Asteroids

2021NC6

Last update: 2021-09-17 23:50 UTC

Orbital Properties

Epoch

59400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.882

Aphelion (Q)

1.997

Eccentricity (e)

0.387

Inclination (i)

1.9

deg

Orbit period (P)

631.1

days

Earth MOID

0.01555

Next Earth close approach

Date

2040-09-14

Nominal distance (from Earth center)

0.11881

17774186

Maximum Brightness

32.1

Orbit Visualiser

Click the button to start Orbit Visualiser

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

23.4

Diameter

70*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2021-07-13

Observatory

Pan-STARRS 1, Haleakala

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion
Aphelion
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period

Value

1-sigma variation

Unit

Epoch

Value

59400.0

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.44

1-sigma variation

0.00123561

Unit

Eccentricity (e)

Value

0.387283028609959

1-sigma variation

6.55698E-4

Unit

Inclination (i)

Value

1.88

1-sigma variation

2.934E-3

Unit

Ascending Node (Ω)

Value

208.65

1-sigma variation

1.943E-2

Unit

Arg. of Perihelion (ω)

Value

156.77

1-sigma variation

2.002E-2

Unit

Mean Anomaly (M)

Value

316.23

1-sigma variation

6.324E-2

Unit

Perihelion

Value

8.822E-1

1-sigma variation

Unit

Aphelion

Value

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

8.950E-1

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-9.325E-2

1-sigma variation

Unit

MOID

Value

1.555E-2

1-sigma variation

Unit

Orbit Period

Value

631.07

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.52672E-6	8.10163E-7	3.62425E-6	2.37059E-5	-2.46212E-5	7.81430E-5
e	8.10163E-7	4.29939E-7	1.92352E-6	1.25935E-5	-1.30737E-5	4.14650E-5
i	3.62425E-6	1.92352E-6	8.60757E-6	5.64667E-5	-5.85655E-5	1.85474E-4
Ω	2.37059E-5	1.25935E-5	5.64667E-5	3.77463E-4	-3.88221E-4	1.21207E-3
ω	-2.46212E-5	-1.30737E-5	-5.85655E-5	-3.88221E-4	4.00885E-4	-1.25942E-3
M	7.81430E-5	4.14650E-5	1.85474E-4	1.21207E-3	-1.25942E-3	3.99982E-3

Date of computation: 2021-08-24 04:39 UTC

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)

Taxononomy

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

23.428

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

Unit

Source

[-]

Diameter

Value

70*

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

[-]

Sources

No.	Name	Additional
[1]	ESA ODIM	ESA orbit determination and impact monitoring system
[2]	Estimation	Estimated from absolute magnitude

**Estimated value

Observational Information

Arc Length
Unobserved

Arc Information

Value

Unit

Source

Arc Length

Value

Unit

days

Source

[1]

Unobserved

Value

Unit

days

Source

[1]

Astrometry Summary

RMS of Residuals
First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

RMS of Residuals

Value

0.409341

Unit

arcseconds

Source

[1]

First Observation

Value

2021-07-13.28919

Unit

Source

[2]

Last Observation

Value

2021-08-05.2005

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

27 (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

[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 2021NC6 from 1950 to 2150

Body	Date	MJD	Nominal distance (au)	Min possible distance (au)	Stretching (au)	Width (au)	Close approach probability
MARS	1950-07-30.83365	33492.8	0.0423978	0.0421763	4.825E-2	8.935E-7	1.85E-1
EARTH	1952-07-14.49459	34207.5	0.1904760	0.0327550	5.202E-2	1.260E-6	5.31E-1
EARTH	1964-10-13.99937	38682.0	0.1094089	0.0904260	6.302E-3	2.340E-6	1.00E0
EARTH	1983-09-02.76799	45579.8	0.1082413	0.0151945	4.507E-2	2.857E-6	8.63E-1
EARTH	2002-08-11.59337	52497.6	0.0661773	0.0327970	1.078E-1	1.659E-6	6.09E-1
EARTH	2014-12-05.04894	56996.0	0.1957762	0.0153724	5.767E-2	4.049E-7	5.12E-1
EARTH	2021-08-17.82070	59443.8	0.0821397	0.0817326	1.354E-4	2.212E-7	1.00E0
EARTH	2040-09-14.77269	66411.8	0.1188131	0.0157569	3.035E-2	4.755E-6	1.00E0
EARTH	2059-10-17.15524	73383.2	0.1067984	0.0156724	7.914E-2	2.115E-6	7.04E-1
EARTH	2078-11-07.90412	80344.9	0.0625256	0.0158539	1.111E-1	8.631E-7	5.98E-1
EARTH	2085-07-15.54912	82786.5	0.1931508	0.0777459	2.737E-2	1.476E-6	5.42E-1
EARTH	2097-10-23.64713	87269.6	0.0970944	0.0158239	9.494E-2	1.582E-6	6.85E-1
EARTH	2116-09-19.85527	94174.9	0.1203481	0.0160991	7.356E-2	5.721E-6	7.52E-1
EARTH	2135-08-25.19625	101088.2	0.0927574	0.0330270	2.571E-1	2.146E-6	2.54E-1
EARTH	2147-12-07.59935	105575.6	0.1997490	0.0163453	2.288E-1	4.015E-7	2.90E-1

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