Asteroids

2016WF9 help

Last update: 2025-09-10 00:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.954

Aphelion (Q)

4.744

Eccentricity (e)

0.665

Inclination (i)

15.2

deg

Orbit period (P)

1756.5

Earth MOID

0.01235

U parameter

0.0

Next Earth close approach

Date

2045-12-30

Nominal distance (from Earth center)

0.13935

20845801

Maximum Brightness

20.1

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

20.2

mag

Diameter

890

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2016-11-27

Observatory

WISE

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

2.849033

1-sigma variation

1.786E-8

Unit

Eccentricity (e)

Value

0.665019

1-sigma variation

2.263E-8

Unit

Inclination (i)

Value

15.1825

1-sigma variation

4.587E-6

Unit

Long. of Ascending Node (Ω)

Value

125.1592

1-sigma variation

2.132E-5

Unit

Arg. of Perihelion (ω)

Value

342.9180

1-sigma variation

2.143E-5

Unit

Mean Anomaly (M)

Value

295.43165

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.954371

1-sigma variation

Unit

Aphelion distance

Value

4.743696

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.013502

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

3.345426

1-sigma variation

Unit

MOID

Value

0.012352

1-sigma variation

Unit

Orbit Period

Value

1756.4861

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.18810E-16	-1.16311E-17	-4.32057E-15	9.81548E-14	5.41179E-14	-1.04158E-13
e	-1.16311E-17	5.12268E-16	-1.45150E-14	9.69652E-14	-2.21982E-14	2.81586E-15
i	-4.32057E-15	-1.45150E-14	2.10363E-11	8.51448E-12	-1.09056E-11	1.23329E-12
Ω	9.81548E-14	9.69652E-14	8.51448E-12	4.54672E-10	-3.82244E-10	-2.39942E-11
ω	5.41179E-14	-2.21982E-14	-1.09056E-11	-3.82244E-10	4.59276E-10	-3.08626E-11
M	-1.04158E-13	2.81586E-15	1.23329E-12	-2.39942E-11	-3.08626E-11	3.60004E-11

Date of computation: 2025-09-10 00:30 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

20.182

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.0125

0.023

Unit

Source

[3]

[2]

Diameter

Value

890

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]	EARN	1.) Joseph R. Masiero et al 2020 Planet. Sci. J. 1 5
[3]	EARN	1.) Masiero, J.R. et al. (2018) Astron. J. 154_168(10pp). (NEOWISE Reactivation Mission Year Three: Asteroid Diameters and Albedos) (170NEOs, 6110MBAs)

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

2001

Unit

Source

[1]

Unobserved

Value

1270

Unit

Source

[1]

Normalized RMS of residuals

Value

0.573728

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2016-10-10.42213

Unit

Source

[2]

Last Observation

Value

2022-04-03.355808

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

188 (6)

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 2016WF9 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	1987-12-20 20:40	< 1 min	0.1968133	0.1968102	0.0000011
EARTH	2045-12-30 19:44	< 1 min	0.1393456	0.1393429	0.0000009

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
8.21510681	23.59884937	0.01194193	MINIMUM
359.41066300	185.02751997	1.96936966	SADDLE
179.68295059	186.27484998	3.73199250	SADDLE
180.23625375	6.51590261	5.72568735	MAXIMUM

Download:

MOID Plots

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