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Globular Cluster 47 Tucanae, Home to 35,000 Stars
About the Object
- R.A. PositionR.A. PositionRight ascension – analogous to longitude – is one component of an object's position.00h 24m 5.19s
- Dec. PositionDec. PositionDeclination – analogous to latitude – is one component of an object's position.-72° 4' 49.9"
- ConstellationConstellationOne of 88 recognized regions of the celestial sphere in which the object appears.Tucana
- DistanceDistanceThe physical distance from Earth to the astronomical object. Distances within our solar system are usually measured in Astronomical Units (AU). Distances between stars are usually measured in light-years. Interstellar distances can also be measured in parsecs.About 15,000 light-years (4.6 kpc)
- DimensionsDimensionsThe physical size of the object or the apparent angle it subtends on the sky.The width of the image is 120 arcseconds (~9 light-years). Diameter: About 200 light-years. Magnitude: V4.5, B-V0.88
About the Data
- Data DescriptionData DescriptionProposal: A description of the observations, their scientific justification, and the links to the data available in the science archive.
Science Team: The astronomers who planned the observations and analyzed the data. "PI" refers to the Principal Investigator.Principal Astronomers: R. Gilliland (STScI), T. Brown (High Altitude Observatory), A. Burrows (U. Arizona), W. Cochran (U. Texas, Austin), P. Edmonds (SAO), S. Frandsen (Aarhus U.), P. GuhaThakurta (UCSC), D. Lin (UCSC), G. Marcy (UCB), M. Mayor (Observatoire de Geneve), E. Milone (U. Calgary), D. Naef (Observatoire de Geneve), A. Sarajedini (Wesleyan U.), S. Sigurdsson (PSU), D. VandenBerg (UVic), S. Vogt (UCSC), M. Albrow (STScI), N. Baliber (U. Texas, Austin), H. Bruntt (Aarhus U.), D. Charbonneau (High Altitude Observatory), P. Choi (UCSC), J. Howell (UCSC), R. Stagg (U. Calgary), M. Williams (U. Calgary). - InstrumentInstrumentThe science instrument used to produce the data.HST>WFPC2
- Exposure DatesExposure DatesThe date(s) that the telescope made its observations and the total exposure time.July 3 - 11, 1999, Exposure Time: 61.7 hours
- FiltersFiltersThe camera filters that were used in the science observations.F336W (U), F555W (V), and F814W (I)
- Object NameObject NameA name or catalog number that astronomers use to identify an astronomical object.47 Tucanae, NGC 104
- Object DescriptionObject DescriptionThe type of astronomical object.Globular Cluster
- Release DateOctober 31, 2000
- Science ReleaseAstronomers Ponder Lack of Planets in Globular Cluster
- CreditNASA and Ron Gilliland (Space Telescope Science Institute)
Color Info
Color InfoA brief description of the methods used to convert telescope data into the color image being presented.
Blue: F336W (U) Green: F555W (V) Red: F814W (I)
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Last Updated
Mar 28, 2025
Contact
Media
Claire Andreoli
NASA’s Goddard Space Flight Center
Greenbelt, Maryland
claire.andreoli@nasa.gov
