Asteroids

2021EV3 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.690

Aphelion (Q)

1.826

Eccentricity (e)

0.451

Inclination (i)

19.0

deg

Orbit period (P)

515.3

Earth MOID

0.03770

U parameter

8.7

Next Earth close approach

Date

2025-10-07

Nominal distance (from Earth center)

0.19233

28771597

Maximum Brightness

22.3

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

22.9

mag

Diameter

70 - 160*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2021-03-10

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

1.257830

1-sigma variation

0.002330

Unit

Eccentricity (e)

Value

0.451423

1-sigma variation

0.001384

Unit

Inclination (i)

Value

18.9796

1-sigma variation

0.0466

Unit

Long. of Ascending Node (Ω)

Value

11.6433

1-sigma variation

0.0062

Unit

Arg. of Perihelion (ω)

Value

261.3588

1-sigma variation

0.0510

Unit

Mean Anomaly (M)

Value

71.16137

1-sigma variation

3.26127

Unit

Perihelion distance

Value

0.690016

1-sigma variation

Unit

Aphelion distance

Value

1.825644

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.073891

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.062737

1-sigma variation

Unit

MOID

Value

0.037699

1-sigma variation

Unit

Orbit Period

Value

515.2661

1-sigma variation

Unit

U parameter

Value

8.7

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	5.42912E-6	3.22527E-6	1.08686E-4	1.43571E-5	-1.18903E-4	-7.59890E-3
e	3.22527E-6	1.91604E-6	6.45671E-5	8.52905E-6	-7.06367E-5	-4.51427E-3
i	1.08686E-4	6.45671E-5	2.17581E-3	2.87405E-4	-2.38031E-3	-1.52123E-1
Ω	1.43571E-5	8.52905E-6	2.87405E-4	3.79740E-5	-3.14450E-4	-2.00950E-2
ω	-1.18903E-4	-7.06367E-5	-2.38031E-3	-3.14450E-4	2.60416E-3	1.66424E-1
M	-7.59890E-3	-4.51427E-3	-1.52123E-1	-2.00950E-2	1.66424E-1	1.06359E1

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

22.874

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

70 - 160*

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

1642

Unit

Source

[1]

Normalized RMS of residuals

Value

0.519694

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2021-03-10.423241

Unit

Source

[2]

Last Observation

Value

2021-03-24.15597

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

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 2021EV3 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	1953-10-02 14:10	> 1 mo	0.0999048	0.0429083	1.3169892
EARTH	1970-09-22 10:50	> 1 mo	0.1921025	0.0381620	1.8202223
EARTH	1973-03-24 05:59	> 1 mo	0.0665374	0.0392100	1.5435628
EARTH	1977-10-07 00:56	> 1 mo	0.1981255	0.0393954	1.6640058
EARTH	1994-09-24 08:40	> 1 w	0.1383623	0.0378360	0.5896678
EARTH	1997-03-26 19:29	> 1 w	0.0387211	0.0378094	0.0911165
EARTH	2018-09-23 21:10	> 1 d	0.1526188	0.0363121	0.0509234
EARTH	2021-03-25 16:00	< 1 s	0.0482106	0.0478165	0.0001314
EARTH	2025-10-07 02:01	> 1 d	0.1923262	0.0357723	0.0722357
EARTH	2045-03-19 16:54	> 1 w	0.1535071	0.0402729	0.4009970
EARTH	2049-10-02 02:53	> 1 w	0.0770284	0.0387615	0.3942887
EARTH	2052-04-08 08:44	> 1 mo	0.1814583	0.0498632	0.4415341
EARTH	2073-09-29 06:25	> 1 w	0.0388952	0.0384041	0.0408136
EARTH	2076-04-02 16:48	> 1 w	0.1111293	0.0392673	0.3212943
EARTH	2097-09-27 07:57	> 1 mo	0.0674770	0.0371953	0.6401365
EARTH	2100-03-31 10:20	> 1 mo	0.0630663	0.0350223	0.6509165
EARTH	2121-09-26 13:54	> 1 w	0.1077227	0.0342497	0.3208381
EARTH	2124-03-29 02:19	> 1 w	0.0353992	0.0335388	0.0862663

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
299.73922762	83.39356252	0.03717832	MINIMUM
65.65637314	264.74862281	0.04046191	MINIMUM
3.18163507	175.62092197	0.42658971	SADDLE
181.92438493	351.59595777	0.94857081	SADDLE
1.25808969	352.23865624	1.65199373	SADDLE
179.47434633	170.02442966	2.80667466	MAXIMUM

Download:

MOID Plots

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