Asteroids

620071 2011WN15 help

Last update: 2025-07-29 02:36 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.173

Aphelion (Q)

2.261

Eccentricity (e)

0.858

Inclination (i)

33.4

deg

Orbit period (P)

490.3

Earth MOID

0.00333

U parameter

0.0

Next Earth close approach

Date

2062-12-02

Nominal distance (from Earth center)

0.19547

29241953

Maximum Brightness

18.2

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

19.6

mag

Diameter

300 - 700*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2011-11-22

Observatory

Catalina Sky 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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.216838

1-sigma variation

2.269E-10

Unit

Eccentricity (e)

Value

0.858033

1-sigma variation

1.046E-7

Unit

Inclination (i)

Value

33.4335

1-sigma variation

2.880E-5

Unit

Long. of Ascending Node (Ω)

Value

75.5497

1-sigma variation

4.486E-6

Unit

Arg. of Perihelion (ω)

Value

218.5699

1-sigma variation

1.316E-5

Unit

Mean Anomaly (M)

Value

36.32824

1-sigma variation

4.613E-6

Unit

Perihelion distance

Value

0.172750

1-sigma variation

Unit

Aphelion distance

Value

2.260926

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.010362

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.822402

1-sigma variation

Unit

MOID

Value

0.003330

1-sigma variation

Unit

Orbit Period

Value

490.2839

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	5.15013E-20	-1.74295E-17	3.39736E-15	7.55790E-16	1.52325E-15	7.49694E-16
e	-1.74295E-17	1.09452E-14	-2.01353E-12	-2.39526E-13	-1.26557E-12	-4.75645E-13
i	3.39736E-15	-2.01353E-12	8.29722E-10	7.61846E-11	1.92345E-10	9.66840E-11
Ω	7.55790E-16	-2.39526E-13	7.61846E-11	2.01260E-11	7.72204E-12	1.26131E-11
ω	1.52325E-15	-1.26557E-12	1.92345E-10	7.72204E-12	1.73173E-10	5.20082E-11
M	7.49694E-16	-4.75645E-13	9.66840E-11	1.26131E-11	5.20082E-11	2.12842E-11

Date of computation: 2025-07-29 02:36 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

[1]

Taxonomy (all)

Value

Unit

Source

[2]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

19.56

Unit

mag

Source

[3]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[3]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[4]

Diameter

Value

300 - 700*

Unit

Source

[4]

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]	EARN	1.) Michaël Marsset et al 2022 AJ 163 165
[2]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[3]	ESA Aegis	ESA orbit determination and impact monitoring system
[4]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

2981

Unit

Source

[1]

Unobserved

Value

2051

Unit

Source

[1]

Normalized RMS of residuals

Value

0.515206

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2011-11-22.49366

Unit

Source

[2]

Last Observation

Value

2020-01-20.12709

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

335 (2)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

2015-12-03

Unit

Source

[3]

Last Observation

Value

2019-12-12

Unit

Source

[3]

Delay (Discarded)

Value

6 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

2 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

8 (0)

Unit

Source

[1]

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
[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 620071 2011WN15 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	1964-12-04 08:13	< 1 s	0.0884018	0.0884016	0.0000001
EARTH	1968-12-09 10:07	< 1 s	0.0514359	0.0514358	0.0000001
EARTH	1972-12-15 09:53	< 1 s	0.1944318	0.1944316	0.0000001
EARTH	2015-12-05 13:04	< 1 s	0.0828614	0.0828614	0.0000000
EARTH	2019-12-10 17:15	< 1 s	0.0577520	0.0577520	0.0000000
EARTH	2062-12-02 03:59	< 1 s	0.1954704	0.1954702	0.0000000
EARTH	2066-12-06 18:35	< 1 s	0.0480450	0.0480449	0.0000001
EARTH	2070-12-12 03:59	< 1 s	0.0936584	0.0936582	0.0000000
EARTH	2117-12-06 22:37	< 1 s	0.0724620	0.0724618	0.0000001
EARTH	2121-12-12 03:24	< 1 s	0.0679213	0.0679210	0.0000001

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
77.12709512	334.00027623	0.00333023	MINIMUM
289.58478680	51.98324154	0.54051668	MINIMUM
5.44806030	209.58713333	0.86152100	SADDLE
3.83452694	22.86594105	1.14486469	SADDLE
183.99671583	7.94582120	1.38155134	SADDLE
178.27495765	186.45619155	3.23462384	MAXIMUM

Download:

MOID Plots

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