Asteroids

2021JT

Last update: 2021-05-06 00:33 UTC

Orbital Properties

Epoch

59400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.916

Aphelion (Q)

1.744

Eccentricity (e)

0.311

Inclination (i)

2.3

deg

Orbit period (P)

560.1

days

Earth MOID

0.00025

Next Earth close approach

Date

2021-05-10

Nominal distance (from Earth center)

0.01501

2245643

Maximum Brightness

120.8

Orbit Visualiser

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Risk

Object is not in risk list

Object is in priority list

Physical Properties

Absolute Magnitude (H)

27.4

Diameter

12*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2021-05-03

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

1.33

1-sigma variation

6.76012E-4

Unit

Eccentricity (e)

Value

0.311381899494479

1-sigma variation

4.13285E-4

Unit

Inclination (i)

Value

2.25

1-sigma variation

2.272E-3

Unit

Ascending Node (Ω)

Value

51.42

1-sigma variation

1.910E-3

Unit

Arg. of Perihelion (ω)

Value

232.99

1-sigma variation

8.315E-3

Unit

Mean Anomaly (M)

Value

6.84

1-sigma variation

3.691E-3

Unit

Perihelion

Value

9.157E-1

1-sigma variation

Unit

Aphelion

Value

1.74

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

4.865E-1

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

1.454E-3

1-sigma variation

Unit

MOID

Value

2.529E-4

1-sigma variation

Unit

Orbit Period

Value

560.06

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.56992E-7	2.78921E-7	1.52003E-6	8.83831E-7	-2.38560E-6	2.01933E-6
e	2.78921E-7	1.70804E-7	9.35238E-7	5.07349E-7	-1.27690E-6	1.18088E-6
i	1.52003E-6	9.35238E-7	5.16352E-6	2.48450E-6	-5.53503E-6	6.03409E-6
Ω	8.83831E-7	5.07349E-7	2.48450E-6	3.64932E-6	-1.48607E-5	6.81794E-6
ω	-2.38560E-6	-1.27690E-6	-5.53503E-6	-1.48607E-5	6.91352E-5	-2.68388E-5
M	2.01933E-6	1.18088E-6	6.03409E-6	6.81794E-6	-2.68388E-5	1.36226E-5

Date of computation: 2021-05-04 06:00 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

27.357

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

12*

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

0.581811

Unit

arcseconds

Source

[1]

First Observation

Value

2021-05-01.40612

Unit

Source

[2]

Last Observation

Value

2021-05-04.11489

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

18 (1)

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 2021JT from 1950 to 2150

Body	Date	MJD	Nominal distance (au)	Min possible distance (au)	Stretching (au)	Width (au)	Close approach probability
EARTH	1950-08-22.26349	33515.3	0.0519150	0.0385179	2.511E-1	3.905E-6	2.61E-1
EARTH	1967-06-18.53430	39659.5	0.0951729	0.0004618	6.057E-2	1.020E-5	7.95E-1
EARTH	1984-05-04.10647	45824.1	0.0706830	0.0004346	8.421E-2	7.673E-7	7.56E-1
EARTH	1987-09-04.05697	47042.1	0.0579582	0.0384473	1.017E-1	2.839E-6	6.44E-1
MARS	1993-03-07.67827	49053.7	0.0397473	0.0111394	6.658E-2	9.854E-6	2.44E-1
EARTH	2004-07-01.75933	53187.8	0.1033178	0.0816806	1.129E-2	2.703E-5	1.00E0
EARTH	2021-05-10.46703	59344.5	0.0150112	0.0149581	1.786E-5	2.078E-7	1.00E0
EARTH	2024-09-01.06710	60554.1	0.0398876	0.0382013	1.351E-2	3.059E-6	1.00E0
MARS	2043-12-17.71227	67600.7	0.0170138	0.0115752	1.039E-1	1.050E-5	1.56E-1
EARTH	2044-06-24.37887	67790.4	0.1015276	0.0009457	3.914E-2	1.491E-5	9.42E-1
EARTH	2064-05-09.57044	75049.6	0.0240313	0.0012637	8.599E-2	2.887E-6	7.76E-1
EARTH	2067-08-26.81043	76253.8	0.0486488	0.0378488	1.768E-1	4.848E-6	3.70E-1
MARS	2085-04-30.40367	82710.4	0.0230664	0.0117629	1.258E0	1.020E-5	1.29E-2
EARTH	2090-05-12.56273	84548.6	0.0044651	0.0017750	1.958E0	2.541E-6	3.41E-2
EARTH	2093-05-14.12971	85646.1	0.0088555	0.0017817	1.016E2	2.489E-6	6.56E-4
EARTH	2096-07-02.40806	86791.4	0.1078734	0.0016627	2.233E2	2.162E-5	2.74E-4
EARTH	2099-08-28.07038	87943.1	0.0483839	0.0352356	2.891E3	7.448E-6	2.27E-5
EARTH	2102-09-15.41924	89056.4	0.1338631	0.0352295	5.032E3	7.641E-6	1.30E-5
MARS	2139-11-12.43234	102628.4	0.0275088	0.0084846	1.051E4	1.596E-5	1.56E-6
EARTH	2143-05-05.91534	103898.9	0.0876243	0.0024164	1.539E4	3.815E-6	4.33E-6
EARTH	2146-05-29.21417	105018.2	0.0624490	0.0024730	7.563E3	1.526E-5	8.82E-6
EARTH	2149-07-25.37219	106171.4	0.1033743	0.0024187	2.065E2	2.413E-5	2.96E-4

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