J/ApJ/759/L8 WISE/NEOWISE observations of main belt asteroids (Masiero+, 2012)
Preliminary analysis of WISE/NEOWISE 3-Band cryogenic and post-cryogenic
observations of main belt asteroids.
Masiero J.R., Mainzer A.K., Grav T., Bauer J.M., Cutri R.M., Nugent C.,
Cabrera M.S.
<Astrophys. J., 759, L8 (2012)>
=2012ApJ...759L...8M 2012ApJ...759L...8M
ADC_Keywords: Minor planets ; Infrared sources ; Surveys
Keywords: minor planets, asteroids: general
Abstract:
We present preliminary diameters and albedos for 13511 Main Belt
asteroids (MBAs) that were observed during the 3-Band Cryo phase of
the Wide-field Infrared Survey Explorer (WISE; after the outer cryogen
tank was exhausted) and as part of the NEOWISE Post-Cryo Survey (after
the inner cryogen tank was exhausted). With a reduced or complete loss
of sensitivity in the two long wavelength channels of WISE, the
uncertainty in our fitted diameters and albedos is increased to ∼20%
for diameter and ∼40% for albedo. Diameter fits using only the 3.4 and
4.6 µm channels are shown to be dependent on the literature optical
H absolute magnitudes. These data allow us to increase the number of
size estimates for large MBAs which have been identified as members of
dynamical families. We present thermal fits for 14 asteroids
previously identified as the parents of a dynamical family that were
not observed during the fully cryogenic mission.
Description:
In Masiero+, 2011, Cat. J/ApJ/741/68, we focused our analysis on data
taken during the fully cryogenic portion of the WISE mission. For this
work, we analyze the 3-Band Cryo and Post-Cryo Survey observations
taken by WISE as part of the NEOWISE survey. Observations obtained
between Modified Julian Dates (MJDs) of 55414 and 55468 are available
in the 3-Band Cryo Single-Exposure database, served by the Infrared
Science Archive (IRSA). Post-Cryo data, spanning an MJD range of 55468
to 55593, are archived in the NEOWISE Preliminary Post-Cryo database
and also served by IRSA.
We note that the Post-Cryo Survey data have only undergone first-pass
processing, and users are strongly encouraged to consult the
Explanatory Supplement (Cutri et al. 2012wise.rept....1C) associated
with the database.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 54 13672 Thermal model fits for Main Belt Asteroids in the
3-Band Cryo and NEOWISE Post-Cryo Survey
--------------------------------------------------------------------------------
See also:
B/astorb : Orbits of Minor Planets (Bowell+ 2013)
II/190 : IRAS Minor Planet Survey (IMPS) (Tedesco 1992)
VII/91 : IRAS Asteroid and Comet Survey (Veeder+ 1986)
J/A+A/542/A11 : Main-belt asteroids polarimetry. III (Canada-Assandri+, 2012)
J/A+A/545/A131 : Photometry of 8 main belt asteroids (Marciniak+, 2012)
J/A+A/539/A115 : Main-belt asteroids polarimetric survey II (Gil-Hutton+, 2012)
J/ApJ/759/49 : Jovian Trojan with WISE/NEOWISE: taxonomy (Grav+, 2012)
J/ApJ/744/197 : WISE/NEOWISE observations of Hilda asteroids (Grav+, 2012)
J/ApJ/743/156 : NEOWISE obs. of NEOs: preliminary results (Mainzer+, 2011)
J/ApJ/742/40 : Jovian Trojans asteroids with WISE/NEOWISE (Grav+, 2011)
J/ApJ/741/68 : Main Belt asteroids with WISE/NEOWISE. I. (Masiero+, 2011)
J/A+A/529/A86 : Polarimetric survey of main-belt asteroids (Gil-Hutton+, 2011)
J/A+A/529/A107 : Photometry of 4 main belt asteroids (Marciniak+, 2011)
J/A+A/498/313 : Photometry of 3 main belt asteroids (Marciniak+, 2009)
J/A+A/423/381 : Asteroidal I, J, K in the DENIS Survey (Baudrand+, 2004)
J/AJ/123/2070 : ISO deep asteroid search (Tedesco+, 2002)
http://www.minorplanetcenter.net/ : Minor Planet Center home page
http://wise2.ipac.caltech.edu/docs/release/3band/ : WISE 3-Band Cryo release
http://wise2.ipac.caltech.edu/docs/release/postcryo_prelim/ : NEOWISE Post-Cryo
Preliminary Data Release
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- MPC Asteroid name, in MPC packed format
9- 13 F5.2 mag HMag [5.3/19.6]? Literature absolute H band magnitude
15- 18 F4.2 --- G [0.01/0.5]? Magnitude slope parameter
20- 25 F6.2 km Diam [1/304] Asteroid diameter
27- 32 F6.2 km e_Diam The 1σ uncertainty in Diam
34- 38 F5.3 --- pV [0.001/1]? Visible geometrical albedo
40- 44 F5.3 --- e_pV ? The 1σ uncertainty in pV
46- 47 I2 --- N1 [0/38] Number of WISE W1 (3.3um) band observations
49- 50 I2 --- N2 [0/66] Number of WISE W2 (4.6um) band observations
53- 54 I2 --- N3 [0/62] Number of WISE W3 (12um) band observations
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 17-Jul-2014