Asteroids

2021CQ5 help

Last update: 2024-05-10 22:36 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.666

Aphelion (Q)

1.614

Eccentricity (e)

0.416

Inclination (i)

4.2

deg

Orbit period (P)

444.5

Earth MOID

0.00007

U parameter

6.4

Next Earth close approach

Date

2038-02-28

Nominal distance (from Earth center)

0.19663

29415310

Maximum Brightness

28.2

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

28.5

mag

Diameter

5 - 12*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2021-02-11

Observatory

Catalina Sky 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

1.139780

1-sigma variation

0.000070

Unit

Eccentricity (e)

Value

0.415836

1-sigma variation

0.000047

Unit

Inclination (i)

Value

4.2112

1-sigma variation

0.0011

Unit

Long. of Ascending Node (Ω)

Value

143.3526

1-sigma variation

0.0025

Unit

Arg. of Perihelion (ω)

Value

96.1950

1-sigma variation

0.0015

Unit

Mean Anomaly (M)

Value

157.62563

1-sigma variation

0.07230

Unit

Perihelion distance

Value

0.665819

1-sigma variation

Unit

Aphelion distance

Value

1.613741

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.000419

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.110269

1-sigma variation

Unit

MOID

Value

0.000068

1-sigma variation

Unit

Orbit Period

Value

444.4573

1-sigma variation

Unit

U parameter

Value

6.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.94388E-9	3.31513E-9	7.53644E-8	1.72597E-7	-1.06248E-7	-5.08395E-6
e	3.31513E-9	2.22953E-9	5.06312E-8	1.15590E-7	-7.05373E-8	-3.40926E-6
i	7.53644E-8	5.06312E-8	1.15057E-6	2.62888E-6	-1.60931E-6	-7.75027E-5
Ω	1.72597E-7	1.15590E-7	2.62888E-6	6.02881E-6	-3.72494E-6	-1.77482E-4
ω	-1.06248E-7	-7.05373E-8	-1.60931E-6	-3.72494E-6	2.35971E-6	1.09236E-4
M	-5.08395E-6	-3.40926E-6	-7.75027E-5	-1.77482E-4	1.09236E-4	5.22799E-3

Date of computation: 2024-04-23 10:08 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

28.452

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

5 - 12*

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

1184

Unit

Source

[1]

Normalized RMS of residuals

Value

0.694667

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2021-02-07.284

Unit

Source

[2]

Last Observation

Value

2021-02-11.500471

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

32 (1)

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 2021CQ5 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
VENUS	1959-06-06 22:01	> 1 mo	0.0100522	0.0051360	0.8976032
EARTH	1959-08-25 07:01	> 1 mo	0.0129098	0.0099170	0.6173978
EARTH	1963-02-11 13:24	> 1 d	0.0084775	0.0015679	0.0748912
VENUS	1985-11-23 16:50	> 1 d	0.0306302	0.0021060	0.0187344
EARTH	1988-08-14 07:39	> 1 d	0.1604729	0.1095326	0.0170255
EARTH	1993-08-31 02:05	377.2	0.1019385	0.0890716	0.0042922
EARTH	1997-02-12 19:41	411.1	0.0217357	0.0049504	0.0056116
VENUS	2009-11-10 05:24	497.4	0.0352463	0.0250064	0.0034237
EARTH	2017-08-28 06:02	117.2	0.0450119	0.0402274	0.0016017
EARTH	2021-02-11 22:34	< 1 s	0.0011858	0.0011854	0.0000001
EARTH	2022-09-01 12:26	31.1	0.0222569	0.0215742	0.0002396
EARTH	2038-02-28 01:55	> 1 d	0.1966292	0.1694621	0.0090575
VENUS	2046-10-12 10:07	> 1 d	0.0060217	0.0059385	0.0018958
EARTH	2049-02-10 09:49	> 1 w	0.0415624	0.0017569	0.2355574
EARTH	2050-08-31 05:60	> 1 w	0.0290219	0.0210665	0.1879237
EARTH	2066-02-16 00:23	> 1 mo	0.0729915	0.0014435	0.9619624
EARTH	2067-09-05 17:40	> 1 mo	0.0896064	0.0214149	0.8803695
EARTH	2094-02-10 16:19	> 1 w	0.0445751	0.0021512	0.3121796
EARTH	2095-08-31 04:56	> 1 w	0.0397030	0.0217225	0.2646681
VENUS	2099-02-06 16:07	> 1 mo	0.0491024	0.0021138	0.1475965
VENUS	2100-04-16 18:25	> 1 w	0.0402084	0.0050313	0.1671326
EARTH	2111-02-13 02:20	> 1 mo	0.0180639	0.0024651	0.7996921
EARTH	2112-08-31 10:42	> 1 w	0.0486018	0.0179125	0.1822070

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