Asteroids

2013YP139 help

Last update: 2026-06-16 12:46 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.761

Aphelion (Q)

4.038

Eccentricity (e)

0.683

Inclination (i)

0.8

deg

Orbit period (P)

1357.3

Earth MOID

0.00403

U parameter

0.9

Next Earth close approach

Date

2069-12-12

Nominal distance (from Earth center)

0.00791

1183268

Maximum Brightness

12.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

968

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2013-12-29

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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

2.399086

1-sigma variation

7.125E-8

Unit

Eccentricity (e)

Value

0.682963

1-sigma variation

0.000001

Unit

Inclination (i)

Value

0.8164

1-sigma variation

3.054E-5

Unit

Long. of Ascending Node (Ω)

Value

291.8794

1-sigma variation

0.0005

Unit

Arg. of Perihelion (ω)

Value

83.8039

1-sigma variation

0.0005

Unit

Mean Anomaly (M)

Value

136.71651

1-sigma variation

0.00006

Unit

Perihelion distance

Value

0.760598

1-sigma variation

Unit

Aphelion distance

Value

4.037573

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.173701

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.400687

1-sigma variation

Unit

MOID

Value

0.004027

1-sigma variation

Unit

Orbit Period

Value

1357.2725

1-sigma variation

Unit

U parameter

Value

0.9

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	5.07601E-15	3.58418E-14	-2.37060E-14	-3.07703E-12	-5.68767E-12	-4.39689E-12
e	3.58418E-14	2.58515E-13	1.23034E-12	-4.05000E-11	-2.52586E-11	-3.07185E-11
i	-2.37060E-14	1.23034E-12	9.32917E-10	-1.19358E-8	1.15574E-8	1.88912E-11
Ω	-3.07703E-12	-4.05000E-11	-1.19358E-8	2.79133E-7	-2.67459E-7	2.59153E-9
ω	-5.68767E-12	-2.52586E-11	1.15574E-8	-2.67459E-7	2.75113E-7	4.60683E-9
M	-4.39689E-12	-3.07185E-11	1.88912E-11	2.59153E-9	4.60683E-9	3.85024E-9

Date of computation: 2026-06-16 12:46 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

20.997

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.011

Unit

Source

[2]

Diameter

Value

968

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.) Mainzer, A. et al. (2014) Astrophys. J. 792, 30. (Initial Performance of the NEOWISE Reactivation Mission) (prel.diameters & albedos for 61 NEOs)

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

4231

Unit

Source

[1]

Unobserved

Value

4541

Unit

Source

[1]

Normalized RMS of residuals

Value

0.428563

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2002-06-29.27571

Unit

Source

[2]

Last Observation

Value

2014-01-28.26916

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

47 (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

Filters

Initial Date: *

Final Date: *

Normalised Only accepted

Max residual (arcsec):

* - these fields are required

Plot

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

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Time step:*

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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 2013YP139 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	1965-07-19 22:27	3.5	0.1532050	0.1530909	0.0000380
EARTH	1976-09-03 03:48	1.7	0.1929024	0.1928946	0.0000026
EARTH	1987-12-13 11:27	3.4	0.0505333	0.0504406	0.0000309
EARTH	2002-08-03 20:39	< 1 min	0.0105808	0.0105784	0.0000008
EARTH	2069-12-12 02:37	1.4	0.0079097	0.0078826	0.0000090
EARTH	2084-12-17 15:38	42.1	0.0701196	0.0688174	0.0004341
EARTH	2099-12-16 06:03	14.2	0.0336087	0.0332143	0.0001315
EARTH	2118-07-23 23:40	126.4	0.1746476	0.1700634	0.0015281

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
327.61082579	204.08774904	0.00402743	MINIMUM
30.35024159	335.68061568	0.00753703	MINIMUM
358.66447429	269.45637336	0.23965204	SADDLE
358.65857165	89.44236679	1.76069805	SADDLE
179.74743284	90.93171028	3.03734733	SADDLE
179.74680508	270.93156596	5.03720868	MAXIMUM

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MOID Plots

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