Asteroids

2012TN20

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

Orbital Properties

Epoch

59400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.726

Aphelion (Q)

1.638

Eccentricity (e)

0.386

Inclination (i)

11.6

deg

Orbit period (P)

469.4

days

Earth MOID

0.13741

Next Earth close approach

Date

2021-10-27

Nominal distance (from Earth center)

0.15361

22980164

Maximum Brightness

120.7

Orbit Visualiser

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Risk

Object is not in risk list

Object is in priority list

Physical Properties

Absolute Magnitude (H)

22.3

Diameter

120*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2012-10-07

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

1.18

1-sigma variation

0.0011828

Unit

Eccentricity (e)

Value

0.385660560642415

1-sigma variation

9.92852E-4

Unit

Inclination (i)

Value

11.61

1-sigma variation

4.120E-2

Unit

Ascending Node (Ω)

Value

348.81

1-sigma variation

3.563E-2

Unit

Arg. of Perihelion (ω)

Value

138.98

1-sigma variation

2.892E-2

Unit

Mean Anomaly (M)

Value

221.18

1-sigma variation

3.42136

Unit

Perihelion

Value

7.262E-1

1-sigma variation

Unit

Aphelion

Value

1.64

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

4.121E-1

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-2.139E-1

1-sigma variation

Unit

MOID

Value

1.374E-1

1-sigma variation

Unit

Orbit Period

Value

469.45

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.39902E-6	1.17434E-6	4.87117E-5	4.20568E-5	-3.41513E-5	-4.04679E-3
e	1.17434E-6	9.85755E-7	4.08862E-5	3.52975E-5	-2.86613E-5	-3.39687E-3
i	4.87117E-5	4.08862E-5	1.69747E-3	1.46701E-3	-1.19099E-3	-1.40904E-1
Ω	4.20568E-5	3.52975E-5	1.46701E-3	1.26933E-3	-1.03031E-3	-1.21655E-1
ω	-3.41513E-5	-2.86613E-5	-1.19099E-3	-1.03031E-3	8.36512E-4	9.87870E-2
M	-4.04679E-3	-3.39687E-3	-1.40904E-1	-1.21655E-1	9.87870E-2	1.17057E1

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

22.287

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[2]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

Unit

Source

[-]

Diameter

Value

120*

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

Unit

Source

[-]

Sources

No.	Name	Additional
[1]	ESA ODIM	ESA orbit determination and impact monitoring system
[2]	NEODyS	NEO Dynamic Site: https://newton.spacedys.com/neodys2
[3]	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

3258

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

0.348828

Unit

arcseconds

Source

[1]

First Observation

Value

2012-10-07.400541

Unit

Source

[2]

Last Observation

Value

2012-10-17.26283

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

25 (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 2012TN20 from 1950 to 2150

Body	Date	MJD	Nominal distance (au)	Min possible distance (au)	Stretching (au)	Width (au)	Close approach probability
VENUS	1964-04-01.20888	38486.2	0.0474617	0.0233756	7.465E-2	5.731E-6	2.10E-1
EARTH	2000-04-23.61355	51657.6	0.1578751	0.1369213	9.791E-2	7.761E-6	4.87E-1
EARTH	2003-10-27.42953	52939.4	0.1880506	0.1495016	6.930E-2	9.334E-6	5.46E-1
EARTH	2009-04-17.45669	54938.5	0.1378139	0.1371629	3.521E-2	6.999E-6	1.00E0
EARTH	2012-10-27.20119	56227.2	0.1618093	0.1603842	4.731E-4	4.701E-7	1.00E0
EARTH	2018-04-14.36830	58222.4	0.1378705	0.1370458	4.327E-2	6.373E-6	1.00E0
EARTH	2021-10-27.11024	59514.1	0.1536129	0.1499528	8.218E-2	1.041E-5	5.37E-1
VENUS	2023-04-26.52535	60060.5	0.0278706	0.0230337	9.905E-2	7.094E-6	1.51E-1
EARTH	2027-04-07.96393	61503.0	0.1491370	0.1376825	2.033E-1	5.352E-6	2.32E-1
EARTH	2030-10-25.23501	62799.2	0.1566413	0.1502039	3.381E-1	1.083E-5	1.30E-1
EARTH	2036-03-23.30878	64775.3	0.1851197	0.1378303	4.435E-1	4.863E-6	8.95E-2
VENUS	2068-03-22.32357	76462.3	0.0341133	0.0221618	3.449E-1	6.660E-6	4.43E-2
EARTH	2077-04-23.77041	79781.8	0.1560171	0.1471070	1.683E-2	1.701E-5	1.00E0
EARTH	2080-10-27.46525	81064.5	0.1610404	0.1511919	1.661E-1	1.104E-5	2.60E-1
EARTH	2086-03-29.31616	83043.3	0.1730216	0.1394041	2.937E-1	4.524E-6	1.47E-1
EARTH	2109-04-29.57076	91474.6	0.1883438	0.1397463	5.982E-1	8.421E-6	7.63E-2
EARTH	2112-10-28.65311	92752.7	0.1794620	0.1517776	5.832E-1	9.853E-6	7.36E-2
VENUS	2115-08-13.15873	93771.2	0.0465247	0.0218328	6.305E-1	8.574E-6	2.46E-2
EARTH	2118-04-07.23883	94739.2	0.1549138	0.1398343	3.395E-1	5.115E-6	1.36E-1
EARTH	2121-10-24.83755	96035.8	0.1792238	0.1520977	6.580E-2	8.837E-6	5.79E-1
VENUS	2130-12-29.58994	99388.6	0.0461725	0.0218671	7.317E-1	8.509E-6	2.12E-2

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