Asteroids

2015RT82 help

Last update: 2026-09-15 13:01 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.972

Aphelion (Q)

1.501

Eccentricity (e)

0.214

Inclination (i)

4.0

deg

Orbit period (P)

502.3

Earth MOID

0.00817

U parameter

0.7

Next Earth close approach

Date

2044-08-25

Nominal distance (from Earth center)

0.0263

3933902

Maximum Brightness

21.8

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

25.7

mag

Diameter

20 - 40*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2015-09-14

Observatory

Space Surveillance Telescope, Atom Site

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

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.236609

1-sigma variation

1.890E-9

Unit

Eccentricity (e)

Value

0.213825

1-sigma variation

0.000001

Unit

Inclination (i)

Value

3.9636

1-sigma variation

2.085E-5

Unit

Long. of Ascending Node (Ω)

Value

165.1601

1-sigma variation

9.353E-6

Unit

Arg. of Perihelion (ω)

Value

134.3573

1-sigma variation

0.0004

Unit

Mean Anomaly (M)

Value

324.19054

1-sigma variation

0.00023

Unit

Perihelion distance

Value

0.972191

1-sigma variation

Unit

Aphelion distance

Value

1.501028

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.395577

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.018549

1-sigma variation

Unit

MOID

Value

0.008174

1-sigma variation

Unit

Orbit Period

Value

502.2816

1-sigma variation

Unit

U parameter

Value

0.7

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.57068E-18	-1.72610E-15	-3.42767E-14	-4.83034E-15	7.66254E-13	-4.25463E-13
e	-1.72610E-15	8.72984E-13	1.73692E-11	2.19035E-12	-3.88311E-10	2.15870E-10
i	-3.42767E-14	1.73692E-11	4.34907E-10	9.30814E-11	-7.83113E-9	4.33316E-9
Ω	-4.83034E-15	2.19035E-12	9.30814E-11	8.74813E-11	-1.03311E-9	5.26131E-10
ω	7.66254E-13	-3.88311E-10	-7.83113E-9	-1.03311E-9	1.73000E-7	-9.61690E-8
M	-4.25463E-13	2.15870E-10	4.33316E-9	5.26131E-10	-9.61690E-8	5.34916E-8

Date of computation: 2026-09-15 13:01 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

25.664

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

20 - 40*

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 Aegis	ESA orbit determination and impact monitoring system
[2]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

4019

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.551341

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2015-09-14.24519

Unit

Source

[2]

Last Observation

Value

2026-09-15.455986

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

71 (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

[-]

Last Observation

Value

Unit

Source

[-]

Delay (Discarded)

Value

0 (0)

Unit

Source

[-]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[-]

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

Filters

Initial Date: *

Final Date: *

Normalised Only accepted

Max residual (arcsec):

* - these fields are required

Plot

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Note: Ephemerides requests are limited to a maximum of 1000 points and a final date not exceeding 2040/12/31 00:00.

Close Approaches for 2015RT82 from 1950 to 2126

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1959-08-27 23:59	1.4	0.0212421	0.0212342	0.0000026
EARTH	1974-09-11 08:41	< 1 min	0.0732390	0.0732309	0.0000027
EARTH	1985-05-22 22:43	< 1 min	0.1392955	0.1392874	0.0000027
EARTH	2000-07-05 03:26	1.1	0.0722944	0.0722913	0.0000010
EARTH	2015-09-04 22:50	< 1 min	0.0173072	0.0173070	0.0000001
EARTH	2026-09-04 17:58	< 1 min	0.0176167	0.0176165	0.0000001
EARTH	2044-08-25 00:57	< 1 min	0.0262965	0.0262900	0.0000022
EARTH	2073-07-07 23:20	25.6	0.0710208	0.0710170	0.0000012
EARTH	2084-09-12 13:17	5.0	0.0869655	0.0868295	0.0000454
EARTH	2102-06-12 09:42	10.6	0.0714976	0.0714854	0.0000041
EARTH	2113-09-09 17:07	16.0	0.0449513	0.0446680	0.0000944

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
32.40521193	235.61331825	0.00817394	MINIMUM
329.68754131	157.55999836	0.06976526	MINIMUM
345.32904692	176.93833741	0.07164206	SADDLE
178.15023359	13.54347555	0.52057313	SADDLE
358.63896927	13.71733208	1.95560164	SADDLE
179.50677330	194.61866883	2.51656020	MAXIMUM

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MOID Plots

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