Asteroids

2021GU6 help

Last update: 2024-04-18 21:05 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Aten

Perihelion (q)

0.377

Aphelion (Q)

1.063

Eccentricity (e)

0.476

Inclination (i)

15.5

deg

Orbit period (P)

223.1

Earth MOID

0.02616

U parameter

7.4

Next Earth close approach

Date

2032-04-14

Nominal distance (from Earth center)

0.03004

4493364

Maximum Brightness

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

26.3

mag

Diameter

15 - 30*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2021-04-10

Observatory

Mt. Lemmon Survey

Orbit Visualiser

Click the button to start Orbit Visualiser

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

60400.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.719839

1-sigma variation

0.000086

Unit

Eccentricity (e)

Value

0.476152

1-sigma variation

0.000253

Unit

Inclination (i)

Value

15.4530

1-sigma variation

0.0152

Unit

Long. of Ascending Node (Ω)

Value

19.9452

1-sigma variation

0.0002

Unit

Arg. of Perihelion (ω)

Value

346.7945

1-sigma variation

0.0010

Unit

Mean Anomaly (M)

Value

165.79031

1-sigma variation

0.33140

Unit

Perihelion distance

Value

0.377087

1-sigma variation

Unit

Aphelion distance

Value

1.062592

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.616660

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.035904

1-sigma variation

Unit

MOID

Value

0.026164

1-sigma variation

Unit

Orbit Period

Value

223.0755

1-sigma variation

Unit

U parameter

Value

7.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	7.45016E-9	-2.18534E-8	-1.30816E-6	-1.49670E-8	8.11018E-8	-2.86041E-5
e	-2.18534E-8	6.41164E-8	3.83767E-6	4.38927E-8	-2.39633E-7	8.39088E-5
i	-1.30816E-6	3.83767E-6	2.29731E-4	2.62856E-6	-1.42957E-5	5.02270E-3
Ω	-1.49670E-8	4.38927E-8	2.62856E-6	3.01318E-8	-1.61707E-7	5.74607E-5
ω	8.11018E-8	-2.39633E-7	-1.42957E-5	-1.61707E-7	1.09409E-6	-3.11991E-4
M	-2.86041E-5	8.39088E-5	5.02270E-3	5.74607E-5	-3.11991E-4	1.09824E-1

Date of computation: 2024-02-21 14:29 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

26.3

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

15 - 30*

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 ODIM	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

1102

Unit

Source

[1]

Normalized RMS of residuals

Value

0.572752

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2021-04-10.335075

Unit

Source

[2]

Last Observation

Value

2021-04-13.177764

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

32 (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

Unit

Source

[3]

Last Observation

Value

Unit

Source

[3]

Delay (Discarded)

Value

0 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[1]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA ODIM	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 2021GU6 from 1950 to 2124

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possibile distance in au	Distance uncert. in au
EARTH	1952-03-17 12:21	1251.1	0.1331461	0.1236525	0.0035224
MERCURY	1958-08-30 12:44	> 1 d	0.0365764	0.0164177	0.0297222
EARTH	1960-04-16 17:19	269.5	0.0859511	0.0422735	0.0160783
EARTH	1963-03-28 13:38	> 1 d	0.1009552	0.0815242	0.0078144
MERCURY	1967-10-24 20:11	> 1 d	0.0277128	0.0178000	0.0312212
EARTH	1971-04-17 04:41	484.8	0.1766977	0.1138787	0.0212859
EARTH	1974-04-07 21:53	> 1 d	0.0570420	0.0332082	0.0121928
MERCURY	1976-12-18 18:37	> 1 d	0.0294153	0.0174865	0.0344379
EARTH	1977-03-11 03:05	1361.1	0.1689061	0.1424951	0.0113300
EARTH	1985-04-14 16:03	1220.1	0.0285882	0.0253693	0.0066344
MERCURY	1986-02-12 13:13	> 1 d	0.0279583	0.0172352	0.0257253
EARTH	1988-03-18 17:35	> 1 d	0.1286503	0.1143335	0.0061151
MERCURY	1995-04-09 12:41	> 1 d	0.0305602	0.0168308	0.0291488
EARTH	1996-04-16 23:05	174.1	0.0986076	0.0523085	0.0164518
EARTH	1999-03-30 06:01	> 1 d	0.0950308	0.0770977	0.0069758
MERCURY	2004-06-03 01:49	> 1 d	0.0263707	0.0174935	0.0201378
EARTH	2007-04-17 04:43	277.2	0.1861446	0.1497606	0.0122079
EARTH	2010-04-08 10:40	> 1 d	0.0549863	0.0405458	0.0054698
EARTH	2013-03-10 22:01	426.3	0.1708225	0.1597147	0.0039495
EARTH	2021-04-12 12:36	< 1 min	0.0300939	0.0300296	0.0000214
MERCURY	2021-07-03 08:41	105.9	0.0454136	0.0440874	0.0004436
EARTH	2024-03-13 11:54	320.9	0.1496385	0.1461987	0.0011950
EARTH	2032-04-14 16:27	734.1	0.0300363	0.0264116	0.0040774
EARTH	2035-03-18 19:54	> 1 d	0.1303629	0.1185053	0.0049416
EARTH	2043-04-17 20:13	401.6	0.0867258	0.0351601	0.0205586
EARTH	2046-03-28 00:15	> 1 d	0.1015525	0.0810933	0.0093681
EARTH	2054-04-17 09:52	551.2	0.1679218	0.0837154	0.0290096
EARTH	2057-04-07 05:09	> 1 d	0.0600065	0.0368820	0.0158387
EARTH	2060-03-10 21:12	> 1 d	0.1701466	0.1389290	0.0157353
EARTH	2068-04-13 22:08	> 1 d	0.0268626	0.0266583	0.0023843
EARTH	2071-03-17 10:41	> 1 d	0.1347131	0.1170154	0.0111505
MERCURY	2075-03-19 18:32	> 1 w	0.0429651	0.0011390	0.0520391
EARTH	2079-04-17 18:09	1082.7	0.0775685	0.0320286	0.0377528
EARTH	2082-03-26 23:14	> 1 d	0.1042016	0.0831275	0.0167098
MERCURY	2084-05-14 13:38	> 1 w	0.0378690	0.0046868	0.0654788
EARTH	2090-04-17 18:06	635.2	0.1542737	0.0405443	0.0456848
EARTH	2093-04-04 22:10	> 1 d	0.0714660	0.0457041	0.0224805
MERCURY	2093-07-12 12:33	> 1 w	0.0205470	0.0174146	0.0410178
EARTH	2096-03-09 18:57	> 1 d	0.1866438	0.1416424	0.0306927
MERCURY	2102-09-10 07:20	> 1 d	0.0406852	0.0144110	0.1075816
EARTH	2104-04-12 05:02	> 1 d	0.0378018	0.0292452	0.0268599
EARTH	2107-03-14 17:57	> 1 d	0.1528128	0.1288982	0.0264059
EARTH	2115-04-17 01:22	> 1 d	0.0348636	0.0281640	0.0289867
EARTH	2118-03-21 08:59	> 1 d	0.1236977	0.1073837	0.0198986

Download as: