Asteroids

2016WG help

Last update: 2025-11-24 16:53 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.474

Aphelion (Q)

3.191

Eccentricity (e)

0.742

Inclination (i)

0.2

deg

Orbit period (P)

905.9

Earth MOID

0.00148

U parameter

7.3

Next Earth close approach

Date

2039-06-26

Nominal distance (from Earth center)

0.07102

10624627

Maximum Brightness

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

23.3

mag

Diameter

60 - 130*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2016-11-18

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

1.832326

1-sigma variation

0.000584

Unit

Eccentricity (e)

Value

0.741508

1-sigma variation

0.000116

Unit

Inclination (i)

Value

0.2157

1-sigma variation

3.559E-5

Unit

Long. of Ascending Node (Ω)

Value

292.8775

1-sigma variation

0.0112

Unit

Arg. of Perihelion (ω)

Value

233.3153

1-sigma variation

0.0107

Unit

Mean Anomaly (M)

Value

206.38051

1-sigma variation

0.63615

Unit

Perihelion distance

Value

0.473642

1-sigma variation

Unit

Aphelion distance

Value

3.191010

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.482961

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.415205

1-sigma variation

Unit

MOID

Value

0.001483

1-sigma variation

Unit

Orbit Period

Value

905.9465

1-sigma variation

Unit

U parameter

Value

7.3

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.41344E-7	6.77881E-8	1.99822E-8	6.24626E-6	-5.92874E-6	-3.71668E-4
e	6.77881E-8	1.34622E-8	3.96809E-9	1.24055E-6	-1.17748E-6	-7.38102E-5
i	1.99822E-8	3.96809E-9	1.26667E-9	3.32935E-7	-3.14394E-7	-2.17574E-5
Ω	6.24626E-6	1.24055E-6	3.32935E-7	1.25370E-4	-1.19541E-4	-6.80116E-3
ω	-5.92874E-6	-1.17748E-6	-3.14394E-7	-1.19541E-4	1.14010E-4	6.45542E-3
M	-3.71668E-4	-7.38102E-5	-2.17574E-5	-6.80116E-3	6.45542E-3	4.04685E-1

Date of computation: 2025-11-24 16:53 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

23.318

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 - 130*

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

3298

Unit

Source

[1]

Normalized RMS of residuals

Value

0.508305

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2016-11-04.59001

Unit

Source

[2]

Last Observation

Value

2016-11-25.87197

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

141 (3)

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 2016WG 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	1960-06-20 13:10	> 1 d	0.0238554	0.0031461	0.0298081
MARS	1962-07-27 18:22	1123.1	0.0188418	0.0144004	0.0232318
EARTH	1979-11-27 11:14	> 1 w	0.0419209	0.0039109	0.5552895
EARTH	1992-06-23 11:22	> 1 d	0.0192789	0.0023834	0.0793299
EARTH	2016-11-25 20:07	< 1 s	0.0107967	0.0107911	0.0000019
VENUS	2031-11-01 14:18	> 1 d	0.0225292	0.0069803	0.0468839
EARTH	2039-06-26 18:16	> 1 d	0.0710212	0.0013377	0.0810933
VENUS	2044-05-24 12:04	> 1 w	0.0470825	0.0097446	0.1583121
EARTH	2044-06-15 12:30	> 1 w	0.1267290	0.0012673	0.1391467
EARTH	2078-12-05 09:48	> 1 w	0.1625939	0.0018206	0.1960102
EARTH	2083-11-23 22:18	> 1 w	0.0607105	0.0017897	0.2339336
MARS	2103-08-22 07:55	667.9	0.0129281	0.0101742	0.0029180
VENUS	2106-04-11 22:22	> 1 d	0.0350747	0.0081628	0.0248467
EARTH	2106-06-25 11:02	1415.5	0.0086696	0.0002639	0.0256135
EARTH	2111-06-20 07:44	> 1 w	0.0948892	0.0002912	0.3654626
VENUS	2116-05-22 11:56	> 1 mo	0.0306392	0.0077874	0.7963216

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
53.06011752	168.44337468	0.00151629	MINIMUM
308.47772410	321.75951847	0.00288972	MINIMUM
1.62684532	66.37979202	0.51912926	SADDLE
1.64818367	246.41107170	1.48060060	SADDLE
180.24108336	244.31446178	2.18403731	SADDLE
180.23743586	64.30930187	4.18376166	MAXIMUM

Download:

MOID Plots

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

Level lines of the squared distance function

2016WG

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2076-06-23.251	79477.251	-3.148	0.000	0.57 ± 0.004	1.31E6	4.50E-9	4.56E1	-7.21
2076-06-23.283	79477.283	-0.500	0.000	1.01 ± 0.004	3.04E6	1.79E-7	4.57E1	-5.61
2076-06-23.299	79477.299	-0.504	0.000	0.50 ± 0.004	2.82E5	2.64E-6	4.58E1	-4.44
2076-06-23.303	79477.303	-0.505	0.000	0.64 ± 0.004	3.07E5	2.39E-6	4.56E1	-4.48
2081-06-23.495	81303.495	-2.177	0.000	0.96 ± 0.004	3.90E6	1.14E-8	4.58E1	-6.84
2081-06-23.604	81303.604	-1.237	0.000	0.91 ± 0.004	4.17E6	5.62E-8	4.57E1	-6.15
2086-06-23.287	83129.287	-0.674	1.826	1.11 ± 0.004	4.81E6	2.26E-10	4.56E1	-8.58
2086-06-23.295	83129.295	-0.498	0.000	0.17 ± 0.004	1.32E7	5.85E-8	4.56E1	-6.17
2086-06-23.421	83129.421	-0.680	0.000	0.99 ± 0.004	5.82E5	5.46E-7	4.56E1	-5.20
2086-06-23.721	83129.721	-4.017	0.000	0.78 ± 0.004	6.20E6	3.45E-11	4.55E1	-9.40
2091-06-23.594	84955.594	-1.221	0.000	0.96 ± 0.004	4.00E6	5.91E-8	4.55E1	-6.20
2091-06-23.620	84955.620	-0.681	0.000	0.87 ± 0.004	2.51E7	2.17E-8	4.56E1	-6.63
2091-06-23.621	84955.621	-1.228	0.000	0.89 ± 0.004	7.01E6	3.56E-8	4.55E1	-6.42
2091-06-23.673	84955.673	-2.210	0.000	0.92 ± 0.004	4.25E6	1.09E-8	4.55E1	-6.93
2096-06-22.945	86781.945	-3.235	0.000	0.07 ± 0.004	5.59E6	8.43E-10	4.57E1	-8.07
2096-06-23.083	86782.083	-0.442	0.000	0.23 ± 0.004	1.75E7	4.55E-8	4.59E1	-6.34
2096-06-23.088	86782.088	-4.227	0.000	0.14 ± 0.004	1.77E6	6.52E-11	4.56E1	-9.19
2096-06-23.527	86782.527	-0.364	0.000	0.94 ± 0.004	9.99E6	6.77E-8	4.59E1	-6.17
2101-06-24.795	88608.795	2.090	0.000	0.90 ± 0.004	1.72E6	3.34E-8	4.61E1	-6.50
2102-06-24.373	88973.373	-0.998	0.000	0.73 ± 0.006	1.00E8	4.61E-9	4.56E1	-7.37


Based on 141 optical observations (of which 3 are rejected as outliers) from 2016/11/04.590 to 2016/11/25.872.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 1.11 and 1.11 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
AstOD software version= 4.0, Date of computation=20250805 130500.123 UTC.

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