Asteroids

2023RR9

Last update: 2023-10-02 13:05 UTC

Orbital Properties

Epoch

60200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.981

Aphelion (Q)

2.388

Eccentricity (e)

0.417

Inclination (i)

3.2

deg

Orbit period (P)

798.6

Earth MOID

0.01996

U parameter

7.8

Next Earth close approach

Date

2047-09-26

Nominal distance (from Earth center)

0.19386

29001656

Maximum Brightness

25.1

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

26.1

mag

Diameter

22*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2023-09-13

Observatory

Pan-STARRS 2, Haleakala

Orbit Visualiser

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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
U parameter

Value

1-sigma variation

Unit

Epoch

Value

60200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.684633

1-sigma variation

0.001645

Unit

Eccentricity (e)

Value

0.417404

1-sigma variation

0.000595

Unit

Inclination (i)

Value

3.2176

1-sigma variation

0.0038

Unit

Ascending Node (Ω)

Value

180.2835

1-sigma variation

0.0037

Unit

Arg. of Perihelion (ω)

Value

133.0985

1-sigma variation

0.0101

Unit

Mean Anomaly (M)

Value

14.53209

1-sigma variation

0.02211

Unit

Perihelion

Value

0.981460

1-sigma variation

Unit

Aphelion

Value

2.387805

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.948510

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.078951

1-sigma variation

Unit

MOID

Value

0.019958

1-sigma variation

Unit

Orbit Period

Value

798.6497

1-sigma variation

Unit

U parameter

Value

7.8

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.70539E-6	9.77674E-7	4.92084E-6	4.09641E-6	-1.22309E-5	-3.63359E-5
e	9.77674E-7	3.53602E-7	1.73862E-6	1.52689E-6	-4.53520E-6	-1.31171E-5
i	4.92084E-6	1.73862E-6	1.43975E-5	1.04822E-6	-6.49917E-6	-6.79886E-5
Ω	4.09641E-6	1.52689E-6	1.04822E-6	1.37594E-5	-3.70498E-5	-5.27878E-5
ω	-1.22309E-5	-4.53520E-6	-6.49917E-6	-3.70498E-5	1.01119E-4	1.58691E-4
M	-3.63359E-5	-1.31171E-5	-6.79886E-5	-5.27878E-5	1.58691E-4	4.88718E-4

Date of computation: 2023-09-15 12:02 UTC

Note: The ASCII file is in a format suitable for Orbfit input.

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

26.057

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

22*

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

[-]

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Sources

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

Observational Information

Arc Length
Unobserved

Arc Information

Value

Unit

Source

Arc Length

Value

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Astrometry Summary

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

Optical

Value

Unit

Source

RMS of Residuals

Value

0.331132

Unit

arcsec

Source

[1]

First Observation

Value

2023-09-13.404222

Unit

Source

[2]

Last Observation

Value

2023-09-15.287034

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

23 (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 2023RR9 from 1950 to 2123

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possibile distance in au	Distance uncert. in au
EARTH	1964-09-19 06:59	> 1 w	0.1196773	0.0159355	0.2510779
EARTH	1975-06-24 11:30	> 1 w	0.0855724	0.0559041	0.1124952
EARTH	1999-08-22 08:35	> 1 mo	0.0376309	0.0158841	0.0908709
EARTH	2023-09-04 04:45	5.5	0.0199680	0.0198904	0.0000258
EARTH	2047-09-26 15:59	> 1 w	0.1938641	0.0114265	0.2007600
EARTH	2058-06-28 14:12	> 1 mo	0.0718119	0.0557942	0.1271382
EARTH	2082-07-17 10:28	> 1 mo	0.0546883	0.0544449	0.0074800
EARTH	2106-07-29 09:13	> 1 mo	0.0551939	0.0549067	0.0099107

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