Asteroids

2017WM16 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Amor

Perihelion (q)

1.029

Aphelion (Q)

2.143

Eccentricity (e)

0.351

Inclination (i)

7.9

deg

Orbit period (P)

729.7

Earth MOID

0.04115

U parameter

9.0

Next Earth close approach

Date

2027-11-12

Nominal distance (from Earth center)

0.0598

8945585

Maximum Brightness

22.3

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.7

mag

Diameter

12 - 28*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2017-11-25

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

1.586185

1-sigma variation

0.039121

Unit

Eccentricity (e)

Value

0.351305

1-sigma variation

0.015611

Unit

Inclination (i)

Value

7.8678

1-sigma variation

0.0631

Unit

Long. of Ascending Node (Ω)

Value

235.8349

1-sigma variation

0.0073

Unit

Arg. of Perihelion (ω)

Value

184.5013

1-sigma variation

0.1710

Unit

Mean Anomaly (M)

Value

359.79947

1-sigma variation

11.30690

Unit

Perihelion distance

Value

1.028950

1-sigma variation

Unit

Aphelion distance

Value

2.143420

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

1.127038

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.041207

1-sigma variation

Unit

MOID

Value

0.041148

1-sigma variation

Unit

Orbit Period

Value

729.6746

1-sigma variation

Unit

U parameter

Value

9.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.53044E-3	6.10726E-4	-2.46711E-3	-2.85578E-4	6.68880E-3	-4.42334E-1
e	6.10726E-4	2.43712E-4	-9.84508E-4	-1.13961E-4	2.66919E-3	-1.76515E-1
i	-2.46711E-3	-9.84508E-4	3.97705E-3	4.60360E-4	-1.07825E-2	7.13055E-1
Ω	-2.85578E-4	-1.13961E-4	4.60360E-4	5.32898E-5	-1.24811E-3	8.25389E-2
ω	6.68880E-3	2.66919E-3	-1.07825E-2	-1.24811E-3	2.92336E-2	-1.93323E0
M	-4.42334E-1	-1.76515E-1	7.13055E-1	8.25389E-2	-1.93323E0	1.27845E2

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

26.666

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

12 - 28*

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

2921

Unit

Source

[1]

Normalized RMS of residuals

Value

0.723328

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2017-11-12.20952

Unit

Source

[2]

Last Observation

Value

2017-12-01.326675

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

21 (0)

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 2017WM16 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	2007-12-09 04:55	> 1 w	0.1378595	0.0011678	0.2838162
EARTH	2009-11-30 22:11	> 1 mo	0.0838456	0.0213541	0.1982609
EARTH	2011-11-25 00:06	> 1 w	0.0522459	0.0358436	0.0818277
EARTH	2013-11-21 07:32	> 1 w	0.0433976	0.0402051	0.0174977
EARTH	2015-11-20 05:02	> 1 d	0.0417193	0.0413207	0.0021806
EARTH	2017-11-19 01:21	< 1 min	0.0408801	0.0406793	0.0000670
EARTH	2019-11-19 15:28	> 1 d	0.0410706	0.0410439	0.0005678
EARTH	2021-11-18 13:33	> 1 w	0.0415788	0.0415147	0.0026101
EARTH	2023-11-18 06:12	> 1 w	0.0415536	0.0408325	0.0229853
EARTH	2025-11-16 01:37	> 1 mo	0.0444057	0.0397799	0.1401571
EARTH	2027-11-12 01:51	> 1 mo	0.0597975	0.0332989	0.5948409
EARTH	2029-11-04 15:25	> 1 mo	0.0978390	0.0158150	1.1470816
EARTH	2031-10-28 22:13	> 1 mo	0.1532953	0.0035657	1.4878865

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
357.47881535	314.99278022	0.04131463	MINIMUM
179.38186274	137.23730206	1.13193245	SADDLE
358.36983539	136.26685051	2.04103427	SADDLE
179.16563836	317.09519298	3.13165140	MAXIMUM

Download:

MOID Plots

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