Asteroids

2013XY8 help

Last update: 2026-06-04 23:11 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.950

Aphelion (Q)

3.463

Eccentricity (e)

0.569

Inclination (i)

1.8

deg

Orbit period (P)

1197.1

Earth MOID

0.00026

U parameter

2.5

Next Earth close approach

Date

2050-02-09

Nominal distance (from Earth center)

0.04604

6886843

Maximum Brightness

20.5

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

24.9

mag

Diameter

28 - 60*

Taxonomic type

Rotation period (T)

0.06055

Discovery Information

Discovery Date

2013-12-07

Observatory

University of Arizona Catalina Sky 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

2.206437

1-sigma variation

0.000001

Unit

Eccentricity (e)

Value

0.569473

1-sigma variation

1.472E-7

Unit

Inclination (i)

Value

1.8108

1-sigma variation

8.808E-6

Unit

Long. of Ascending Node (Ω)

Value

80.8821

1-sigma variation

1.334E-5

Unit

Arg. of Perihelion (ω)

Value

24.9675

1-sigma variation

2.054E-5

Unit

Mean Anomaly (M)

Value

285.94734

1-sigma variation

0.00072

Unit

Perihelion distance

Value

0.949930

1-sigma variation

Unit

Aphelion distance

Value

3.462944

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.001299

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

2.063784

1-sigma variation

Unit

MOID

Value

0.000262

1-sigma variation

Unit

Orbit Period

Value

1197.1147

1-sigma variation

Unit

U parameter

Value

2.5

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	5.93193E-13	1.13319E-13	-6.17177E-13	2.28090E-12	-1.41202E-11	-5.57846E-10
e	1.13319E-13	2.16772E-14	-1.64200E-13	4.97986E-13	-2.73380E-12	-1.06571E-10
i	-6.17177E-13	-1.64200E-13	7.75806E-11	-1.04271E-10	7.59858E-11	5.86838E-10
Ω	2.28090E-12	4.97986E-13	-1.04271E-10	1.77979E-10	-1.70370E-10	-2.15338E-9
ω	-1.41202E-11	-2.73380E-12	7.59858E-11	-1.70370E-10	4.21698E-10	1.32837E-8
M	-5.57846E-10	-1.06571E-10	5.86838E-10	-2.15338E-9	1.32837E-8	5.24606E-7

Date of computation: 2026-06-04 23:11 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

0.06055

Unit

Source

[1]

Quality

Value

Unit

Source

[1]

Amplitude

Value

0.13-0.47

Unit

mag

Source

[1]

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

24.914

Unit

mag

Source

[2]

Slope Parameter (G)

Value

0.15**

Unit

Source

[2]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[3]

Diameter

Value

28 - 60*

Unit

Source

[3]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

Unit

mag

Source

[-]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Radar R

Unit

Source

[4]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) Warner, B.D. (2014) MPB 41,113-124. (NEAR-EARTH ASTEROID LIGHTCURVE ANALYSIS AT CS3-PALMER DIVIDE STATION: 2013 SEPTEMBER-DECEMBER)(LCs of 36 NEAs) 2.) Carbognani, A. (2013) href="http://www.fis.unipr.it/~albino/asteroidi/lightcurve/2013_XY8.png"> Composite Lightcurve of 2013 XY8 3.) Carbognani, A. (2014) MPB 41, 265-270. (ASTEROIDS LIGHTCURVES AT OAVDA: 2013 DECEMBER - 2014 JUNE) (21374, 53435,143649,242708,243566,251346,2013XY8,2014CU13)
[2]	ESA Aegis	ESA orbit determination and impact monitoring system
[3]	Estimation	Estimated from absolute magnitude
[4]	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

Unit

Source

[1]

Unobserved

Value

4558

Unit

Source

[1]

Normalized RMS of residuals

Value

0.561682

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2013-12-07.17005

Unit

Source

[2]

Last Observation

Value

2013-12-13.22579

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

248 (4)

Unit

Source

[1]

Radar Summary

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

Radar

Value

Unit

Source

First Observation

Value

2013-12-10

Unit

Source

[3]

Last Observation

Value

2013-12-13

Unit

Source

[3]

Delay (Discarded)

Value

7 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

2 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

9 (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 2013XY8 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	2003-11-22 21:59	4.4	0.1135887	0.1134906	0.0000327
EARTH	2013-12-11 11:15	< 1 s	0.0050843	0.0050843	0.0000000
MARS	2014-04-20 08:49	< 1 min	0.0297748	0.0297736	0.0000004
EARTH	2050-02-09 13:48	22.7	0.0460357	0.0458124	0.0000745
EARTH	2073-01-09 21:42	87.5	0.0351912	0.0351836	0.0000026
EARTH	2095-12-11 17:55	12.9	0.0023523	0.0022519	0.0000335
EARTH	2118-02-11 04:27	> 1 w	0.0407813	0.0258127	0.0472419

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
346.53204389	339.47500699	0.00019741	MINIMUM
12.95179800	28.49698350	0.02392308	MINIMUM
1.16769226	6.63120227	0.03617357	SADDLE
0.14226942	184.70578868	1.96811343	SADDLE
180.04669234	184.56907180	2.44532351	SADDLE
180.02526040	4.55700608	4.44683590	MAXIMUM

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MOID Plots

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