Asteroids

177049 2003EE16 help

Last update: 2026-07-30 09:40 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.547

Aphelion (Q)

2.289

Eccentricity (e)

0.614

Inclination (i)

0.7

deg

Orbit period (P)

616.6

Earth MOID

0.00014

U parameter

0.0

Next Earth close approach

Date

2040-02-03

Nominal distance (from Earth center)

0.14594

21832236

Maximum Brightness

18.8

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

19.8

mag

Diameter

290 - 700*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2003-03-08

Observatory

LPL/Spacewatch II

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

1.417782

1-sigma variation

2.778E-9

Unit

Eccentricity (e)

Value

0.614157

1-sigma variation

1.770E-8

Unit

Inclination (i)

Value

0.6523

1-sigma variation

3.958E-6

Unit

Long. of Ascending Node (Ω)

Value

127.2261

1-sigma variation

0.0002

Unit

Arg. of Perihelion (ω)

Value

259.4911

1-sigma variation

0.0002

Unit

Mean Anomaly (M)

Value

355.45555

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.547042

1-sigma variation

Unit

Aphelion distance

Value

2.288522

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.008557

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.220752

1-sigma variation

Unit

MOID

Value

0.000144

1-sigma variation

Unit

Orbit Period

Value

616.6128

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	7.71461E-18	-1.64069E-17	2.80249E-16	-2.94258E-14	2.70217E-14	-2.42778E-14
e	-1.64069E-17	3.13327E-16	6.56641E-16	1.00153E-13	-5.83571E-14	5.91414E-14
i	2.80249E-16	6.56641E-16	1.56620E-11	-3.85988E-10	3.85804E-10	-6.46136E-14
Ω	-2.94258E-14	1.00153E-13	-3.85988E-10	5.09220E-8	-5.09193E-8	2.37561E-11
ω	2.70217E-14	-5.83571E-14	3.85804E-10	-5.09193E-8	5.09235E-8	-1.59280E-11
M	-2.42778E-14	5.91414E-14	-6.46136E-14	2.37561E-11	-1.59280E-11	7.71612E-11

Date of computation: 2026-07-30 09:40 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

19.786

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

290 - 700*

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 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

8354

Unit

Source

[1]

Unobserved

Value

559

Unit

Source

[1]

Normalized RMS of residuals

Value

0.677276

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2002-05-17.26278

Unit

Source

[2]

Last Observation

Value

2025-03-31.3479

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

351 (7)

Unit

Source

[1]

Radar Summary

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

Radar

Value

Unit

Source

First Observation

Value

2014-07-02

Unit

Source

[3]

Last Observation

Value

2014-07-02

Unit

Source

[3]

Delay (Discarded)

Value

1 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

1 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

2 (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

Filters

Initial Date: *

Final Date: *

Normalised Only accepted

Max residual (arcsec):

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Computation parameters

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Initial Date: *

Final Date: *

Output option:

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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 177049 2003EE16 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	1959-01-31 03:35	< 1 min	0.0978309	0.0977955	0.0000118
EARTH	1960-06-28 16:50	< 1 min	0.1427661	0.1427369	0.0000097
VENUS	1963-12-07 22:50	< 1 min	0.0362571	0.0362547	0.0000008
EARTH	1986-01-30 13:04	< 1 min	0.0858865	0.0858811	0.0000018
EARTH	1987-06-29 04:02	< 1 min	0.1532397	0.1532362	0.0000012
VENUS	1989-05-24 09:09	< 1 min	0.0174806	0.0174805	0.0000000
MARS	2006-07-19 11:46	< 1 s	0.0386339	0.0386336	0.0000001
EARTH	2013-02-02 09:58	< 1 s	0.1468211	0.1468208	0.0000001
EARTH	2014-07-01 21:51	< 1 s	0.0966478	0.0966478	0.0000000
VENUS	2029-10-04 02:08	< 1 min	0.0403892	0.0403887	0.0000002
EARTH	2040-02-03 08:43	< 1 min	0.1459395	0.1459373	0.0000007
EARTH	2041-07-01 16:49	< 1 min	0.0992324	0.0992303	0.0000007
EARTH	2067-01-31 14:23	< 1 min	0.0874437	0.0874421	0.0000005
EARTH	2068-06-28 19:41	< 1 min	0.1595791	0.1595772	0.0000006
VENUS	2082-01-21 18:50	< 1 min	0.0435964	0.0435943	0.0000007
EARTH	2094-01-30 23:22	< 1 min	0.0747264	0.0747205	0.0000020
EARTH	2095-06-29 15:17	< 1 min	0.1631800	0.1631745	0.0000018
VENUS	2114-04-13 14:13	< 1 min	0.0184431	0.0184429	0.0000001
EARTH	2121-02-05 07:04	< 1 min	0.1673996	0.1673863	0.0000044
EARTH	2122-07-04 22:29	< 1 min	0.0743453	0.0743306	0.0000049

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
60.17251526	21.63636578	0.00014363	MINIMUM
297.42204796	179.94416791	0.00445933	MINIMUM
357.79919722	279.52863031	0.44991701	SADDLE
179.47434455	101.64614851	1.28512849	SADDLE
357.78360736	99.50634451	1.55021862	SADDLE
179.47595325	281.64969202	3.28506278	MAXIMUM

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MOID Plots

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