Asteroids

2016WA2 help

Last update: 2025-07-15 00:51 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.878

Aphelion (Q)

1.382

Eccentricity (e)

0.223

Inclination (i)

35.2

deg

Orbit period (P)

438.7

Earth MOID

0.00823

U parameter

0.8

Next Earth close approach

Date

2028-11-10

Nominal distance (from Earth center)

0.17928

26819514

Maximum Brightness

21.3

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

23.1

mag

Diameter

60 - 140*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2016-11-19

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

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.129861

1-sigma variation

4.732E-9

Unit

Eccentricity (e)

Value

0.222921

1-sigma variation

0.000003

Unit

Inclination (i)

Value

35.1685

1-sigma variation

0.0001

Unit

Long. of Ascending Node (Ω)

Value

52.3279

1-sigma variation

1.252E-5

Unit

Arg. of Perihelion (ω)

Value

251.1501

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

97.99014

1-sigma variation

0.00021

Unit

Perihelion distance

Value

0.877992

1-sigma variation

Unit

Aphelion distance

Value

1.381730

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.167728

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.008741

1-sigma variation

Unit

MOID

Value

0.008227

1-sigma variation

Unit

Orbit Period

Value

438.6680

1-sigma variation

Unit

U parameter

Value

0.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.23878E-17	-7.35328E-15	-2.43322E-14	-1.87834E-14	-6.60873E-15	8.14270E-13
e	-7.35328E-15	6.62448E-12	1.92516E-10	-1.51267E-11	-2.46247E-10	-4.95916E-10
i	-2.43322E-14	1.92516E-10	9.54708E-9	-1.01912E-9	-1.19732E-8	-9.75113E-9
Ω	-1.87834E-14	-1.51267E-11	-1.01912E-9	1.56818E-10	1.43652E-9	2.75596E-10
ω	-6.60873E-15	-2.46247E-10	-1.19732E-8	1.43652E-9	1.61429E-8	1.16535E-8
M	8.14270E-13	-4.95916E-10	-9.75113E-9	2.75596E-10	1.16535E-8	4.37347E-8

Date of computation: 2025-07-15 00:51 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

23.093

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

60 - 140*

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

2191

Unit

Source

[1]

Unobserved

Value

974

Unit

Source

[1]

Normalized RMS of residuals

Value

0.701775

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2016-11-19.17089

Unit

Source

[2]

Last Observation

Value

2022-11-19.22799

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

65 (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

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 2016WA2 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	1962-11-10 03:18	< 1 min	0.1916872	0.1916789	0.0000028
EARTH	1968-11-09 13:56	< 1 min	0.1831344	0.1831282	0.0000021
EARTH	1974-11-10 01:00	< 1 min	0.1749245	0.1749199	0.0000015
EARTH	1980-11-09 11:49	< 1 min	0.1682864	0.1682831	0.0000011
EARTH	1986-11-09 23:25	< 1 min	0.1621189	0.1621166	0.0000008
EARTH	1992-11-09 11:38	< 1 min	0.1577971	0.1577954	0.0000006
EARTH	1998-11-10 00:52	< 1 min	0.1545128	0.1545114	0.0000005
EARTH	2004-11-09 13:54	< 1 min	0.1532750	0.1532738	0.0000004
EARTH	2010-11-10 03:54	< 1 min	0.1541542	0.1541529	0.0000004
EARTH	2016-11-09 18:50	< 1 min	0.1582449	0.1582436	0.0000004
EARTH	2022-11-10 11:50	< 1 min	0.1663360	0.1663345	0.0000005
EARTH	2028-11-10 05:52	< 1 min	0.1792774	0.1792755	0.0000006
EARTH	2034-11-11 02:33	< 1 min	0.1983011	0.1982987	0.0000008
EARTH	2093-05-05 18:17	< 1 min	0.1806734	0.1806606	0.0000043
EARTH	2099-05-07 16:00	< 1 min	0.1471588	0.1471489	0.0000033
EARTH	2105-05-09 05:28	< 1 min	0.1222874	0.1222808	0.0000022
EARTH	2111-05-10 10:46	< 1 min	0.1051547	0.1051516	0.0000010
EARTH	2117-05-10 03:45	< 1 min	0.1005109	0.1005097	0.0000004
EARTH	2123-05-10 10:00	< 1 min	0.1066014	0.1065978	0.0000012

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
300.36427176	129.13633978	0.00822689	MINIMUM
90.06468031	305.92839744	0.15317640	MINIMUM
14.98153667	220.80306862	0.58613169	SADDLE
196.70377734	32.92640631	0.79802897	SADDLE
7.20780757	28.75515306	1.78152496	SADDLE
159.68999533	179.41225229	2.31257434	MAXIMUM

Download:

MOID Plots

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