Asteroids

152770 1999RR28 help

Last update: 2025-09-10 00:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.649

Aphelion (Q)

3.107

Eccentricity (e)

0.654

Inclination (i)

7.1

deg

Orbit period (P)

940.3

Earth MOID

0.01687

U parameter

0.0

Next Earth close approach

Date

2048-10-01

Nominal distance (from Earth center)

0.19087

28554413

Maximum Brightness

17.8

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

18.4

mag

Diameter

600 - 1300*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

1999-09-07

Observatory

Lincoln Laboratory ETS, New Mexico

ORBIT VISUALISATION TOOLS

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Long. of Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion distance
Aphelion distance
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period
U parameter

Value

1-sigma variation

Unit

Epoch

Value

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.878419

1-sigma variation

5.629E-10

Unit

Eccentricity (e)

Value

0.654312

1-sigma variation

1.106E-8

Unit

Inclination (i)

Value

7.1433

1-sigma variation

5.077E-6

Unit

Long. of Ascending Node (Ω)

Value

178.1353

1-sigma variation

1.339E-5

Unit

Arg. of Perihelion (ω)

Value

284.6068

1-sigma variation

1.263E-5

Unit

Mean Anomaly (M)

Value

25.02609

1-sigma variation

1.881E-6

Unit

Perihelion distance

Value

0.649347

1-sigma variation

Unit

Aphelion distance

Value

3.107492

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.074527

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.281944

1-sigma variation

Unit

MOID

Value

0.016868

1-sigma variation

Unit

Orbit Period

Value

940.3452

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.16881E-19	-2.83485E-18	1.11098E-15	2.15832E-15	-1.54396E-15	-9.60579E-16
e	-2.83485E-18	1.22255E-16	-3.95320E-14	-1.01972E-13	7.81058E-14	1.09709E-15
i	1.11098E-15	-3.95320E-14	2.57761E-11	3.56459E-11	-2.62930E-11	-9.76879E-13
Ω	2.15832E-15	-1.01972E-13	3.56459E-11	1.79266E-10	-1.66667E-10	1.90321E-12
ω	-1.54396E-15	7.81058E-14	-2.62930E-11	-1.66667E-10	1.59563E-10	-2.49792E-12
M	-9.60579E-16	1.09709E-15	-9.76879E-13	1.90321E-12	-2.49792E-12	3.53691E-12

Date of computation: 2025-09-10 00:30 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

18.383

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

600 - 1300*

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

Radar R

Unit

Source

[3]

Download this part as:

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	Estimation	Estimated from absolute magnitude
[3]	EARN	1.) href="http://echo.jpl.nasa.gov/asteroids/index.html">JPL's NEO Radar Detection Program Webpage

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

13198

Unit

Source

[1]

Unobserved

Value

841

Unit

Source

[1]

Normalized RMS of residuals

Value

0.477578

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1987-04-20.45122

Unit

Source

[2]

Last Observation

Value

2023-06-08.248836

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

722 (6)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

2005-03-25

Unit

Source

[3]

Last Observation

Value

2005-04-03

Unit

Source

[3]

Delay (Discarded)

Value

6 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

1 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

7 (0)

Unit

Source

[1]

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

Sources

No.	Name	Additional
[1]	ESA Aegis	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 152770 1999RR28 from 1950 to 2125

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1969-04-04 10:15	< 1 s	0.1644551	0.1644550	0.0000000
EARTH	1987-03-29 08:20	< 1 s	0.0498828	0.0498826	0.0000001
EARTH	2005-03-29 16:12	< 1 s	0.0568136	0.0568136	0.0000000
EARTH	2023-04-06 17:53	< 1 s	0.1919096	0.1919094	0.0000001
EARTH	2048-10-01 21:16	< 1 s	0.1908745	0.1908741	0.0000001
EARTH	2066-10-08 06:58	< 1 s	0.0872172	0.0872170	0.0000001
EARTH	2084-10-11 04:30	< 1 s	0.0532913	0.0532912	0.0000000
EARTH	2102-10-11 16:17	< 1 min	0.0631783	0.0631774	0.0000003
EARTH	2120-10-05 09:40	< 1 min	0.1559350	0.1559314	0.0000012

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
43.99794151	82.46400711	0.01663298	MINIMUM
315.25570504	277.29289782	0.04445677	MINIMUM
359.29097426	359.08563350	0.34795893	SADDLE
359.85805670	180.30388249	1.66278935	SADDLE
179.88223207	180.57317872	2.10200347	SADDLE
180.06457104	0.65742846	4.08560142	MAXIMUM

Download:

MOID Plots

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