1 min read
Ground-based: NOAO
About the Object
- R.A. PositionR.A. PositionRight ascension – analogous to longitude – is one component of an object's position.18h 36m 24.21s
- Dec. PositionDec. PositionDeclination – analogous to latitude – is one component of an object's position.-23° 54' 12.2"
- ConstellationConstellationOne of 88 recognized regions of the celestial sphere in which the object appears.Sagittarius
- 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.2.6 kpc (8,500 light-years)
- DimensionsDimensionsThe physical size of the object or the apparent angle it subtends on the sky.The entire globular cluster is roughly 24 arcminutes across.
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: K. Sahu, S. Casertano, M. Livio, R.Gilliland (STScI), N. Panagia (ESA/STScI), M. Albrow and M. Potter (STScI) - 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.February - June, 1999
- FiltersFiltersThe camera filters that were used in the science observations.F555W (V) and F814W (I)
- Object NameObject NameA name or catalog number that astronomers use to identify an astronomical object.M22; NGC 6656
- Object DescriptionObject DescriptionThe type of astronomical object.Globular Cluster
- Release DateJune 27, 2001
- Science ReleaseHint of Planet-Sized Drifters Bewilders Hubble Scientists
- CreditN.A.Sharp, REU program/AURA/NOAO/NSF
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Alignment of Hubble, Star Cluster and Galactic Bulge for Microlensing Observation
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Animation begins outside a globular star cluster similar to M22, with the center of the Milky Way in the distance. The camera flies through the center of the cluster and rests with a dark object in the distance. This object, a suspected brown dwarf, passes in front of a star in...
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Details
Claire Andreoli
NASA’s Goddard Space Flight Center
Greenbelt, Maryland
claire.andreoli@nasa.gov
