Ver asteroide 2005 YU55 -datos

Subforo para recomendaciones de objetos a observar tanto de objetos de cielo profundo como estrellas, dibujos, etc.
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alfonso27
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Ver asteroide 2005 YU55 -datos

Mensaje por alfonso27 »

Para el que le interese paso datos que sacado de la pagina http://ssd.jpl.nasa.gov/horizons.cgi#results

HORIZONS Web-Interface
This tool provides a web-based limited interface to JPL` s HORIZONS system which can be used to generate ephemerides for solar-system bodies. Full access to HORIZONS features is available via the primary telnet interface. HORIZONS system news shows recent changes and improvements. A web-interface tutorial is available to assist new users.
Current Settings
Ephemeris Type [change] : OBSERVER
Target Body [change] : Asteroid (2005 YU55)
Observer Location [change] : Observatorio UCM, Madrid [I86] ( 356°16` 26.0` ` E, 40°27` 04.0` ` N, 633.9 m )
Time Span [change] : Start=2011-11-07, Stop=2011-11-17, Step=1 d
Table Settings [change] : QUANTITIES=1,2,9,20,23,24
Display/Output [change] : default (formatted HTML)
Object Data Page

JPL/HORIZONS (2005 YU55) 2011-Nov-07 02:29:02
Rec #:482413 (+COV) Soln.date: 2011-Nov-06_15:50:30 # obs: 777 (2005-2011)

FK5/J2000.0 helio. ecliptic osc. elements (AU, DAYS, DEG, period=Julian yrs):

EPOCH= 2455879.5 ! 2011-Nov-14.00 (CT) Residual RMS= .36774
EC= .430568996996457 QR= .6590704584850872 TP= 2455814.857879497
OM= 35.92457509806348 W= 273.5860384072852 IN= .3409497640456884
A= 1.15741934494035 MA= 51.16624701497686 ADIST= 1.655768231395613
PER= 1.24521 N= .791531073 ANGMOM= .01670328
DAN= .91812 DDN= .96894 L= 309.5106768
B= -.3402822 TP= 2011-Sep-10.3578795

Physical parameters (KM, SEC, rotational period in hours):
GM= n.a. RAD= .200 ROTPER= 18.
H= 21.929 G= .150 B-V= n.a.
ALBEDO= n.a. STYP= C type

ASTEROID comments:
1: soln ref.= JPL#76, PHA OCC=1 radar( 6 delay, 6 Dop.)
2: source=ORB

Results

*******************************************************************************
Ephemeris / WWW_USER Mon Nov 7 02:29:02 2011 Pasadena, USA / Horizons
*******************************************************************************
Target body name: (2005 YU55) {source: JPL#76}
Center body name: Earth (399) {source: DE405}
Center-site name: Observatorio UCM, Madrid
*******************************************************************************
Start time : A.D. 2011-Nov-07 00:00:00.0000 UT
Stop time : A.D. 2011-Nov-17 00:00:00.0000 UT
Step-size : 1440 minutes
*******************************************************************************
Target pole/equ : No model available
Target radii : 0.2 km
Center geodetic : 356.273900,40.4512262,0.6360157 {E-lon(deg),Lat(deg),Alt(km)}
Center cylindric: 356.273900,4860.83873,4116.6492 {E-lon(deg),Dxy(km),Dz(km)}
Center pole/equ : High-precision EOP model {East-longitude +}
Center radii : 6378.1 x 6378.1 x 6356.8 km {Equator, meridian, pole}
Target primary : Sun {source: DE405}
Interfering body: MOON (Req= 1737.400) km {source: DE405}
Deflecting body : Sun, EARTH {source: DE405}
Deflecting GMs : 1.3271E+11, 3.9860E+05 km^3/s^2
Small perturbers: Ceres, Pallas, Vesta {source: SB405-CPV-2}
Small body GMs : 6.32E+01, 1.43E+01, 1.78E+01 km^3/s^2
Atmos refraction: NO (AIRLESS)
RA format : HMS
Time format : CAL
EOP file : eop.111104.p120126
EOP coverage : DATA-BASED 1962-JAN-20 TO 2011-NOV-04. PREDICTS-> 2012-JAN-25
Units conversion: 1 AU= 149597870.691 km, c= 299792.458 km/s, 1 day= 86400.0 s
Table cut-offs 1: Elevation (-90.0deg=NO ),Airmass (>38.000=NO), Daylight (NO )
Table cut-offs 2: Solar Elongation ( 0.0,180.0=NO )
*******************************************************************************
Initial FK5/J2000.0 heliocentric ecliptic osculating elements (AU, DAYS, DEG):
EPOCH= 2455879.5 ! 2011-Nov-14.00 (CT) Residual RMS= .36774
EC= .430568996996457 QR= .6590704584850872 TP= 2455814.857879497
OM= 35.92457509806348 W= 273.5860384072852 IN= .3409497640456884
Asteroid physical parameters (KM, SEC, rotational period in hours):
GM= n.a. RAD= .200 ROTPER= 18.
H= 21.929 G= .150 B-V= n.a.
ALBEDO= n.a. STYP= C type
**************************************************************************************************************************************
Date__(UT)__HR:MN R.A._(ICRF/J2000.0)_DEC R.A.__(a-apparent)__DEC APmag S-brt delta deldot S-O-T /r S-T-O
**************************************************************************************************************************************
$$SOE
2011-Nov-07 00:00 m 15 07 53.50 -14 52 21.7 15 08 32.66 -14 55 00.4 n.a. n.a. 0.01578829789734 -13.4983223 5.3116 /T 174.6027
2011-Nov-08 00:00 m 15 39 08.40 -13 04 51.7 15 39 47.51 -13 07 05.1 n.a. n.a. 0.00805079004487 -13.0747536 12.2295 /T 167.6713
2011-Nov-09 00:00 m 20 39 33.19 +10 51 07.8 20 40 07.97 +10 53 55.1 11.79 7.79 0.00217596564785 1.2084649 89.6049 /T 90.2695
2011-Nov-10 00:00 m 01 35 23.03 +18 24 45.4 01 36 03.92 +18 28 35.2 12.51 6.33 0.00831317576564 13.2926546 160.1864 /T 19.6521
2011-Nov-11 00:00 m 02 06 20.59 +17 31 51.7 02 07 02.05 +17 35 25.0 13.74 6.14 0.01605279641550 13.6053347 166.6223 /T 13.1663
2011-Nov-12 00:00 m 02 17 02.51 +17 09 15.3 02 17 44.12 +17 12 42.1 14.56 6.10 0.02388957001741 13.6786393 168.2041 /T 11.5199
2011-Nov-13 00:00 m 02 22 27.47 +16 57 02.2 02 23 09.17 +17 00 25.5 15.18 6.10 0.03176113999884 13.7241098 168.5055 /T 11.1393
2011-Nov-14 00:00 m 02 25 44.51 +16 49 26.6 02 26 26.25 +16 52 47.8 15.68 6.12 0.03965809606654 13.7676063 168.2877 /T 11.2638
2011-Nov-15 00:00 m 02 27 57.56 +16 44 18.5 02 28 39.34 +16 47 38.3 16.10 6.15 0.04758011276114 13.8150315 167.8101 /T 11.6341
2011-Nov-16 00:00 m 02 29 34.29 +16 40 38.8 02 30 16.09 +16 43 57.5 16.47 6.18 0.05552940062442 13.8681462 167.1854 /T 12.1382
2011-Nov-17 00:00 m 02 30 48.59 +16 37 56.9 02 31 30.42 +16 41 14.8 16.80 6.22 0.06350905114106 13.9275093 166.4700 /T 12.7196
$$EOE
**************************************************************************************************************************************
Column meaning:

TIME

Prior to 1962, times are UT1. Dates thereafter are UTC. Any ` b` symbol in
the 1st-column denotes a B.C. date. First-column blank (" ") denotes an A.D.
date. Calendar dates prior to 1582-Oct-15 are in the Julian calendar system.
Later calendar dates are in the Gregorian system.

The uniform Coordinate Time scale is used internally. Conversion between
CT and the selected non-uniform UT output scale has not been determined for
UTC times after the next July or January 1st. The last known leap-second
is used over any future interval.

NOTE: "n.a." in output means quantity "not available" at the print-time.

SOLAR PRESENCE (OBSERVING SITE)
Time tag is followed by a blank, then a solar-presence symbol:

` *` Daylight (refracted solar upper-limb on or above apparent horizon)
` C` Civil twilight/dawn
` N` Nautical twilight/dawn
` A` Astronomical twilight/dawn
` ` Night OR geocentric ephemeris

LUNAR PRESENCE (OBSERVING SITE)
The solar-presence symbol is immediately followed by a lunar-presence symbol:

` m` Refracted upper-limb of Moon on or above apparent horizon
` ` Refracted upper-limb of Moon below apparent horizon OR geocentric
ephemeris

R.A._(ICRF/J2000.0)_DEC =
J2000.0 astrometric right ascension and declination of target center.
Corrected for light-time. Units: HMS (HH MM SS.ff) and DMS (DD MM SS.f)

R.A._(a-apparent)__DEC. =
Airless apparent right ascension and declination of the target center with
respect to the Earth true-equator and the meridian containing the Earth true
equinox of date. Corrected for light-time, gravitational deflection of light,
stellar aberration, precession & nutation.
Units: HMS (HH MM SS.ff) and DMS (DD MM SS.f)

APmag S-brt =
Asteroid` s approximate apparent visual magnitude & surface brightness:
APmag = H + 5*log10(delta) + 5*log10(r) - 2.5*log10((1-G)*phi1 + G*phi2)
In principle, accurate to ~ +/- 0.1 magnitude. For solar phase angles > 90 deg,
the error could exceed 1 magnitude. No values are output for phase angles
greater than 120 degrees, since the errors could be large and unknown.
Units: NONE & VISUAL MAGNITUDES PER SQUARE ARCSECOND

delta deldot =
Range ("delta") and range-rate ("delta-dot") of target center with respect
to the observer at the instant light seen by the observer at print-time would
have left the target center (print-time minus down-leg light-time); the
distance traveled by a light ray emanating from the center of the target and
recorded by the observer at print-time. "deldot" is a projection of the
velocity vector along this ray, the light-time-corrected line-of-sight from the
coordinate center, and indicates relative motion. A positive "deldot" means the
target center is moving away from the observer (coordinate center). A negative
"deldot" means the target center is moving toward the observer.
Units: AU and KM/S

S-O-T /r =
Sun-Observer-Target angle; target` s apparent solar elongation seen from
observer location at print-time. If negative, the target center is behind
the Sun. Angular units: DEGREES.

The ` /r` column is a Sun-relative code, output for observing sites
with defined rotation models only.

/T indicates target trails Sun (evening sky)
/L indicates target leads Sun (morning sky)

NOTE: The S-O-T solar elongation angle is the total separation in any
direction. It does not indicate the angle of Sun leading or trailing.

S-T-O =
Sun-Target-Observer (~ PHASE ANGLE) angle: the vertex angle at target center
formed by a vector to the apparent center of the Sun and a vector intersecting
the observer at print-time. This measurable angle is within 20 arcseconds
(0.006 deg) of the reduced PHASE ANGLE at observer` s location at print time.
The difference is due to down-leg stellar aberration affecting measured target
position but not apparent solar illumination direction. When computing phase,
Horizons uses the true phase angle, not S-T-O, but the resulting difference
in illuminated fraction is less than 0.001%.
Units: DEGREES



Computations by ...
Solar System Dynamics Group, Horizons On-Line Ephemeris System
4800 Oak Grove Drive, Jet Propulsion Laboratory
Pasadena, CA 91109 USA
Information: http://ssd.jpl.nasa.gov/
Connect : telnet://ssd.jpl.nasa.gov:6775 (via browser)
telnet ssd.jpl.nasa.gov 6775 (via command-line)
Author : Jon.Giorgini@jpl.nasa.gov
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Alfonso
Mensajes: 379
Registrado: Mié Nov 19, 2008 4:16 pm

Ver asteroide 2005 YU55 -datos

Mensaje por Alfonso »

Por si interesa el tema colisiones, el miercoles 16 en el Planetario de Madrid hay una conferencia. Gratis llamando antes para pedir numero.

---------
CICLO CONFERENCIAS DE OTOÑO 2011
Planetario de Madrid
Miercoles, 16 de noviembre a las 20 horas

"Colisiones en órbita, impacto de objetos naturales contra la Tierra y meteorología espacial"

A cargo de Emmet Fletcher. Responsable del Segmento de Vigilancia Espacial del programa europeo SSA, de la Agencia Espacial Europea.
¿Cuál es la probabilidad de que un objeto natural en órbita cercana a la Tierra impacte con nuestro planeta? ¿Cómo se monitorizan estos objetos? ¿Cómo puede afectar la actividad solar en la electrónica de nuestros satélites o en nuestras infraestructuras en tierra? ¿Qué riesgos de colisión tienen nuestros satélites en órbita? ¿Qué soluciones existen a la problemática de la basura espacial?
Saludos,
Alfonso
--------------------------------------
participes sumus, non certatim
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