-------- Original Message --------
Subject:        SILS Bulletin 09-01 Geologic map of Helen Planitia quad Venus
Date:   Fri, 23 Jan 2009 09:05:36 -0700
From:   Sheryle J Jackson <[log in to unmask]>
To:     undisclosed-recipients:;








SILS Information Bulletin

Number: 09-01 *Geologic map of the Helen Planitia Quadrangle (V-52) Venus *
* *By Ivan Lopez and Vicki L. Hansen
Date: January 23 2009

*Stock #: 208823 (Scientific Investigation Map 3026)*
*Price: $7.00 for the map and report plus $5.00 handling per order*

Prepared for the National Aeronautics and Space Administration, the
geologic map of the Helen Planitia quadrangle is the latest addition to
a series of maps covering the planet Venus. This map is based on data
from the Magellan spacecraft.

The Magellan spacecraft orbited Venus from August 10, 1990, until it
plunged into the Venusian atmosphere on October 12, 1994. Approximately
950 orbits of high-resolution gravity observations were obtained between
September 1992 and May 1993 while Magellan was in an elliptical orbit.
An additional 1500 orbits were obtained following orbit circularization
in mid-1993. These data exist as a 75 degree by 75 degree harmonic
field. Mission objectives for the project included (1) improving the
knowledge of the geological processes, surface properties, and geologic
history of Venus by analysis of surface radar characteristics,
topography, and morphology and (2) improving the knowledge of the
geophysics of Venus by analysis of Venusian gravity.

The Helen Planitia quadrangle (V-52) is located in the southern
hemisphere of Venus between latitude 25 degree south and 50 degree
south, and between longitude 240 degree east and 270 degree east.
Regionally the map area is located at the southern limit of an area of
enhanced tectonomagmatic activity and extensional deformation marked by
a triangle that has highland apexes at Beta, Alta, and Themis Regiones
(BAT anomaly) and is connected by the large extensional belts of Devana,
Hecate, and Parga Chasmata. The BAT anomaly covers approximately 20
percent of the Venusian surface.

For a complete list of planetary maps or to purchase USGS maps online
visit the USGS store at */_http://store.usgs.gov_/* . This map can be
downloaded as a 56”x 36” PDF document with an accompanying 26 page
pamphlet from */_http://pubs.usgs.gov/sim/3026/_/*. Contact the USGS
Science Information and Library Services (SILS) at 1-888-ASK-USGS for
information on this or other USGS products.


Sheryle Girk-Jackson 303 202 4176, FAX 303 202 4633, email:
[log in to unmask] <mailto:[log in to unmask]>


Listing of Maps covering the planet *Venus *available for purchase from
the US Geological Survey

*_Partial Title Ordering #_*
Altimetric & Shaded Relief Map of Venus 27393
Aphrodite Planitia Region Map of Venus 28662
Atlas Northern Hemisphere of Venus 28206
Geologic Map of Beta Region Quad (V-17) Venus 208568
Geo Map of Helen Planitia Quad (V-52) Venus 208823
Geo Map of Bell Region Quad (V-9) Venus 113747
Geo Map of Carson Quad (V-43) Venus 28800
Geo Map of Galindo Quad (V-40) Venus 28794
Geo Map of Aino Planitia Quad (V-46) Venus 116099
Geo Map of Atalanta Planitia Quad (V-4) Venus 116100
Geo Map of Barrymore Quad (V-59) Venus 28792
Geo Map of Bereghinya Palnitia Quad (V-8) Venus 116201
Geo Map of Diana Chasma Quad (V-37) Venus 113746
Geo Map of Kaiwan Fluctus Quad (V-44) Venus 113743
Geo Map of Lavania Planitia Quad (V-55) Venus 28856
Geo Map of Mead Quad (V-21) Venus 206307
Geo Map of Meskhent Tessera Quad (V-3) Venus 208510
Geo Map of Mylitta Fluctus Quad (V-61) Venus 207050
Geo Map of Nemesis Tesserae (V-13) Venus 206352
Geo Map of Rusalka Palnitia Quad (V-25) Venus 116037
Geo Map of Taussig Quad (V-39) Venus 205577
Geo Mpa of Ovda Region (V-35) Venus 204959
Geo Map of Pandrosos Dorsa Quad (V-5) Venus 28889
Geo Map of Sif Mons Quad (V-31) Venus 207751
Geo Map of Sappho Patera Quad (V-20) Venus 28816
Geomorphic/Geo Map of N. Hemisphere Venus 28230
Guinevera Planitia Region of Venus 28644
Helen Planitia Region of Venus 28663
Ishtar Terra Region of Venus 28675
Lada Terra Region of Venus 28694
Lavinia Planitia Region of Venus 28661
Niobe Planitia region of Venus 28654
Sedna Planitia Region of Venus 28653
The Planet Venus in 4 Map Sheets 28632
Topographic shaded relief of Venus 27695







Sheryle J. Girk-Jackson
Technical Information Specialist/Business Acquisitions
USGS/ESIC