Asteroids

523972 1999CW8 help

Last update: 2024-05-04 15:01 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.898

Aphelion (Q)

3.576

Eccentricity (e)

0.599

Inclination (i)

33.6

deg

Orbit period (P)

1221.9

Earth MOID

0.23399

U parameter

0.0

Next Earth close approach

Date

Nominal distance (from Earth center)

Maximum Brightness

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

18.6

mag

Diameter

2100

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

1999-02-12

Observatory

Lincoln Laboratory ETS, New Mexico

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

2.236814

1-sigma variation

5.980E-9

Unit

Eccentricity (e)

Value

0.598657

1-sigma variation

4.605E-8

Unit

Inclination (i)

Value

33.6156

1-sigma variation

2.313E-5

Unit

Long. of Ascending Node (Ω)

Value

316.9156

1-sigma variation

1.030E-5

Unit

Arg. of Perihelion (ω)

Value

262.1672

1-sigma variation

2.346E-5

Unit

Mean Anomaly (M)

Value

164.42987

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.897731

1-sigma variation

Unit

Aphelion distance

Value

3.575897

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.549250

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.341198

1-sigma variation

Unit

MOID

Value

0.233994

1-sigma variation

Unit

Orbit Period

Value

1221.9213

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.57640E-17	2.03262E-16	3.13006E-15	9.25444E-15	8.34773E-14	-7.52313E-14
e	2.03262E-16	2.12050E-15	1.70601E-13	1.84615E-14	6.59749E-13	-4.81768E-13
i	3.13006E-15	1.70601E-13	5.35110E-10	-1.19762E-10	2.26118E-10	-8.99892E-11
Ω	9.25444E-15	1.84615E-14	-1.19762E-10	1.06170E-10	-1.02160E-10	6.25195E-12
ω	8.34773E-14	6.59749E-13	2.26118E-10	-1.02160E-10	5.50250E-10	-3.00230E-10
M	-7.52313E-14	-4.81768E-13	-8.99892E-11	6.25195E-12	-3.00230E-10	2.14695E-10

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

[1]

Taxonomy (all)

Value

Unit

Source

[1]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

18.629

Unit

mag

Source

[2]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[2]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.015

Unit

Source

[3]

Diameter

Value

2100

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

Visual S

Unit

Source

[1]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) Binzel, R.P. et al. (2004) Icarus 170, 259-294. (Observed spectral properties of near-Earth objects: results for population distribution, source regions, and space weathering processes.)
[2]	ESA ODIM	ESA orbit determination and impact monitoring system
[3]	EARN	1.) Joseph R. Masiero et al 2021 Planet. Sci. J. 2 162

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

7506

Unit

Source

[1]

Unobserved

Value

1708

Unit

Source

[1]

Normalized RMS of residuals

Value

0.567197

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1999-02-12.19423

Unit

Source

[2]

Last Observation

Value

2019-09-01.24387

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

217 (2)

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

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Final Date: *

Output option:

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