Asteroids

2021RY5

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

Orbital Properties

Epoch

59400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.902

Aphelion (Q)

2.17

Eccentricity (e)

0.413

Inclination (i)

deg

Orbit period (P)

695.4

days

Earth MOID

0.00493

Next Earth close approach

Date

2038-09-09

Nominal distance (from Earth center)

0.09475

14174162

Maximum Brightness

23.2

Orbit Visualiser

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Risk

Object is not in risk list

Object is in priority list

Physical Properties

Absolute Magnitude (H)

25.7

Diameter

26*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2021-09-08

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

1.54

1-sigma variation

7.70676E-4

Unit

Eccentricity (e)

Value

0.412762073681061

1-sigma variation

3.29405E-4

Unit

Inclination (i)

Value

4.03

1-sigma variation

2.547E-3

Unit

Ascending Node (Ω)

Value

2.719E-1

1-sigma variation

8.994E-4

Unit

Arg. of Perihelion (ω)

Value

45.35

1-sigma variation

1.764E-3

Unit

Mean Anomaly (M)

Value

300.62

1-sigma variation

4.847E-2

Unit

Perihelion

Value

9.021E-1

1-sigma variation

Unit

Aphelion

Value

2.17

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-1.614E-2

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

7.984E-1

1-sigma variation

Unit

MOID

Value

4.928E-3

1-sigma variation

Unit

Orbit Period

Value

695.39

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	5.93941E-7	2.53863E-7	1.96259E-6	6.56216E-7	-1.31112E-6	3.73567E-5
e	2.53863E-7	1.08508E-7	8.38892E-7	2.80212E-7	-5.59955E-7	1.59670E-5
i	1.96259E-6	8.38892E-7	6.48675E-6	2.15687E-6	-4.31411E-6	1.23439E-4
Ω	6.56216E-7	2.80212E-7	2.15687E-6	8.08936E-7	-1.58157E-6	4.12803E-5
ω	-1.31112E-6	-5.59955E-7	-4.31411E-6	-1.58157E-6	3.10998E-6	-8.24763E-5
M	3.73567E-5	1.59670E-5	1.23439E-4	4.12803E-5	-8.24763E-5	2.34960E-3

Date of computation: 2021-09-14 11:58 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

25.668

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

26*

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

0.752413

Unit

arcseconds

Source

[1]

First Observation

Value

2021-08-29.430801

Unit

Source

[2]

Last Observation

Value

2021-09-12.53578

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 2021RY5 from 1950 to 2150

Body	Date	MJD	Nominal distance (au)	Min possible distance (au)	Stretching (au)	Width (au)	Close approach probability
EARTH	1962-10-06.84320	37943.8	0.0662289	0.0060257	1.394E-1	1.472E-7	4.77E-1
MARS	1968-12-14.11219	40204.1	0.0289881	0.0235333	1.539E-1	6.378E-7	9.56E-2
EARTH	1981-11-24.11382	44932.1	0.0961783	0.0693178	8.307E-2	1.312E-6	7.28E-1
EARTH	2000-12-26.59034	51904.6	0.0798786	0.0692158	9.331E-2	6.442E-7	6.70E-1
EARTH	2021-09-18.41816	59475.4	0.0089574	0.0089372	6.723E-6	4.324E-8	1.00E0
EARTH	2038-09-09.37269	65675.4	0.0947484	0.0044487	7.769E-2	1.356E-7	7.26E-1
EARTH	2054-01-02.43592	71269.4	0.1152944	0.0703425	5.650E-2	6.080E-7	7.83E-1
EARTH	2070-12-18.49657	77463.5	0.0734065	0.0714018	2.094E-3	7.093E-7	1.00E0
EARTH	2087-11-13.85825	83637.9	0.1027811	0.0971431	1.844E-2	1.671E-6	1.00E0
EARTH	2104-10-09.56618	89811.6	0.0694434	0.0031854	6.428E-2	1.548E-7	8.41E-1
EARTH	2121-09-28.30519	96009.3	0.0351090	0.0028637	1.572E-2	8.944E-8	1.00E0
EARTH	2138-11-10.03121	102261.0	0.1021098	0.0714260	4.394E-2	1.631E-6	1.00E0

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