Asteroids

2015YU9 help

Last update: 2026-11-08 00:06 UTC

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Orbital Properties

Epoch

MJD

Orbit type

not NEO

Perihelion (q)

Aphelion (Q)

Eccentricity (e)

Inclination (i)

deg

Orbit period (P)

Earth MOID

U parameter

Next Earth close approach

Date

Nominal distance (from Earth center)

Maximum Brightness

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

Taxonomic type

Rotation period (T)

ORBIT VISUALISATION TOOLS

External links

Proper elements

A connection to orbit determination server is not possible. The displayed data is archived data.

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

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1-sigma variation

Unit

Eccentricity (e)

Value

1-sigma variation

Unit

Inclination (i)

Value

1-sigma variation

Unit

Long. of Ascending Node (Ω)

Value

1-sigma variation

Unit

Arg. of Perihelion (ω)

Value

1-sigma variation

Unit

Mean Anomaly (M)

Value

1-sigma variation

Unit

Perihelion distance

Value

1-sigma variation

Unit

Aphelion distance

Value

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

1-sigma variation

Unit

MOID

Value

1-sigma variation

Unit

Orbit Period

Value

1-sigma variation

Unit

U parameter

Value

1-sigma variation

Unit

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

Download ASCII file:

A connection to orbit determination server is not possible. The displayed data is archived data.

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

Unit

mag

Source

[-]

Slope Parameter (G)

Value

Unit

Source

[-]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[-]

Diameter

Value

Unit

Source

[-]

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]	Estimation	Estimated from absolute magnitude

A connection to orbit determination server is not possible. The displayed data is archived data.

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

4084

Unit

Source

[1]

Unobserved

Value

492

Unit

Source

[1]

Normalized RMS of residuals

Value

0.509525

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2014-04-29.22606

Unit

Source

[2]

Last Observation

Value

2025-07-04.48773

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

105 (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

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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.