Asteroids

2016WH help

Last update: 2026-03-17 23:26 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.839

Aphelion (Q)

2.370

Eccentricity (e)

0.477

Inclination (i)

2.8

deg

Orbit period (P)

742.6

Earth MOID

0.00630

U parameter

4.9

Next Earth close approach

Date

2077-11-08

Nominal distance (from Earth center)

0.17174

25691792

Maximum Brightness

26.2

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

27.2

mag

Diameter

10 - 21*

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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.604906

1-sigma variation

0.000014

Unit

Eccentricity (e)

Value

0.477003

1-sigma variation

0.000005

Unit

Inclination (i)

Value

2.7506

1-sigma variation

0.0004

Unit

Long. of Ascending Node (Ω)

Value

51.2478

1-sigma variation

0.0029

Unit

Arg. of Perihelion (ω)

Value

65.4163

1-sigma variation

0.0028

Unit

Mean Anomaly (M)

Value

232.28238

1-sigma variation

0.01896

Unit

Perihelion distance

Value

0.839361

1-sigma variation

Unit

Aphelion distance

Value

2.370451

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.044943

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.535567

1-sigma variation

Unit

MOID

Value

0.006298

1-sigma variation

Unit

Orbit Period

Value

742.6307

1-sigma variation

Unit

U parameter

Value

4.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.90074E-10	6.81033E-11	3.33766E-9	3.94327E-8	-3.82728E-8	-2.61333E-7
e	6.81033E-11	2.45877E-11	1.23932E-9	1.41992E-8	-1.37264E-8	-9.36704E-8
i	3.33766E-9	1.23932E-9	1.64071E-7	8.83133E-7	-8.42788E-7	-4.64100E-6
Ω	3.94327E-8	1.41992E-8	8.83133E-7	8.52621E-6	-8.25184E-6	-5.43094E-5
ω	-3.82728E-8	-1.37264E-8	-8.42788E-7	-8.25184E-6	8.00261E-6	5.27009E-5
M	-2.61333E-7	-9.36704E-8	-4.64100E-6	-5.43094E-5	5.27009E-5	3.59334E-4

Date of computation: 2026-03-17 23:26 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

27.218

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

10 - 21*

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

3413

Unit

Source

[1]

Normalized RMS of residuals

Value

0.511409

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2016-11-19.13114

Unit

Source

[2]

Last Observation

Value

2016-11-20.15211

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

40 (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

2016-11-23

Unit

Source

[3]

Last Observation

Value

2016-11-23

Unit

Source

[3]

Delay (Discarded)

Value

0 (0)

Unit

Source

[-]

Doppler (Discarded)

Value

1 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

1 (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

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 2016WH 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	1950-02-11 15:41	> 1 d	0.1323556	0.1202172	0.0040811
EARTH	1952-03-16 05:33	1073.7	0.0422984	0.0421006	0.0006396
EARTH	1954-03-30 02:06	575.0	0.1821190	0.1609223	0.0070912
MARS	1994-06-01 05:48	63.0	0.0179115	0.0178819	0.0000445
EARTH	2014-11-08 01:43	11.0	0.1710005	0.1705837	0.0001389
EARTH	2016-11-21 00:06	< 1 min	0.0060204	0.0060191	0.0000004
EARTH	2018-12-28 17:22	67.8	0.1349597	0.1348121	0.0000492
EARTH	2021-02-13 01:09	127.1	0.1302547	0.1299268	0.0001093
EARTH	2023-03-19 16:37	52.3	0.0461791	0.0455789	0.0002035
EARTH	2077-11-08 12:49	293.8	0.1717390	0.1606331	0.0037021
EARTH	2079-11-25 17:18	674.6	0.0293857	0.0197516	0.0032557
EARTH	2082-01-15 16:37	187.7	0.1485668	0.1483630	0.0000679
EARTH	2084-03-10 00:56	631.9	0.0623355	0.0562552	0.0020974
EARTH	2086-03-30 10:53	467.1	0.1695143	0.1516959	0.0059586

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
323.57913135	318.13391934	0.00633458	MINIMUM
37.63530386	74.02482892	0.03929918	MINIMUM
1.22545083	17.04288307	0.15027495	SADDLE
180.27937556	195.60406746	1.35463804	SADDLE
0.66338706	196.10513668	1.85644082	SADDLE
180.17626665	15.53846349	3.35395919	MAXIMUM

Download:

MOID Plots

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