Asteroids

153814 2001WN5 help

Last update: 2026-09-17 13:16 UTC

Orbital Properties

Epoch

61400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.912

Aphelion (Q)

2.512

Eccentricity (e)

0.467

Inclination (i)

1.9

deg

Orbit period (P)

818.2

Earth MOID

0.00141

U parameter

0.0

Next Earth close approach

Date

2028-06-26

Nominal distance (from Earth center)

0.00166

248712

Maximum Brightness

6.9

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

18.3

mag

Diameter

940

Taxonomic type

Rotation period (T)

4.259

Discovery Information

Discovery Date

2001-11-20

Observatory

Lowell Observatory-LONEOS

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

61400.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.712030

1-sigma variation

8.678E-10

Unit

Eccentricity (e)

Value

0.467235

1-sigma variation

6.658E-9

Unit

Inclination (i)

Value

1.9201

1-sigma variation

1.653E-6

Unit

Long. of Ascending Node (Ω)

Value

277.3341

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

44.6906

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

102.60958

1-sigma variation

1.377E-6

Unit

Perihelion distance

Value

0.912110

1-sigma variation

Unit

Aphelion distance

Value

2.511951

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.010752

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

1.022296

1-sigma variation

Unit

MOID

Value

0.001414

1-sigma variation

Unit

Orbit Period

Value

818.2115

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	7.53142E-19	-2.79938E-18	6.77481E-16	-3.58943E-14	3.52258E-14	-8.47729E-16
e	-2.79938E-18	4.43266E-17	-8.31971E-15	4.06223E-13	-4.16691E-13	6.72964E-15
i	6.77481E-16	-8.31971E-15	2.73123E-12	-3.58014E-11	3.78152E-11	-1.70299E-12
Ω	-3.58943E-14	4.06223E-13	-3.58014E-11	5.96903E-9	-6.01969E-9	4.67629E-11
ω	3.52258E-14	-4.16691E-13	3.78152E-11	-6.01969E-9	6.07639E-9	-4.77899E-11
M	-8.47729E-16	6.72964E-15	-1.70299E-12	4.67629E-11	-4.77899E-11	1.89501E-12

Date of computation: 2026-09-17 13:16 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

4.259

4.253

Unit

Source

[1]

[2]

Quality

Value

Unit

Source

[-]

Amplitude

Value

0.63

0.19

Unit

mag

Source

[2]

[1]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

Unit

Source

[1]

Spinvector B

Value

Unit

Source

[1]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

K/L/Sq

Unit

Source

[3]

[4]

Taxonomy (all)

Value

K/L/Sq

Unit

Source

[5]

[4]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

18.328

Unit

mag

Source

[6]

Slope Parameter (G)

Value

0.15**

Unit

Source

[6]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.097

0.106

Unit

Source

[8]

[7]

Diameter

Value

940

Unit

Source

[7]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

Unit

mag

Source

[-]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Visual S

Radar R

Unit

Source

[4]

[9]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) Near-Earth Asteroid Lightcurve Analysis at the Center for Solar System Studies: 2019 September-2020 January, B.D. Warner
[2]	EARN	1.) Lowell Observatory Near-Earth Asteroid Photometric Survey (NEAPS): Paper 4. Skiff, Brian A et al.
[3]	EARN	1.) Michaël Marsset et al 2022 AJ 163 165
[4]	EARN	1.) Thomas, C.A. et al. (2014) Icarus 228, 217-246. (Physical characterization of Warm Spitzer-observed near-Earth objects)
[5]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[6]	ESA Aegis	ESA orbit determination and impact monitoring system
[7]	EARN	1.) Joseph R. Masiero et al 2021 Planet. Sci. J. 2 162
[8]	EARN	1.) Mainzer, A. et al. (2011) ApJ 743, 156. (NEOWISE Observations of Near-Earth Objects: Preliminary Results) (albedo and diameters of 428 NEOs) 2.) Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; et al. (2011) Astrophys. J. 741, A90. See also Grav 2012b and Masiero 2012.
[9]	EARN	1.) href="http://echo.jpl.nasa.gov/asteroids/index.html">JPL's NEO Radar Detection Program Webpage

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

11176

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.525849

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1996-02-10.39593

Unit

Source

[2]

Last Observation

Value

2026-09-16.62716

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

1032 (8)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

2010-10-29

Unit

Source

[3]

Last Observation

Value

2019-08-24

Unit

Source

[3]

Delay (Discarded)

Value

4 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

4 (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

Filters

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Final Date: *

Normalised Only accepted

Max residual (arcsec):

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Computation parameters

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Final Date: *

Output option:

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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 153814 2001WN5 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	1963-09-30 11:51	< 1 s	0.0352536	0.0352534	0.0000000
EARTH	1972-07-28 12:50	< 1 min	0.0950108	0.0950108	0.0000000
EARTH	1981-06-16 14:42	< 1 min	0.0834207	0.0834202	0.0000002
EARTH	2010-10-10 07:00	< 1 s	0.1072803	0.1072801	0.0000000
EARTH	2019-08-27 07:14	< 1 s	0.0975689	0.0975689	0.0000000
MARS	2026-08-27 04:44	< 1 s	0.0371838	0.0371836	0.0000001
EARTH	2028-06-26 05:22	< 1 s	0.0016625	0.0016624	0.0000001
MARS	2039-10-29 20:35	5.8	0.0144098	0.0143128	0.0000328
EARTH	2052-08-02 10:03	168.8	0.1016957	0.1014623	0.0000778
EARTH	2076-09-20 23:20	185.1	0.0638516	0.0628806	0.0003257
EARTH	2087-06-12 03:43	53.1	0.1629348	0.1611605	0.0005914
EARTH	2100-10-03 12:04	74.7	0.0421905	0.0420320	0.0000575
EARTH	2111-06-20 05:49	146.1	0.0747509	0.0713439	0.0011357
EARTH	2124-10-09 07:48	65.3	0.0669758	0.0659315	0.0003498

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
330.67048971	171.99475480	0.00141384	MINIMUM
27.15292944	263.64700766	0.03356958	MINIMUM
359.42396225	218.72196627	0.10181395	SADDLE
179.61852489	38.59504388	1.52564772	SADDLE
358.89182482	37.81117685	1.89866729	SADDLE
179.55116352	218.54909448	3.52318836	MAXIMUM

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MOID Plots

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