Asteroids

154276 2002SY50 help

Last update: 2024-04-30 21:31 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Apollo

Perihelion (q)

0.531

Aphelion (Q)

2.878

Eccentricity (e)

0.689

Inclination (i)

8.7

deg

Orbit period (P)

812.8

Earth MOID

0.00403

U parameter

0.0

Next Earth close approach

Date

2025-05-15

Nominal distance (from Earth center)

0.07046

10540956

Maximum Brightness

15.5

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

17.7

mag

Diameter

1060

Taxonomic type

Rotation period (T)

4.823

Discovery Information

Discovery Date

2002-09-30

Observatory

Lincoln Laboratory ETS, New Mexico

Orbit Visualiser

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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

60400.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.704501

1-sigma variation

6.937E-9

Unit

Eccentricity (e)

Value

0.688743

1-sigma variation

1.353E-8

Unit

Inclination (i)

Value

8.7458

1-sigma variation

4.099E-6

Unit

Long. of Ascending Node (Ω)

Value

34.0389

1-sigma variation

1.047E-5

Unit

Arg. of Perihelion (ω)

Value

99.6722

1-sigma variation

1.085E-5

Unit

Mean Anomaly (M)

Value

199.49062

1-sigma variation

4.494E-6

Unit

Perihelion distance

Value

0.530538

1-sigma variation

Unit

Aphelion distance

Value

2.878463

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.020420

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.202958

1-sigma variation

Unit

MOID

Value

0.004034

1-sigma variation

Unit

Orbit Period

Value

812.8198

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.81230E-17	3.84079E-17	3.89835E-16	-6.96719E-15	1.64794E-14	-1.53940E-14
e	3.84079E-17	1.82980E-16	4.32489E-15	3.62476E-14	-3.19740E-15	-5.52536E-14
i	3.89835E-16	4.32489E-15	1.67996E-11	-1.57824E-11	1.80668E-11	-1.73135E-12
Ω	-6.96719E-15	3.62476E-14	-1.57824E-11	1.09647E-10	-1.10162E-10	6.60919E-12
ω	1.64794E-14	-3.19740E-15	1.80668E-11	-1.10162E-10	1.17796E-10	-1.79671E-11
M	-1.53940E-14	-5.52536E-14	-1.73135E-12	6.60919E-12	-1.79671E-11	2.01979E-11

Date of computation: 2024-04-23 10:08 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

4.823

Unit

Source

[5]

Quality

Value

Unit

Source

[5]

Amplitude

Value

0.52

Unit

mag

Source

[5]

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

[1]

[2]

Taxonomy (all)

Value

Q;S/Sr

Unit

Source

[3]

[4]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

17.666

17.01

Unit

mag

Source

[6]

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[6]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.14

Unit

Source

[7]

Diameter

Value

1060

Unit

Source

[7]

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

[8]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) Tubiana, C. et al. (2015) Astron. Astrophys. 584, A97. (2P/Encke, the Taurid complex NEOs and the Maribo and Sutter's Mill meteorites) (10 NEOs)
[2]	EARN	1.) Alexey V. Sergeyev and Benoit Carry A&A, 652 (2021) A59
[3]	EARN	1.) Tubiana, C. et al. (2015) Astron. Astrophys. 584, A97. (2P/Encke, the Taurid complex NEOs and the Maribo and Sutter's Mill meteorites) (10 NEOs) 2.) DeMeo, F.E. et al. (2014) Icarus 227, 112-122. (Mars encounters cause fresh surfaces on some near-Earth asteroids) (contains taxonomic classification of 249 NEAs)
[4]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[5]	EARN	1.) Masi, G. (2002) href="http://www.bellatrixobservatory.org/2002sy50lc.gif"> (composite LC of 2002 SY50)
[6]	ESA ODIM	ESA orbit determination and impact monitoring system
[7]	EARN	1.) Nugent, C.R. et al. (2015) Astrophys. J. 814_117 (13pp) (NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos)(201 NEOs)
[8]	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

7605

Unit

Source

[1]

Unobserved

Value

314

Unit

Source

[1]

Normalized RMS of residuals

Value

0.473412

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2002-08-25.44521

Unit

Source

[2]

Last Observation

Value

2023-06-21.458579

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

1033 (24)

Unit

Source

[1]

Radar Summary

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

Radar

Value

Unit

Source

First Observation

Value

2002-10-28

Unit

Source

[3]

Last Observation

Value

2002-11-05

Unit

Source

[3]

Delay (Discarded)

Value

5 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

2 (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 ODIM	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 154276 2002SY50 from 1950 to 2124

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possibile distance in au	Distance uncert. in au
EARTH	1953-11-04 04:04	< 1 min	0.1207124	0.1207115	0.0000003
EARTH	1956-05-02 09:32	< 1 min	0.1644032	0.1644021	0.0000003
EARTH	1976-05-17 18:54	< 1 min	0.1086302	0.1086285	0.0000006
EARTH	1982-10-19 02:23	< 1 min	0.1970573	0.1970557	0.0000005
EARTH	2002-11-02 13:24	< 1 s	0.0836232	0.0836232	0.0000000
EARTH	2005-04-30 12:50	< 1 s	0.1937989	0.1937985	0.0000001
VENUS	2014-03-07 18:10	< 1 min	0.0258414	0.0258403	0.0000004
EARTH	2025-05-15 18:34	< 1 s	0.0704619	0.0704616	0.0000001
EARTH	2051-10-28 08:37	< 1 min	0.0252534	0.0252509	0.0000008
EARTH	2071-10-30 01:38	< 1 min	0.0087716	0.0087650	0.0000022
EARTH	2094-05-11 11:47	20.1	0.0674161	0.0669887	0.0001434
EARTH	2114-05-22 03:24	24.4	0.1459022	0.1449579	0.0003150
VENUS	2118-10-12 06:53	32.7	0.0497521	0.0486452	0.0003697
EARTH	2120-10-21 14:56	16.8	0.1784680	0.1776984	0.0002565

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