Asteroids

2020NM help

Last update: 2026-07-30 14:25 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.886

Aphelion (Q)

1.388

Eccentricity (e)

0.221

Inclination (i)

1.4

deg

Orbit period (P)

443.0

Earth MOID

0.01573

U parameter

7.6

Next Earth close approach

Date

2026-11-27

Nominal distance (from Earth center)

0.02884

4314371

Maximum Brightness

22.3

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.1

mag

Diameter

16 - 40*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2020-07-11

Observatory

University of Arizona 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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.137262

1-sigma variation

0.000369

Unit

Eccentricity (e)

Value

0.220527

1-sigma variation

0.000413

Unit

Inclination (i)

Value

1.3796

1-sigma variation

0.0024

Unit

Long. of Ascending Node (Ω)

Value

207.5040

1-sigma variation

0.0328

Unit

Arg. of Perihelion (ω)

Value

157.9935

1-sigma variation

0.0382

Unit

Mean Anomaly (M)

Value

261.09062

1-sigma variation

0.80759

Unit

Perihelion distance

Value

0.886465

1-sigma variation

Unit

Aphelion distance

Value

1.388059

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.355955

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.097654

1-sigma variation

Unit

MOID

Value

0.015732

1-sigma variation

Unit

Orbit Period

Value

442.9852

1-sigma variation

Unit

U parameter

Value

7.6

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.36484E-7	1.52387E-7	8.87435E-7	7.89322E-6	-1.14015E-5	-2.98355E-4
e	1.52387E-7	1.70277E-7	9.93124E-7	9.09681E-6	-1.29849E-5	-3.33129E-4
i	8.87435E-7	9.93124E-7	5.80947E-6	5.62355E-5	-7.85561E-5	-1.94012E-3
Ω	7.89322E-6	9.09681E-6	5.62355E-5	1.07655E-3	-1.21856E-3	-1.72771E-2
ω	-1.14015E-5	-1.29849E-5	-7.85561E-5	-1.21856E-3	1.45697E-3	2.49439E-2
M	-2.98355E-4	-3.33129E-4	-1.94012E-3	-1.72771E-2	2.49439E-2	6.52207E-1

Date of computation: 2026-07-30 14:25 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

26.054

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

16 - 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

[-]

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

2301

Unit

Source

[1]

Normalized RMS of residuals

Value

0.698833

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2020-07-11.2586

Unit

Source

[2]

Last Observation

Value

2020-07-14.26191

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

34 (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

[-]

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

Filters

Initial Date: *

Final Date: *

Normalised Only accepted

Max residual (arcsec):

* - these fields are required

Plot

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Note: Ephemerides requests are limited to a maximum of 1000 points and a final date not exceeding 2040/12/31 00:00.

Close Approaches for 2020NM from 1950 to 2126

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1951-07-15 09:01	> 1 w	0.0252973	0.0246160	0.0130449
EARTH	1957-10-31 14:21	> 1 d	0.0894470	0.0864729	0.0010443
EARTH	1974-07-09 05:21	> 1 w	0.0610561	0.0248135	0.1283177
EARTH	1980-09-15 06:59	> 1 mo	0.1173448	0.1032777	0.0056678
EARTH	1986-12-03 15:02	> 1 d	0.0262339	0.0151003	0.0200035
EARTH	1997-07-07 12:08	> 1 d	0.0943893	0.0242739	0.0512855
EARTH	2003-10-08 17:02	> 1 mo	0.1124100	0.0866634	0.0093965
EARTH	2009-12-13 22:59	> 1 d	0.1850987	0.0836646	0.0339789
EARTH	2020-07-16 10:05	< 1 min	0.0272296	0.0270845	0.0000483
EARTH	2026-11-27 19:34	> 1 d	0.0288398	0.0158253	0.0144961
EARTH	2043-07-19 20:49	694.2	0.0396712	0.0324974	0.0026747
EARTH	2049-11-23 23:30	> 1 d	0.0427249	0.0308663	0.0040920
EARTH	2066-07-13 23:30	1089.3	0.0240058	0.0238907	0.0004396
EARTH	2072-09-30 20:06	> 1 w	0.1161189	0.1029553	0.0047793
EARTH	2078-12-06 09:41	> 1 d	0.0590014	0.0169728	0.0628692
EARTH	2095-08-10 03:20	> 1 mo	0.0857014	0.0305590	0.0390119
EARTH	2101-11-30 14:25	> 1 w	0.0201570	0.0168005	0.0507943
EARTH	2118-07-07 02:16	> 1 mo	0.1032741	0.0227271	1.1123161
EARTH	2124-08-22 05:11	> 1 mo	0.1007188	0.0399039	0.4360683

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
52.58988826	325.09350804	0.01573201	MINIMUM
298.74483369	188.15983431	0.02434980	MINIMUM
354.82683263	255.67401184	0.11733766	SADDLE
176.89152601	77.94215523	0.39121006	SADDLE
355.35481387	76.32876472	1.88321881	SADDLE
177.03379685	258.05094864	2.39109270	MAXIMUM

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MOID Plots

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