Asteroids

2013UG1 help

Last update: 2025-09-10 00:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.412

Aphelion (Q)

1.183

Eccentricity (e)

0.483

Inclination (i)

10.7

deg

Orbit period (P)

260.2

Earth MOID

0.00094

U parameter

0.0

Next Earth close approach

Date

2028-10-26

Nominal distance (from Earth center)

0.14637

21897099

Maximum Brightness

20.1

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

22.5

mag

Diameter

90 - 190*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2013-10-22

Observatory

MASTER-II Observatory, Tunka

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

0.797651

1-sigma variation

5.626E-10

Unit

Eccentricity (e)

Value

0.483382

1-sigma variation

2.279E-7

Unit

Inclination (i)

Value

10.6996

1-sigma variation

1.621E-5

Unit

Long. of Ascending Node (Ω)

Value

24.4397

1-sigma variation

6.454E-6

Unit

Arg. of Perihelion (ω)

Value

216.5471

1-sigma variation

7.077E-6

Unit

Mean Anomaly (M)

Value

84.14889

1-sigma variation

0.00003

Unit

Perihelion distance

Value

0.412081

1-sigma variation

Unit

Aphelion distance

Value

1.183221

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.002640

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.564189

1-sigma variation

Unit

MOID

Value

0.000938

1-sigma variation

Unit

Orbit Period

Value

260.2062

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.16500E-19	3.34625E-17	5.82565E-15	1.66679E-15	-1.52176E-15	-5.99917E-15
e	3.34625E-17	5.19374E-14	1.12680E-12	-4.76152E-14	5.97183E-13	-7.43392E-12
i	5.82565E-15	1.12680E-12	2.62862E-10	7.44685E-11	-6.97354E-11	-1.64628E-10
Ω	1.66679E-15	-4.76152E-14	7.44685E-11	4.16597E-11	-3.67750E-11	-1.32949E-11
ω	-1.52176E-15	5.97183E-13	-6.97354E-11	-3.67750E-11	5.00808E-11	-9.32063E-11
M	-5.99917E-15	-7.43392E-12	-1.64628E-10	-1.32949E-11	-9.32063E-11	1.14189E-9

Date of computation: 2025-09-10 00:30 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

22.463

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

90 - 190*

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

3666

Unit

Source

[1]

Unobserved

Value

682

Unit

Source

[1]

Normalized RMS of residuals

Value

0.48202

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2013-10-22.51742

Unit

Source

[2]

Last Observation

Value

2023-11-05.271378

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

346 (3)

Unit

Source

[1]

Radar Summary

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

Radar

Value

Unit

Source

First Observation

Value

2018-10-16

Unit

Source

[3]

Last Observation

Value

2018-10-16

Unit

Source

[3]

Delay (Discarded)

Value

0 (0)

Unit

Source

[-]

Doppler (Discarded)

Value

1 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

1 (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

Close Approaches for 2013UG1 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	1954-11-04 19:48	49.8	0.1896339	0.1893197	0.0001047
MERCURY	1958-11-08 14:20	24.4	0.0461861	0.0455419	0.0002165
MERCURY	1960-03-26 02:53	60.7	0.0475240	0.0469985	0.0001754
VENUS	1964-08-12 06:57	9.7	0.0446050	0.0441419	0.0001550
EARTH	1969-12-24 16:13	12.9	0.1882245	0.1881346	0.0000300
EARTH	1971-10-19 07:33	2.3	0.1151006	0.1148907	0.0000700
EARTH	1974-12-30 18:09	< 1 min	0.1722300	0.1722176	0.0000041
MERCURY	1975-11-14 02:02	1.1	0.0398178	0.0397698	0.0000160
EARTH	1976-10-17 04:20	< 1 s	0.0021940	0.0021940	0.0000000
EARTH	1981-10-20 13:29	< 1 min	0.0919988	0.0919974	0.0000005
EARTH	1986-10-31 04:23	< 1 min	0.1698868	0.1698857	0.0000003
MERCURY	1991-07-11 03:23	< 1 min	0.0416117	0.0416098	0.0000006
MERCURY	2005-02-04 08:27	< 1 min	0.0465644	0.0465638	0.0000002
MERCURY	2006-06-23 17:23	< 1 min	0.0492133	0.0492121	0.0000004
EARTH	2006-12-25 20:24	< 1 min	0.1911933	0.1911922	0.0000003
EARTH	2008-10-18 17:52	< 1 s	0.1156217	0.1156213	0.0000001
EARTH	2011-12-31 06:04	< 1 s	0.1784281	0.1784274	0.0000002
EARTH	2013-10-17 13:08	< 1 s	0.0115334	0.0115333	0.0000000
EARTH	2016-12-30 08:52	< 1 min	0.1977954	0.1977945	0.0000003
EARTH	2018-10-18 02:44	< 1 s	0.0267522	0.0267520	0.0000000
MERCURY	2022-03-10 03:37	< 1 min	0.0385542	0.0385538	0.0000001
MERCURY	2023-07-27 07:36	< 1 min	0.0331184	0.0331171	0.0000004
EARTH	2023-10-20 20:36	< 1 s	0.0876430	0.0876429	0.0000000
EARTH	2028-10-26 11:51	< 1 min	0.1463731	0.1463729	0.0000001
EARTH	2033-11-05 14:57	< 1 min	0.1941491	0.1941489	0.0000001
MERCURY	2038-07-28 13:28	< 1 min	0.0421221	0.0421215	0.0000002
MERCURY	2039-12-15 11:40	< 1 min	0.0491288	0.0491275	0.0000004
MERCURY	2040-08-27 15:33	< 1 min	0.0465996	0.0465976	0.0000007
MERCURY	2054-12-13 11:31	< 1 min	0.0421798	0.0421793	0.0000002
EARTH	2055-10-20 22:51	< 1 s	0.1617505	0.1617498	0.0000002
MERCURY	2057-01-12 16:13	< 1 s	0.0446152	0.0446137	0.0000005
EARTH	2058-12-29 23:26	< 1 min	0.1802030	0.1802021	0.0000003
EARTH	2060-10-18 04:42	< 1 s	0.0791495	0.0791487	0.0000003
EARTH	2063-12-31 18:40	< 1 s	0.1815873	0.1815867	0.0000002
EARTH	2065-10-17 18:28	< 1 s	0.0072662	0.0072654	0.0000003
EARTH	2068-12-31 16:30	< 1 min	0.1831887	0.1831868	0.0000007
EARTH	2070-10-18 04:42	< 1 min	0.0392825	0.0392725	0.0000033
EARTH	2073-12-31 22:51	< 1 min	0.1778239	0.1778230	0.0000003
MERCURY	2074-03-21 03:58	< 1 min	0.0451671	0.0451550	0.0000040
MERCURY	2074-12-04 22:58	1.3	0.0461377	0.0461282	0.0000032
EARTH	2075-10-19 04:37	< 1 min	0.0866849	0.0866696	0.0000051
MERCURY	2076-04-28 00:39	1.7	0.0479193	0.0479057	0.0000045
MERCURY	2077-01-10 23:54	< 1 min	0.0268441	0.0268351	0.0000030
EARTH	2078-12-30 10:39	< 1 min	0.1832456	0.1832413	0.0000014
EARTH	2080-10-19 18:57	< 1 min	0.1419519	0.1419332	0.0000063
EARTH	2083-12-25 11:23	1.1	0.1999214	0.1999140	0.0000025
MERCURY	2099-12-27 11:47	1.2	0.0422355	0.0422168	0.0000063
MERCURY	2100-09-12 16:07	2.3	0.0459538	0.0459370	0.0000056
MERCURY	2102-10-21 18:42	1.5	0.0261332	0.0261263	0.0000023
VENUS	2103-08-25 02:16	< 1 min	0.0323465	0.0323375	0.0000030
EARTH	2113-11-04 06:34	3.1	0.1860150	0.1859928	0.0000074
EARTH	2118-10-28 15:24	2.8	0.1505776	0.1505442	0.0000111
EARTH	2123-10-23 18:20	1.9	0.1086407	0.1085983	0.0000141
MERCURY	2125-10-05 19:14	2.1	0.0474773	0.0474284	0.0000163

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
121.08717332	282.80465258	0.00109893	MINIMUM
240.77372594	356.72247747	0.17718596	MINIMUM
189.71509003	324.45483609	0.23391282	SADDLE
5.46537488	146.21260109	0.60599582	SADDLE
3.71072732	323.18490910	1.39727239	SADDLE
180.15058118	138.89189818	2.19204836	MAXIMUM

Download:

MOID Plots

Click on the images to zoom-in and zoom-out