Asteroids

2021KH2

Last update: 2021-11-30 01:34 UTC

Orbital Properties

Epoch

59600.0

MJD

Orbit type

Apollo

Perihelion (q)

1.007

Aphelion (Q)

1.048

Eccentricity (e)

0.02

Inclination (i)

12.3

deg

Orbit period (P)

380.4

days

Earth MOID

0.00618

Next Earth close approach

Date

2045-05-16

Nominal distance (from Earth center)

0.17618

26356741

Maximum Brightness

124.5

Orbit Visualiser

Click the button to start Orbit Visualiser

Risk

Object is not in risk list

Object is in priority list

Physical Properties

Absolute Magnitude (H)

25.3

Diameter

30*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2021-05-21

Observatory

ATLAS-MLO, Mauna Loa

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

59600.0

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.03

1-sigma variation

3.03465E-7

Unit

Eccentricity (e)

Value

0.020230416402764

1-sigma variation

3.91099E-7

Unit

Inclination (i)

Value

12.29

1-sigma variation

1.215E-4

Unit

Ascending Node (Ω)

Value

240.92

1-sigma variation

3.680E-6

Unit

Arg. of Perihelion (ω)

Value

62.55

1-sigma variation

2.072E-4

Unit

Mean Anomaly (M)

Value

170.29

1-sigma variation

1.359E-4

Unit

Perihelion

Value

1.01

1-sigma variation

Unit

Aphelion

Value

1.05

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

6.239E-3

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

4.979E-2

1-sigma variation

Unit

MOID

Value

6.180E-3

1-sigma variation

Unit

Orbit Period

Value

380.44

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	9.20908E-14	1.18377E-13	3.53360E-11	5.00496E-13	-6.09280E-11	3.85466E-11
e	1.18377E-13	1.52959E-13	4.54356E-11	6.48130E-13	-7.73612E-11	4.86720E-11
i	3.53360E-11	4.54356E-11	1.47706E-8	1.92910E-10	-2.22608E-8	1.36663E-8
Ω	5.00496E-13	6.48130E-13	1.92910E-10	1.35389E-11	-3.76982E-10	2.45014E-10
ω	-6.09280E-11	-7.73612E-11	-2.22608E-8	-3.76982E-10	4.29142E-8	-2.79608E-8
M	3.85466E-11	4.86720E-11	1.36663E-8	2.45014E-10	-2.79608E-8	1.84661E-8

Date of computation: 2021-11-10 09:40 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)

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

25.307

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

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 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

170

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

0.594917

Unit

arcseconds

Source

[1]

First Observation

Value

2021-05-21.30833

Unit

Source

[2]

Last Observation

Value

2021-11-08.252702

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

80 (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 2021KH2 from 1950 to 2121

Body	Date	MJD	Nominal distance (au)	Min possible distance (au)	Stretching (au)	Width (au)	Close approach probability
EARTH	1965-05-22.56107	38902.6	0.0059302	0.0054186	3.848E-3	8.067E-9	1.00E0
EARTH	1965-11-21.05896	39085.1	0.0509164	0.0478621	3.514E-3	1.638E-8	1.00E0
EARTH	1990-05-22.61525	48033.6	0.0085615	0.0082789	1.183E-4	1.019E-8	1.00E0
EARTH	1990-11-23.15106	48218.2	0.0397945	0.0396929	1.038E-4	7.625E-9	1.00E0
EARTH	1991-05-28.97311	48405.0	0.1918486	0.1915453	1.026E-4	2.759E-8	1.00E0
EARTH	1991-11-16.16315	48576.2	0.1858349	0.1855405	1.048E-4	9.680E-8	1.00E0
EARTH	2020-05-16.25633	58985.3	0.1971931	0.1971818	3.820E-6	4.236E-8	1.00E0
EARTH	2020-12-05.25350	59188.3	0.1971640	0.1971548	3.096E-6	1.103E-7	1.00E0
EARTH	2021-05-22.51129	59356.5	0.0062899	0.0062897	5.750E-8	4.416E-9	1.00E0
EARTH	2021-11-21.01738	59539.0	0.0494205	0.0494189	5.588E-7	1.125E-7	1.00E0
EARTH	2045-05-16.60804	68116.6	0.1761839	0.1760020	6.247E-5	4.320E-8	1.00E0
EARTH	2045-12-05.46623	68319.5	0.1628637	0.1627096	6.093E-5	9.892E-8	1.00E0
EARTH	2046-05-25.26008	68490.3	0.0796346	0.0794521	6.268E-5	1.623E-8	1.00E0
EARTH	2046-11-16.60176	68665.6	0.0973208	0.0971809	5.931E-5	4.665E-8	1.00E0
EARTH	2069-12-08.92501	77088.9	0.1859468	0.1856767	1.064E-4	1.363E-7	1.00E0
EARTH	2070-05-24.38679	77255.4	0.0571015	0.0567873	1.080E-4	1.585E-8	1.00E0
EARTH	2070-11-17.25675	77432.3	0.0839832	0.0837610	1.045E-4	3.319E-8	1.00E0
EARTH	2093-05-22.60672	85654.6	0.0148202	0.0141778	2.396E-4	1.330E-8	1.00E0
EARTH	2093-11-17.96232	85834.0	0.0689890	0.0688857	1.960E-4	5.245E-8	1.00E0
EARTH	2113-05-17.03262	92953.0	0.1948247	0.1761223	6.113E-3	4.293E-8	6.45E-1
EARTH	2113-12-07.61812	93157.6	0.1580104	0.1428825	6.012E-3	9.077E-8	1.00E0
EARTH	2114-05-27.12964	93328.1	0.1155537	0.0956659	6.246E-3	2.566E-8	1.00E0
EARTH	2114-11-12.49354	93497.5	0.1466973	0.1306527	6.077E-3	1.165E-7	1.00E0

Download as: