2013A&A...558A..97M

Query : 2013A&A...558A..97M

2013A&A...558A..97M - Astronomy and Astrophysics, volume 558A, 97-97 (2013/10-1)

Physical properties of asteroid 308635 (2005 YU55) derived from multi-instrument infrared observations during a very close Earth approach.

MUELLER T.G., MIYATA T., KISS C., GURWELL M.A., HASEGAWA S., VILENIUS E., SAKO S., KAMIZUKA T., NAKAMURA T., ASANO K., UCHIYAMA M., KONISHI M., YONEDA M., OOTSUBO T., USUI F., YOSHII Y., KIDGER M., ALTIERI B., LORENTE R., PAL A., O'ROURKE L. and METCALFE L.

Abstract (from CDS):

The near-Earth asteroid 308635 (2005 YU55) is a potentially hazardous asteroid which was discovered in 2005 and passed Earth on Nov. 8, 2011 at 0.85 lunar distances. This was the closest known approach by an asteroid of several hundred metres in diameter since 1976 when an object of similar size passed at 0.5 lunar distances. We observed 2005 YU55 from the ground with a recently developed mid-IR camera (miniTAO/MAX38) in N and Q bands and with the Submillimeter Array (SMA) at 1.3mm. In addition, we obtained space observations with Herschel/PACS at 70, 100, and 160µm. Our thermal measurements cover a wide range of wavelengths from 8.9µm to 1.3mm and were taken after opposition at phase angles between -97° and -18°. We performed a radiometric analysis via a thermophysical model and combined our derived properties with results from radar, adaptive optics, lightcurve observations, speckle, and auxiliary thermal data. We find that 308635 (2005 YU55) has an almost spherical shape with an effective diameter of 300 to 312m and a geometric albedo pV of 0.055 to 0.075. Its spin axis is oriented towards celestial directions (λecl, βecl)=(60° ±30°, -60° ±15°), which means it has a retrograde sense of rotation. The analysis of all available data combined revealed a discrepancy with the radar-derived size. Our radiometric analysis of the thermal data together with the problem to find a unique rotation period might be connected to a non-principal axis rotation. A low to intermediate level of surface roughness (rms mean slope in the range 0.1-0.3) is required to explain the available thermal measurements. We found a thermal inertia in the range 350-800J/m2/s–0.5/K, very similar to the rubble-pile asteroid 25143 Itokawa and indicating a surface with a mixture of low conductivity fine regolith with larger rocks and boulders of high thermal inertia.

Abstract Copyright: ∼

Journal keyword(s): minor planets, asteroids: individual: glutag{Viz.MP 308635|(308635) 2005 YU55} - radiation mechanisms: thermal - techniques: photometric - infrared: planetary systems

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 * alf Tuc SB* 22 18 30.1124372937 -60 15 34.666361094 5.75 4.18 2.82 1.76 1.02 K3III 131 0

Query : 2013A&A...558A..97M

Basic data :
* alf Tuc -- Spectroscopic Binary
Origin of the objects types :

(Ref) Object type as listed in the reference "Ref"
(acronym) Object type linked to the acronym according to the original reference
() Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular cases

Other object types: 		* (*,CPC,...), SB* (2004A&A,SBC7,...), ** (CCDM), PM* (2018yCat), UV (TD1), NIR (2MASS), IR (IRAS)
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
ICRS coord. (ep=J2000) : 		22 18 30.1124372937 -60 15 34.666361094 (Optical) [ 0.1924 0.2213 90 ] A 2020yCat.1350....0G
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
FK4 coord. (ep=B1950 eq=1950) : 		22 15 05.6827864062 -60 30 35.620989689 [ 0.1924 0.2213 90 ]
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
Gal coord. (ep=J2000) : 		330.2213080331232 -47.9631131339016 [ 0.1924 0.2213 90 ]
Syntax of proper motions is : "pm-ra pm-dec [error ellipse] quality bibcode"
  • pm-ra : mu-ra*cos(dec) (expressed in the ICRS system in mas/yr)
  • pm-dec : mu-dec (expressed in the ICRS system in mas/yr)
  • [error ellipse] : error major axis and minor axis (in mas), orientation angle (in deg)
  • quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the proper motion reference
Proper motions mas/yr : 		-77.000 -32.823 [0.277 0.394 90] A 2020yCat.1350....0G
Syntax of radial velocity (or/and redshift) is : "value [error] (wavelength) quality bibcode"
  • value : radial velocity or/and redshift (Heliocentric frame) according to your Output Options
    (redshift may be not displayed if the data value is <0 and the database inside value is a radial velocity)
  • [error] : error of the corresponding value displayed before
  • (wavelength) : wavelength range of the measurement : Rad, mm, IR, Opt, UV, Xray, Gam or  '∼'(unknown)
  • quality : flag of quality ( A=best quality -> E=worst quality, ∼=unknown quality)
  • bibcode : bibcode of the value's origin
Radial velocity / Redshift / cz : 		V(km/s) 42.2 [0.9] / z(~) 0.000141 [0.000003] / cz 42.20 [0.90]
   E 1953GCRV..C......0W
Syntax of parallax is : 'value quality [error] bibcode'
  • value : parallax value
  • quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality)
  • [error] : mean error
  • bibcode : bibcode of the parallax reference
Parallaxes (mas): 		17.7324 [0.3290] A 2020yCat.1350....0G
Spectral type is made of 3 parts: %coding is composed of 4 parts :
  • the spectral type, which is made of a temperature class, eventually a luminosity class (roman number) and/or spectral peculiarities;
  • a quality letter: A=best quality→E=worst quality, {� } =unknown quality %
  • a quality letter: A=best quality -> E=worst quality, {� } =unknown quality
  • bibcode : bibcode of the spectral type reference
Spectral type: 		K3III B 1989ApJS...71..245K
Syntax of fluxes (or magnitudes) is : "filter-name (System) flux-value [error] quality MultVarFlags bibcode"
  • filter-name : U, B, V, R, I, G, J, H, K, u, g, r, i, z
  • (System) : may be AB (default is Vega)
  • flux-value : value of flux or magnitude
  • [error] : error value
  • quality : flag of quality of the flux value ( A=best quality -> E=worst quality, {� } =unknown quality)
  • MultVarFlags : Mult is zero or one char (J) for joined photometry ; Var can be zero or two chars (V[0-4])
  • bibcode : bibcode of the flux reference
Fluxes (9) :
U 5.75 [~] C 2002yCat.2237....0D
B 4.18 [~] C 2002yCat.2237....0D
V 2.82 [~] C 2002yCat.2237....0D
R 1.76 [~] C 2002yCat.2237....0D
G 2.396663 [0.003655] C 2022yCat.1355....0G
I 1.02 [~] C 2002yCat.2237....0D
J 0.55 [~] C 2002yCat.2237....0D
H -0.08 [~] C 2002yCat.2237....0D
K -0.09 [~] C 2002yCat.2237....0D
SIMBAD within arcmin
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The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (32) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

* alf Tuc HD 211416 PLX 5396 TD1 28957
CCDM J22185-6016A HIC 110130 PLX 5396.00 TIC 394046358
CPC 20.1 6592 HIP 110130 PPM 365714 TYC 9117-1947-1
CPD-60 7561 HR 8502 SACS 486 UBV 19069
FK5 841 IRAS 22150-6030 SAO 255193 UBV M 26287
GC 31183 JP11 3471 SBC7 902 WEB 19767
GCRV 14024 2MASS J22183009-6015345 SBC9 1363 Gaia DR2 6407842789018817280
GEN# +1.00211416 N30 4912 SKY# 42500 Gaia DR3 6407842789021567872

References (131 between 1850 and 2024) (Total 131)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements


velocities : 12    distance : 2    Fe_H : 1    PLX : 5    PM : 6    MK : 8   

   

Observing logs


ISO : 1    IUE : 5   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : * alf Tuc

Link by name to the catalogue in VizieR :

CCDM J22185-6016A CPD-60 7561 FK5 841 HD 211416 HIC 110130
HIP 110130 HR 8502 IRAS 22150-6030 2MASS J22183009-6015345 PLX 5396
PPM 365714 SAO 255193 TD1 28957 TYC 9117-1947-1 Gaia DR2 6407842789018817280
Gaia DR3 6407842789021567872

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