Asteroids

2016XW20 help

Last update: 2026-06-04 23:11 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.950

Aphelion (Q)

3.048

Eccentricity (e)

0.525

Inclination (i)

1.0

deg

Orbit period (P)

1032.6

Earth MOID

0.00455

U parameter

7.5

Next Earth close approach

Date

2065-02-18

Nominal distance (from Earth center)

0.08062

12060176

Maximum Brightness

23.7

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.9

mag

Diameter

11 - 25*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2016-12-08

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

1.999336

1-sigma variation

0.001139

Unit

Eccentricity (e)

Value

0.524700

1-sigma variation

0.000277

Unit

Inclination (i)

Value

1.0033

1-sigma variation

0.0007

Unit

Long. of Ascending Node (Ω)

Value

66.3673

1-sigma variation

0.0032

Unit

Arg. of Perihelion (ω)

Value

41.2630

1-sigma variation

0.0037

Unit

Mean Anomaly (M)

Value

121.22918

1-sigma variation

1.01677

Unit

Perihelion distance

Value

0.950284

1-sigma variation

Unit

Aphelion distance

Value

3.048387

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.053030

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

1.374470

1-sigma variation

Unit

MOID

Value

0.004547

1-sigma variation

Unit

Orbit Period

Value

1032.5877

1-sigma variation

Unit

U parameter

Value

7.5

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.29655E-6	3.15649E-7	8.11664E-7	3.58259E-6	-4.25818E-6	-1.15775E-3
e	3.15649E-7	7.68458E-8	1.97603E-7	8.72202E-7	-1.03667E-6	-2.81859E-4
i	8.11664E-7	1.97603E-7	5.09137E-7	2.25225E-6	-2.67417E-6	-7.24777E-4
Ω	3.58259E-6	8.72202E-7	2.25225E-6	9.98902E-6	-1.18468E-5	-3.19908E-3
ω	-4.25818E-6	-1.03667E-6	-2.67417E-6	-1.18468E-5	1.40597E-5	3.80235E-3
M	-1.15775E-3	-2.81859E-4	-7.24777E-4	-3.19908E-3	3.80235E-3	1.03382E0

Date of computation: 2026-06-04 23:11 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

26.867

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

11 - 25*

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

3492

Unit

Source

[1]

Normalized RMS of residuals

Value

0.538154

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2016-12-06.16656

Unit

Source

[2]

Last Observation

Value

2016-12-12.17702

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

51 (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

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 2016XW20 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	1958-01-21 08:22	> 1 mo	0.0326255	0.0210132	0.0403354
MARS	1960-08-01 20:18	> 1 d	0.0442157	0.0002702	0.0746211
EARTH	1972-02-16 03:35	> 1 w	0.0646369	0.0197189	0.1522110
EARTH	2016-12-13 00:17	< 1 min	0.0046007	0.0045940	0.0000023
EARTH	2065-02-18 18:57	> 1 w	0.0806173	0.0167343	0.1899027
EARTH	2082-01-04 08:31	> 1 mo	0.0323128	0.0058616	0.0184839
EARTH	2098-12-23 15:30	> 1 w	0.0183966	0.0046791	0.0353482
EARTH	2116-02-18 22:11	> 1 mo	0.0647595	0.0161892	0.7657571

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
345.16071751	340.38430172	0.00454116	MINIMUM
14.90376653	32.14776884	0.01601836	MINIMUM
0.63014404	7.30398444	0.03547042	SADDLE
0.20387156	186.54990564	1.96807663	SADDLE
180.06677044	186.37999424	2.03015713	SADDLE
180.05412444	6.37164571	4.03171275	MAXIMUM

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MOID Plots

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