	-0.799	0.87 ± 0.014	6.65E5	1.04E-6	3.38E-1	-6.67
2093-02-07.892	85550.892	-1.297	0.30 ± 0.005	2.17E5	2.27E-6	3.38E-1	-6.33
2093-02-07.899	85550.899	-1.251	1.15 ± 0.005	3.41E5	9.76E-7	3.38E-1	-6.70
2093-02-07.901	85550.901	-1.250	0.92 ± 0.005	2.58E5	1.71E-6	3.37E-1	-6.45
2097-02-07.984	87011.984	-1.107	0.08 ± 0.077	7.60E6	8.31E-8	3.38E-1	-7.79
2098-02-08.225	87377.225	-1.189	0.37 ± 0.004	1.66E6	3.38E-7	3.37E-1	-7.19
2106-02-09.225	90299.225	-1.183	0.89 ± 0.001	2.18E5	2.66E-6	3.38E-1	-6.33
2110-02-09.176	91760.176	-1.184	0.42 ± 0.000	1.27E6	4.38E-7	3.38E-1	-7.14
2114-02-09.288	93221.288	-4.066	0.27 ± 0.003	3.38E4	8.85E-9	3.38E-1	-8.85
2114-02-09.293	93221.293	-4.975	0.85 ± 0.001	1.23E5	3.27E-11	3.36E-1	-11.28
2118-02-08.979	94681.979	-0.832	1.38 ± 0.000	5.96E6	7.26E-8	3.39E-1	-7.95
2122-02-09.152	96143.152	-3.409	0.55 ± 0.000	9.84E4	3.46E-8	3.38E-1	-8.29
2122-02-09.163	96143.163	-3.256	0.30 ± 0.001	1.12E5	5.14E-8	3.39E-1	-8.12
2122-02-09.216	96143.216	-3.207	1.42 ± 0.002	1.59E4	1.51E-7	3.38E-1	-7.65


Based on 55 optical observations (of which 3 are rejected as outliers) from 2020/02/04.359 to 2020/02/21.201.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.47 and 1.47 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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