Asteroids

438017 2003YO3 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.919

Aphelion (Q)

1.980

Eccentricity (e)

0.366

Inclination (i)

24.6

deg

Orbit period (P)

637.5

Earth MOID

0.05963

U parameter

0.0

Next Earth close approach

Date

2031-12-28

Nominal distance (from Earth center)

0.17392

26018314

Maximum Brightness

18.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

18.6

mag

Diameter

380

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2003-12-18

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

1.449661

1-sigma variation

3.169E-9

Unit

Eccentricity (e)

Value

0.366074

1-sigma variation

4.717E-8

Unit

Inclination (i)

Value

24.6108

1-sigma variation

1.074E-5

Unit

Long. of Ascending Node (Ω)

Value

291.3558

1-sigma variation

1.326E-5

Unit

Arg. of Perihelion (ω)

Value

168.7536

1-sigma variation

1.515E-5

Unit

Mean Anomaly (M)

Value

183.65255

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.918978

1-sigma variation

Unit

Aphelion distance

Value

1.980344

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.940712

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.060063

1-sigma variation

Unit

MOID

Value

0.059629

1-sigma variation

Unit

Orbit Period

Value

637.5265

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.00421E-17	1.68524E-18	-2.85442E-15	9.47181E-15	-6.06742E-15	-1.73099E-14
e	1.68524E-18	2.22532E-15	8.62634E-14	-9.45744E-14	1.36606E-13	7.23911E-14
i	-2.85442E-15	8.62634E-14	1.15333E-10	6.15044E-12	-7.90845E-13	9.13316E-12
Ω	9.47181E-15	-9.45744E-14	6.15044E-12	1.75733E-10	-1.68114E-10	-1.14236E-11
ω	-6.06742E-15	1.36606E-13	-7.90845E-13	-1.68114E-10	2.29552E-10	-2.05237E-11
M	-1.73099E-14	7.23911E-14	9.13316E-12	-1.14236E-11	-2.05237E-11	4.44135E-11

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

18.58

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.525

Unit

Source

[2]

Diameter

Value

380

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]	EARN	1.) Joseph R. Masiero et al 2020 Planet. Sci. J. 1 5
[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

7745

Unit

Source

[1]

Unobserved

Value

211

Unit

Source

[1]

Normalized RMS of residuals

Value

0.579425

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2003-12-18.06647

Unit

Source

[2]

Last Observation

Value

2025-03-02.184608

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

217 (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

2018-01-09

Unit

Source

[3]

Last Observation

Value

2018-01-09

Unit

Source

[3]

Delay (Discarded)

Value

1 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

1 (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 438017 2003YO3 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	2011-01-26 21:17	< 1 min	0.1627748	0.1627742	0.0000002
EARTH	2018-01-16 12:18	< 1 s	0.0707433	0.0707432	0.0000001
EARTH	2025-01-07 08:22	< 1 min	0.0811263	0.0811259	0.0000001
EARTH	2031-12-28 05:22	< 1 min	0.1739217	0.1739209	0.0000003
EARTH	2100-01-20 21:54	< 1 min	0.0988965	0.0988945	0.0000006
EARTH	2107-01-12 06:17	< 1 min	0.0630154	0.0630146	0.0000002
EARTH	2114-01-01 06:04	< 1 min	0.1439090	0.1439065	0.0000008

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
8.43885427	9.95329249	0.05972352	MINIMUM
172.68435617	174.23707988	0.97390435	SADDLE
355.92292253	173.48589942	1.93274404	SADDLE
181.47160299	359.77955632	2.96194258	MAXIMUM

Download:

MOID Plots

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