Asteroids

136617 1994CC help

Last update: 2026-09-21 13:00 UTC

Orbital Properties

Epoch

61400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.954

Aphelion (Q)

2.321

Eccentricity (e)

0.417

Inclination (i)

4.7

deg

Orbit period (P)

765.5

Earth MOID

0.01552

U parameter

0.0

Next Earth close approach

Date

2032-09-01

Nominal distance (from Earth center)

0.11068

16557789

Maximum Brightness

15.9

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

17.9

mag

Diameter

600

Taxonomic type

Rotation period (T)

2.390

Discovery Information

Discovery Date

1994-02-03

Observatory

Steward Observatory, Kitt Peak-Spacewatch

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

61400.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.637694

1-sigma variation

5.724E-9

Unit

Eccentricity (e)

Value

0.417353

1-sigma variation

1.285E-8

Unit

Inclination (i)

Value

4.6811

1-sigma variation

2.517E-6

Unit

Long. of Ascending Node (Ω)

Value

268.5037

1-sigma variation

7.776E-6

Unit

Arg. of Perihelion (ω)

Value

24.9472

1-sigma variation

8.209E-6

Unit

Mean Anomaly (M)

Value

119.79035

1-sigma variation

0.00002

Unit

Perihelion distance

Value

0.954197

1-sigma variation

Unit

Aphelion distance

Value

2.321191

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.033411

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

1.192497

1-sigma variation

Unit

MOID

Value

0.015518

1-sigma variation

Unit

Orbit Period

Value

765.5041

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.27677E-17	5.94608E-17	-5.80793E-15	-1.48145E-14	2.70973E-14	-9.05316E-14
e	5.94608E-17	1.65020E-16	-1.48427E-14	-4.49084E-14	8.40370E-14	-1.70417E-13
i	-5.80793E-15	-1.48427E-14	6.33682E-12	-6.74592E-12	1.36238E-12	1.70975E-11
Ω	-1.48145E-14	-4.49084E-14	-6.74592E-12	6.04716E-11	-5.64264E-11	3.81466E-11
ω	2.70973E-14	8.40370E-14	1.36238E-12	-5.64264E-11	6.73818E-11	-7.56225E-11
M	-9.05316E-14	-1.70417E-13	1.70975E-11	3.81466E-11	-7.56225E-11	2.51335E-10

Date of computation: 2026-09-21 13:00 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

2.390

Unit

Source

[3]

Quality

Value

3,B,R

Unit

Source

[3]

Amplitude

Value

0.09

Unit

mag

Source

[3]

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

Sq;Sa

Unit

Source

[2]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

17.921

Unit

mag

Source

[4]

Slope Parameter (G)

Value

0.15**

Unit

Source

[4]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[-]

Diameter

Value

600

Unit

Source

[5]

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

Radar R

Unit

Source

[1]

[6]

Satellites

Satellites

Value

Unit

Source

Satellites

Value

Binary Child 1

Binary Child 2

Unit

Source

[7]

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Sources

No.	Name	Additional
[1]	EARN	1.) Thomas, C.A. et al. (2014) Icarus 228, 217-246. (Physical characterization of Warm Spitzer-observed near-Earth objects)
[2]	EARN	1.) Somers, J.M. et al. (2010) DPS 42, 1316. (abstract) (Optical Characterization Of Planetary Radar Targets, Low-deltaV, And Potentially Hazardous Asteroids: Results From 2009-2010) 2.) Thomas, C.A. et al. (2014) Icarus 228, 217-246. (Physical characterization of Warm Spitzer-observed near-Earth objects)
[3]	EARN	1.) Brozovic, M. et al. (2010) DPS 42, 5702. (abstract) (Radar Images And Shape Model Of A Triple Asteroid (136617) 1994CC) 2.) Brozovic, M. et al. (2009) I.A.U. Circ. HREF="http://www.cbat.eps.harvard.edu/iauc/09000/09053.html"> 9053. ((136617) 1994 CC) (Radar detection of triple system, sizes and rotation parameters) 3.) Pravec, P. et al (2016) Icarus 267,267-295. (Binary asteroid population. 3. Secondary rotations and elongations) (..,..)
[4]	ESA Aegis	ESA orbit determination and impact monitoring system
[5]	EARN	1.) Brozovic, M. et al. (2010) DPS 42, 5702. (abstract) (Radar Images And Shape Model Of A Triple Asteroid (136617) 1994CC) 2.) Brozovic, M. et al. (2009) I.A.U. Circ. HREF="http://www.cbat.eps.harvard.edu/iauc/09000/09053.html"> 9053. ((136617) 1994 CC) (Radar detection of triple system, sizes and rotation parameters)
[6]	EARN	1.) href="http://echo.jpl.nasa.gov/asteroids/index.html">JPL's NEO Radar Detection Program Webpage 2.) Brozovic, M. et al. (2009) I.A.U. Circ. HREF="http://www.cbat.eps.harvard.edu/iauc/09000/09053.html"> 9053. ((136617) 1994 CC) (Radar detection of triple system, sizes and rotation parameters) 3.) Brozovic, M. et al. (2010) DPS 42, 5702. (abstract) (Radar Images And Shape Model Of A Triple Asteroid (136617) 1994CC) 4.) Brozovic, M. et al. (2011) Icarus 216, 241-256. (Radar and optical observations and physical modeling of triple near-Earth Asteroid (136617) 1994 CC)
[7]	EARN	Earth Asteroids Research Node: https://earn.dlr.de

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

13885

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.522995

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1988-09-14.12847

Unit

Source

[2]

Last Observation

Value

2026-09-20.494699

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

721 (5)

Unit

Source

[1]

Radar Summary

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

Radar

Value

Unit

Source

First Observation

Value

2009-06-12

Unit

Source

[3]

Last Observation

Value

2009-06-19

Unit

Source

[3]

Delay (Discarded)

Value

13 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

14 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

27 (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

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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 136617 1994CC 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	1965-07-18 12:38	< 1 min	0.0713323	0.0713321	0.0000001
EARTH	1988-08-29 12:47	< 1 min	0.0958456	0.0958445	0.0000004
EARTH	2009-06-10 06:22	< 1 s	0.0168371	0.0168371	0.0000000
EARTH	2032-09-01 09:36	< 1 min	0.1106820	0.1106806	0.0000005
EARTH	2053-07-27 15:47	< 1 min	0.0729075	0.0729075	0.0000000
EARTH	2074-06-11 17:36	< 1 min	0.0170197	0.0170190	0.0000002
EARTH	2095-06-19 00:31	4.0	0.0334638	0.0334440	0.0000066
EARTH	2116-08-21 11:04	5.8	0.0721166	0.0721061	0.0000035

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
337.28129612	155.35177450	0.01551797	MINIMUM
18.21584246	219.06153603	0.06915005	MINIMUM
6.57986047	200.99160901	0.07210630	SADDLE
180.08316786	10.40249972	1.33864239	SADDLE
359.79712589	10.27016356	1.93746986	SADDLE
179.75116305	190.18936947	3.33549769	MAXIMUM

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MOID Plots

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