Asteroids

2016CZ31 help

Last update: 2025-09-10 00:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.736

Aphelion (Q)

2.141

Eccentricity (e)

0.488

Inclination (i)

14.6

deg

Orbit period (P)

630.3

Earth MOID

0.01831

U parameter

2.4

Next Earth close approach

Date

2028-01-15

Nominal distance (from Earth center)

0.1819

27211265

Maximum Brightness

21.2

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

22.2

mag

Diameter

100 - 220*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2016-02-05

Observatory

Pan-STARRS 1, Haleakala

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.438651

1-sigma variation

3.132E-7

Unit

Eccentricity (e)

Value

0.488120

1-sigma variation

0.000001

Unit

Inclination (i)

Value

14.5783

1-sigma variation

2.652E-5

Unit

Long. of Ascending Node (Ω)

Value

309.5235

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

76.0708

1-sigma variation

0.0002

Unit

Mean Anomaly (M)

Value

301.23273

1-sigma variation

0.00019

Unit

Perihelion distance

Value

0.736416

1-sigma variation

Unit

Aphelion distance

Value

2.140886

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.035450

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.256352

1-sigma variation

Unit

MOID

Value

0.018306

1-sigma variation

Unit

Orbit Period

Value

630.2772

1-sigma variation

Unit

U parameter

Value

2.4

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	9.81152E-14	-3.87811E-13	5.35794E-12	-1.82203E-11	-6.02674E-11	-5.86528E-11
e	-3.87811E-13	1.53416E-12	-2.11791E-11	7.17803E-11	2.38533E-10	2.31873E-10
i	5.35794E-12	-2.11791E-11	7.03095E-10	-9.10752E-10	-3.22265E-9	-3.31305E-9
Ω	-1.82203E-11	7.17803E-11	-9.10752E-10	3.72551E-9	1.09845E-8	1.07724E-8
ω	-6.02674E-11	2.38533E-10	-3.22265E-9	1.09845E-8	3.72450E-8	3.60462E-8
M	-5.86528E-11	2.31873E-10	-3.31305E-9	1.07724E-8	3.60462E-8	3.51378E-8

Date of computation: 2025-09-10 00:30 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

22.205

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

100 - 220*

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

2365

Unit

Source

[1]

Unobserved

Value

1152

Unit

Source

[1]

Normalized RMS of residuals

Value

0.490154

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2016-02-05.44458

Unit

Source

[2]

Last Observation

Value

2022-07-28.411206

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

71 (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

Close Approaches for 2016CZ31 from 1950 to 2125

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1953-08-01 07:57	6.0	0.0492476	0.0490970	0.0000502
EARTH	1959-01-16 03:57	3.5	0.1997756	0.1996439	0.0000439
EARTH	1972-07-20 23:03	4.6	0.1342188	0.1340412	0.0000592
EARTH	1978-01-08 11:36	3.5	0.1053706	0.1053548	0.0000053
EARTH	2003-08-13 04:47	5.9	0.1586435	0.1585430	0.0000335
EARTH	2022-07-29 23:01	< 1 min	0.0187037	0.0187029	0.0000003
EARTH	2028-01-15 20:44	< 1 min	0.1818961	0.1818493	0.0000156
EARTH	2041-07-22 08:13	3.0	0.1188871	0.1187716	0.0000385
EARTH	2047-01-09 21:54	2.8	0.1031661	0.1031418	0.0000081
EARTH	2066-01-04 14:20	5.7	0.1485564	0.1483305	0.0000753
EARTH	2091-08-08 10:40	12.8	0.1175107	0.1172322	0.0000929
EARTH	2110-07-30 19:53	3.0	0.0144590	0.0144419	0.0000058
EARTH	2116-01-15 22:43	14.1	0.1529774	0.1523684	0.0002033

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
308.02958072	204.39633349	0.01755659	MINIMUM
54.14040891	6.04752392	0.10364860	MINIMUM
2.29754864	288.19316751	0.33519820	SADDLE
180.59203818	102.83444020	1.19337243	SADDLE
358.74190991	101.99707436	1.72687539	SADDLE
178.69672477	281.69167811	3.11667636	MAXIMUM

Download:

MOID Plots

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