Asteroids

2013UX help

Last update: 2026-03-17 23:26 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.746

Aphelion (Q)

2.651

Eccentricity (e)

0.561

Inclination (i)

5.5

deg

Orbit period (P)

808.4

Earth MOID

0.03586

U parameter

7.7

Next Earth close approach

Date

2044-10-12

Nominal distance (from Earth center)

0.10357

15493844

Maximum Brightness

20.5

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

22.2

mag

Diameter

100 - 220*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2013-10-18

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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.698321

1-sigma variation

0.000973

Unit

Eccentricity (e)

Value

0.560764

1-sigma variation

0.000232

Unit

Inclination (i)

Value

5.4554

1-sigma variation

0.0088

Unit

Long. of Ascending Node (Ω)

Value

259.3071

1-sigma variation

0.0289

Unit

Arg. of Perihelion (ω)

Value

52.0365

1-sigma variation

0.0042

Unit

Mean Anomaly (M)

Value

278.86770

1-sigma variation

1.18600

Unit

Perihelion distance

Value

0.745964

1-sigma variation

Unit

Aphelion distance

Value

2.650677

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.149743

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.793117

1-sigma variation

Unit

MOID

Value

0.035860

1-sigma variation

Unit

Orbit Period

Value

808.4031

1-sigma variation

Unit

U parameter

Value

7.7

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	9.46081E-7	2.26004E-7	8.59506E-6	-2.80894E-5	4.12435E-6	-1.15358E-3
e	2.26004E-7	5.39911E-8	2.05336E-6	-6.71065E-6	9.85308E-7	-2.75573E-4
i	8.59506E-6	2.05336E-6	7.80952E-5	-2.55234E-4	3.74836E-5	-1.04802E-2
Ω	-2.80894E-5	-6.71065E-6	-2.55234E-4	8.34200E-4	-1.22549E-4	3.42500E-2
ω	4.12435E-6	9.85308E-7	3.74836E-5	-1.22549E-4	1.80581E-5	-5.02891E-3
M	-1.15358E-3	-2.75573E-4	-1.04802E-2	3.42500E-2	-5.02891E-3	1.40659E0

Date of computation: 2026-03-17 23:26 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

22.17

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

100 - 220*

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

4494

Unit

Source

[1]

Normalized RMS of residuals

Value

0.350694

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2013-10-18.36144

Unit

Source

[2]

Last Observation

Value

2013-11-29.18384

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

53 (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

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 2013UX 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	1951-10-21 10:19	> 1 w	0.0974673	0.0797822	0.1843855
EARTH	1960-05-24 02:10	> 1 mo	0.0754700	0.0390684	0.2541635
MARS	1960-10-23 11:49	> 1 w	0.0288685	0.0251175	0.1226222
EARTH	1982-10-10 23:24	> 1 w	0.1113473	0.0787372	0.1025148
EARTH	1991-05-18 07:40	> 1 d	0.0386750	0.0371040	0.0150544
MARS	1998-06-08 08:57	> 1 d	0.0360202	0.0227974	0.0261213
EARTH	2013-10-05 19:12	< 1 min	0.1436027	0.1434613	0.0000471
EARTH	2022-05-18 00:26	> 1 d	0.0397747	0.0358045	0.0105112
EARTH	2044-10-12 07:25	> 1 w	0.1035700	0.0774110	0.0858621
EARTH	2053-05-23 14:15	> 1 w	0.0597697	0.0350126	0.1335958
EARTH	2073-05-07 06:16	> 1 d	0.1957899	0.0378562	0.1087355
EARTH	2095-10-16 23:36	> 1 d	0.0817229	0.0761905	0.0160240
EARTH	2104-06-03 01:33	> 1 w	0.1293660	0.0399913	0.1003590
MARS	2122-07-26 11:17	> 1 w	0.0413112	0.0149690	0.1535906
EARTH	2124-05-10 07:10	> 1 w	0.1651248	0.0344984	0.2000491

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
316.67375360	135.79267916	0.03615752	MINIMUM
43.02650489	284.30926157	0.07798657	MINIMUM
0.35777522	211.26804219	0.27700459	SADDLE
179.95185698	29.68276594	1.66939511	SADDLE
359.27129906	29.15628662	1.73117307	SADDLE
179.62020542	209.50203808	3.66458987	MAXIMUM

Download:

MOID Plots

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