Asteroids

2011CZ3 help

Last update: 2026-03-17 23:26 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.781

Aphelion (Q)

2.414

Eccentricity (e)

0.511

Inclination (i)

2.1

deg

Orbit period (P)

737.6

Earth MOID

0.00315

U parameter

9.0

Next Earth close approach

Date

2027-07-10

Nominal distance (from Earth center)

0.12536

18753060

Maximum Brightness

24.7

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.3

mag

Diameter

15 - 30*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2011-02-05

Observatory

Catalina Sky Survey

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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.597638

1-sigma variation

0.010124

Unit

Eccentricity (e)

Value

0.511091

1-sigma variation

0.002241

Unit

Inclination (i)

Value

2.1289

1-sigma variation

0.0197

Unit

Long. of Ascending Node (Ω)

Value

325.4173

1-sigma variation

0.7057

Unit

Arg. of Perihelion (ω)

Value

242.4699

1-sigma variation

0.2946

Unit

Mean Anomaly (M)

Value

191.13486

1-sigma variation

5.32348

Unit

Perihelion distance

Value

0.781100

1-sigma variation

Unit

Aphelion distance

Value

2.414176

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.532701

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.032691

1-sigma variation

Unit

MOID

Value

0.003145

1-sigma variation

Unit

Orbit Period

Value

737.5916

1-sigma variation

Unit

U parameter

Value

9.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.02490E-4	2.26854E-5	-1.99509E-4	7.14392E-3	-2.98258E-3	-5.38936E-2
e	2.26854E-5	5.02124E-6	-4.41598E-5	1.58125E-3	-6.60170E-4	-1.19289E-2
i	-1.99509E-4	-4.41598E-5	3.88369E-4	-1.39065E-2	5.80594E-3	1.04910E-1
Ω	7.14392E-3	1.58125E-3	-1.39065E-2	4.97955E-1	-2.07896E-1	-3.75656E0
ω	-2.98258E-3	-6.60170E-4	5.80594E-3	-2.07896E-1	8.67963E-2	1.56836E0
M	-5.38936E-2	-1.19289E-2	1.04910E-1	-3.75656E0	1.56836E0	2.83394E1

Date of computation: 2026-03-17 23:26 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

26.292

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

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 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

Unit

Source

[1]

Unobserved

Value

5547

Unit

Source

[1]

Normalized RMS of residuals

Value

0.521273

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2011-02-05.21914

Unit

Source

[2]

Last Observation

Value

2011-02-09.99111

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

30 (0)

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

[-]

Last Observation

Value

Unit

Source

[-]

Delay (Discarded)

Value

0 (0)

Unit

Source

[-]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[-]

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

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

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 2011CZ3 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
MARS	1994-10-16 02:53	> 1 w	0.0433400	0.0152779	0.4720912
EARTH	2007-02-02 13:23	> 1 d	0.1044266	0.0043974	0.0923296
EARTH	2009-02-08 13:53	> 1 d	0.0098025	0.0037596	0.0203276
EARTH	2011-02-10 01:17	< 1 min	0.0064324	0.0064079	0.0000082
EARTH	2013-02-22 18:03	> 1 d	0.1091811	0.0514803	0.0192699
EARTH	2015-03-18 15:58	> 1 w	0.1853680	0.1239031	0.0205761
EARTH	2021-05-24 19:29	> 1 w	0.1887192	0.0623107	0.0434615
EARTH	2023-06-19 06:18	> 1 w	0.1112633	0.0266156	0.0926502
EARTH	2025-07-01 21:53	> 1 w	0.0273421	0.0271429	0.0137935
EARTH	2027-07-10 16:26	> 1 w	0.1253565	0.0268337	0.2298684
EARTH	2100-02-01 13:18	> 1 mo	0.1420955	0.0031247	1.0671932
EARTH	2102-02-11 11:55	> 1 mo	0.0018997	0.0018994	0.0105582
EARTH	2104-02-27 09:36	> 1 mo	0.1189800	0.0059785	156.2379072
EARTH	2106-03-26 20:27	> 1 mo	0.1999437	0.0345578	133.6573218
EARTH	2112-06-10 12:10	> 1 mo	0.1506738	0.0288165	582.9930616
EARTH	2114-06-30 08:10	> 1 mo	0.0482164	0.0299703	708.9821383
EARTH	2116-07-08 16:14	> 1 mo	0.0798093	0.0298835	935.6880920
EARTH	2118-07-16 17:10	> 1 mo	0.1990316	0.0291051	960.7534529

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
318.42126540	38.53430795	0.00321252	MINIMUM
44.90484977	178.57357319	0.02709779	MINIMUM
2.25627101	109.33681159	0.22671433	SADDLE
180.69371751	287.35952726	1.41947519	SADDLE
2.03669215	288.96159507	1.77649735	SADDLE
180.64733527	107.33722125	3.41959828	MAXIMUM

Download:

MOID Plots

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