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1989-05-19
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SAGUARO ASTRONOMY CLUB DATABASE VERSION 5.0
This compilation of data was begun in an effort to provide a comprehensive
observing list for use at the telescope. This data is released for private
use of anyone who wishes to use this database. Please do not sell this
database in any form.
The members of the Saguaro Astronomy Club (pronounced sa-war-oh) of Phoenix,
Arizona have provided much of the effort to compile this database. However, it
could not have been completed without the skill of a variety of people who are
not SAC members. Thank you to all.
The database is in ASCII format and is delimited with a double quote (").
A description of the fields and what data they contain follows:
Field Number: 1 Name: OBJECT Size: 17
Usually the NGC number is in field #1, but for objects with no NGC value
the alphabetical name used is listed below. These abbreviations are also
used in field #2 as an OTHER name for some objects.
Abell - George Abell (planetary nebulae and galaxy clusters)
AM - Arp-Madore (globular clusters)
Antalova - (open clusters)
Bark - Barkhatova (open clusters)
B - Barnard (dark nebulae)
Basel - (open clusters)
Berk - Berkeley (open clusters)
Be - Bernes (dark nebulae)
Biur - Biurakan (open clusters)
Blanco - (open clusters)
Bochum - (open clusters)
Ced - Cederblad (bright nebulae)
Cr - Collinder (open clusters)
Czernik - (open clusters)
Do - Dolidze (open clusters)
DoDz - Dolidze-Dzimselejsvili (open clusters)
Dun - Dunlop (globular clusters)
Fein - Feinstein (open clusters)
Frolov - (open clusters)
Gum - (bright nebulae)
H - William Herschel (globular clusters)
Haffner - (open clusters)
Harvard - (open clusters)
He - Henize (planetary nebulae)
Hogg - (open clusters)
HP - Haute Provence (globular clusters)
Hu - Humason (planetary nebulae)
IC - 1st and 2nd Index Catalogs to the NGC
(All types of objects except dark nebulae)
Isk - Iskudarian (open clusters)
J - Jonckheere (planetary nebulae)
K - Kohoutek (planetary nebulae)
King - (open clusters)
Lac - Lacaille (globular clusters)
Loden - (open clusters)
LDN - Lynds (dark nebulae)
Lynga - (open clusters)
M - Messier (all types of objects except dark nebula)
Mrk - Markarian (open clusters and galaxies)
Mel - Melotte (open clusters)
M1 - Minkowski (planetary nebulae)
NGC - New General Catalog of Nebulae & Clusters of Stars.
(All types of objects except dark nebulae)
Pal - Palomar (globular clusters)
Pismis - (open clusters)
PK - Perek & Kohoutek (planetary nebulae)
RCW - Rodgers, Campbell, & Whiteoak (bright nebulae)
Roslund - (open clusters)
Ru - Ruprecht (open clusters)
Sa - Sandqvist (dark nebulae)
Sher - (open clusters)
Sh - Sharpless (bright nebulae)
SL - Sandqvist & Lindroos (dark nebulae)
Steph - Stephenson (open clusters)
Stock - (open clusters)
Ter - Terzan (globular clusters)
Tombaugh - (open clusters)
Ton - Tonantzintla (globular clusters)
Tr - Trumpler (open clusters)
UGC - Uppsala General Catalog (galaxies)
UKS - United Kingdom Schmidt (globular clusters)
Upgren - (open clusters)
vdB - van den Bergh (open clusters, bright nebulae)
vdBH - van den Bergh & Herbst (bright nebulae)
vdB-Ha - van den Bergh-Hagen (open clusters)
Vy - Vyssotsky (planetary nebulae)
Waterloo - (open clusters)
Westr - Westerlund (open clusters)
Field Number: 2 Name: OTHER Size: 17
Other catalog designations by which this object may be known.
The same abbreviations as the OBJECT field are used in this field.
Field Number: 3 Name: TYPE Size: 5
Type of object. The code that applies is:
ASTER Asterism
BRTNB Bright Nebula
CL+NB Cluster with Nebulosity
DRKNB Dark Nebula
GALCL Galaxy cluster
GALXY Galaxy
GLOCL Globular Cluster
GX+DN Diffuse Nebula in a Galaxy
GX+GC Globular Cluster in a Galaxy
G+C+N Cluster with Nebulosity in a Galaxy
LMCCN Cluster with Nebulosity in the LMC
LMCDN Diffuse Nebula in the LMC
LMCGC Globular Cluster in the LMC
LMCOC Open cluster in the LMC
NONEX Nonexistent in RNGC
OPNCL Open Cluster
PLNNB Planetary Nebula
SMCCN Cluster with Nebulosity in the SMC
SMCDN Diffuse Nebula in the SMC
SMCGC Globular Cluster in the SMC
SMCOC Open cluster in the SMC
QUASR Quasar
UVSOB Unverified Southern Object
#STAR # Stars (#=1, 2, 3, 4, 5, etc.)
Nonexistent means Sulentic and Tifft couldn't find it on the POSS
plates for inclusion in the RNGC.
Field Number: 4 Name: CON Size: 3
Constellation in which the object is found in IAU format, given in
the table below. Only upper case abbreviations are used for ease of
programming using case-sensitive commands.
ANDROMEDA AND LACERTA LAC
ANTLIA ANT LEO LEO
APUS APS LEO MINOR LMI
AQUARIUS AQR LEPUS LEP
AQUILA AQL LIBRA LIB
ARA ARA LUPUS LUP
ARIES ARI LYNX LYN
AURIGA AUR LYRA LYR
BOOTES BOO MENSA MEN
CAELUM CAE MICROSCOPIUM MIC
CAMELOPARDALIS CAM MONOCEROS MON
CANCER CNC MUSCA MUS
CANES VENATICI CVN NORMA NOR
CANIS MAJOR CMA OCTANS OCT
CANIS MINOR CMI OPHIUCHUS OPH
CAPRICORNUS CAP ORION ORI
CARINA CAR PAVO PAV
CASSIOPEIA CAS PEGASUS PEG
CENTAURUS CEN PERSEUS PER
CEPHEUS CEP PHOENIX PHE
CETUS CET PICTOR PIC
CHAMAELEON CHA PISCES PSC
CIRCINUS CIR PISCES AUSTRINUS PSA
COLUMBA COL PUPPIS PUP
COMA BERENICES COM PYXIS PYX
CORONA AUSTRALIS CRA RETICULUM RET
CORONA BOREALIS CRB SAGITTA SGE
CORVUS CRV SAGITTARIUS SGR
CRATER CRT SCORPIUS SCO
CRUX CRU SCULPTOR SCL
CYGNUS CYG SCUTUM SCT
DELPHINUS DEL SERPENS SER
DORADO DOR SEXTANS SEX
DRACO DRA TAURUS TAU
EQUULEUS EQU TELESCOPIUM TEL
ERIDANUS ERI TRIANGULUM AUSTRALE TRA
FORNAX FOR TRIANGULUM TRI
GEMINI GEM TUCANA TUC
GRUS GRU URSA MAJOR UMA
HERCULES HER URSA MINOR UMI
HOROLOGIUM HOR VELA VEL
HYDRA HYA VIRGO VIR
HYDRUS HYI VOLANS VOL
INDUS IND VULPECULA VUL
Field Number: 5 Name: RA Size: 7 characters
Right Ascension of the object in equinox 2000.0 coordinates. The RA is
in the form XX XX.X, such as 14 34.8. Use leading or trailing zeros.
Field Number: 6 Name: DEC Size: 6
Declination of the object in equinox 2000.0 coordinates. The DEC is in
the form +/-XX XX, such as +48 10 or -88 04. Use the sign and leading or
trailing zeros. The declination is given in degrees and minutes.
Field Number: 7 Name: MAG Size: 4
Magnitude to nearest tenth in the form XX.X, such as 12.3. There are
many objects which have no published magnitude we could find, they have
been assigned a magnitude of 99.9. Dark nebulae obviously have no
magnitude, so we assigned them a mag of 79.9 to differentiate them from
objects with no magnitude given.
Field Number: 8 Name: U2000 Size: 16
The charts in the Uranometria 2000.0 that map the area of sky in which
the object is located. It is not guaranteed that all objects plotted on
U2000 are contained in the database but we are trying.
Field Number: 9 Name: TIRION Size: 12
The charts in the Tirion Sky Atlas 2000.0 that map the area of sky in which
the object is located. This is included so that a less detailed view of the
area will be available to star hoppers.
Field Number: 10 Name: DESCR Size: 45
Visual description of the object. Most of these are from the NGC, some
are from prominent amateurs. Back issues of Deep Sky Magazine, Astronomy
magazine, Sky and Telescope magazine and Burnham's Celestial Handbook are
used as a source of some of these descriptions. The descriptions use the
abbreviations from the NGC and Burnham's. They are given below:
! remarkable object !! very remarkable object
am among n north
att attached N nucleus
bet between neb nebula, nebulosity
B bright P w paired with
b brighter p pretty (before F,B,L or S)
C compressed p preceding
c considerably P poor
Cl cluster R round
D double Ri rich
def defined r not well resolved, mottled
deg degrees rr partially resolved
diam diameter rrr well resolved
dif diffuse S small
E elongated s suddenly
e extremely s south
er easily resolved sc scattered
F faint susp suspected
f following st star or stellar
g gradually v very
iF irregular figure var variable
inv involved nf north following
irr irregular np north preceding
L large sf south following
l little sp south preceding
mag magnitude 11m 11th magnitude
M middle 8... 8th magnitude and fainter
m much 9...13 9th to 13th magnitude
If you have never dealt with the NGC abbreviations before, perhaps
a few examples will help.
NGC# Description Decoded descriptions
214 pF, pS, lE, gvlbM pretty faint, pretty small, little elongated
gradually very little brighter in the middle
708 vF, vS, R very faint, very small, round
891 B, vL, vmE bright, very large, very much elongated
7009 !, vB, S remarkable object, very bright, small
7089 !! B, vL, mbM extremely remarkable object, bright, very
rrr, stars mags large, much brighter middle, resolved,
13..... stars 13th magnitude and dimmer
2099 ! B, vRi, mC remarkable object, bright, very rich,
much compressed
6643 pB,pL,E50,2 st p pretty bright, pretty large,
elongated in position angle 50 degrees,
two stars preceding
Field Number: 11 Name: SIZE Size: 11
Size of object in minutes of arc (') or seconds of arc (''). Seconds of arc is
marked with two single quotes so as to free the double quote symbol for use as
a delimiter.
Field Number: 12 Name: CLASS Size: 9
Several professional classification schemes are contained here.
----Trumpler type for open clusters-----
Concentration
I. Detached, strong concentration toward the center
II. Detached, weak concentration toward the center
III. Detached, no concentration toward the center
IV. Not well detached from surrounding star field
Range in brightness
1. Small range 2. Moderate range 3. Large range
Richness
p Poor (<50 stars)
m Moderately rich (50-100 stars)
r Rich (>100 stars)
An "n" following the Trumpler type denotes nebulosity in cluster
----Shapley-Sawyer concentration rating for globular clusters---
The values range from 1 to 12, smaller numbers are more
concentrated clusters.
----Vorontsov-Velyaminov type for planetary nebulae-----
1. Stellar
2. Smooth disk (a, brighter center; b, uniform brightness;
c, traces of ring structure)
3. Irregular disk (a, very irregular brightness distribution;
b, traces of ring structure)
4. Ring structure
5. Irregular form similar to diffuse nebula
6. Anomalous form, no regular structure
Some very complex forms may combine two types.
-----Hubble type for galaxies-----
E elliptical, E0 is roundest to E7 is flattest
subgroups; 'd'is dwarf, 'c'is supergiant, 'D' has diffuse halo
S Spiral, 'a' has tightly wound arms, 'b' has moderately wound
arms and 'c' has loosely wound arms
SB Spiral with central bar
Ir Irregular
Field Number: 13 Name: NSTS Size: 4
Number of stars within a cluster from a study of POSS plates by Lynga.
Field Number: 14 Name: BRSTR Size: 5
Magnitude of brightest star in cluster or central star of planetary
nebula.
Field Number: 15 Name: NOTES Size: 60
Much of this field came from UGC Notes provided by Jim Lucyk. Most of the
abbreviations used by the NGC apply here also. An abbreviation that always
comes first is PA for Position Angle of the elongation of the main object.
Other PA's in the NOTES are companion objects' angle in relation to the main
object. Another abbreviation that is used often is P w N ( paired with NGC
###) or P w U ( paired with UGC ###). Most of the data on companions to an
object have been marked to make recognition easier, but some did not fit into
the 60 spaces we alloted. So, the data is always in this order: distance in
minutes from main object, PA from main object, then size and mag of companion.
Example: P w N4566 @ 4.5,120,0.9X0.7 says that the main object is paired with
NGC 4566 and is at 4.5', PA 120 degrees and 0.9'X0.7'.
Field Number: 16 Name: SOURCE Size: 5
Information on where we got our information.
N=NGC, B=Brian Skiff correspondence, D=Deep Sky Magazine
C=Dr. Harold Corwin correspondence, S=Sky Catalog 2000.0
J=Dr. Jack Marling correspondence, W=Webb Society Handbooks
G=Steve Gottlieb correspondence, N2=NGC 2000
A=Astronomy Magazine U=Uppsala Galaxy Catalog
HINTS ON USING THE SAC 5.0 DATABASE
The layout of the data was thought out to try and let the user get the type of
listing that is preferred with as few problems as possible. People who have
taken the time to write or call have said that a wide variety of database
managers will make it easier for the sophisticated deep sky observer to
utilize the data in a variety of forms. People have used dBase III, Paradox,
PC File, PC File dB, Microsoft Works, Wampum and a few have used a word
processor to search and sort the SAC database. Several people have considered
burning it into a ROM for use in a telescope control program.
Of course, if you do not need such complex search routines, the SACREP
program from A.J. Crayon and Dan Ward will suffice with no problem. It will
allow the user to make a fine observing list quickly.
The problem which gave us the most trouble is choosing what to put into the
Name and Other columns. We tried to set up a hierarcy that would introduce
some consistency in the data. Here is some general info on how to navigate
around the database.
1) If there is an NGC or IC number, that is in the NAME column.
2) The Messier number is in the OTHER column.
Now the fun starts.
3) If it is a non-NGC object and is a planetary nebula, then it has a
PK number with any other designation in the OTHER column.
4) If it is a non-NGC object and is a Bright Nebula then it probably has a
Sharpless (Sh) or Cederblad (Ced) number in the NAME column and the OTHER
column for cross references.
5) If it is a non-NGC object and is a Galaxy then it probably has a
UGC (Uppsala Galaxy Catalog) number. Some have a proper name and the
UGC or other reference in the OTHER column.
6) All Quasars start with a 3C designation for the 3rd Cambridge Catalog.
7) All Galaxy Clusters start with an Abell designation.
8) Open clusters that are non-NGC objects have several common and lots of
uncommon designations. Many are Collinder (Cr), Stock, Melotte (Mel) or
Trumpler (Tr) objects.
9) Dark Nebulae have had several designation systems over the years.
Barnard (B) numbers are used first and are cross referenced to Lynds (LDN)
numbers.
Obviously, if you do find the object you are looking to find, try both the
NAME and OTHER columns before giving up. If you know the constellation,
sort by constellation and just look in that area. This a problem if the
constellation is Virgo, Ursa Major or Cygnus.
CONTRIBUTORS
A. J. Crayon and Dan Ward did error correction and wrote the install and
observing list programs included with this disk set.
Bill Anderson provided the precessed coordinates for many objects. He used the
program from Astronomy magazine, Aug. 84, pp 74-77.
Jeffrey Weintraub entered much of the data from Sky Catalog Vol 2.
Brian Skiff provided us with error checking data and taught us how to use a
variety of sources to do this project with as few errors as possible.
Jim Lucyk provided a wealth of data on objects included on the Uranometria
2000.0 charts and his cross reference index is the basis of much of the info
on references to books and magazines.
Alister Ling provided information on planetary nebulae and did error checking.
Gene Lucas provided data for error checking.
Steve Stanford wrote the program which determined the Tirion and U2000 chart
numbers.
Dr. Harold Corwin was nice enough to allow us to use his list of errors in the
NGC. Otherwise, we would have carried forth several errors that have not been
corrected for 100 years.
Dr. Jack Marling and Steve Gottlieb provided much data on planetary nebulae
from a wide variety of professional sources.
Steve Coe wrote the file you are reading and checked and entered data for the
Non NGC objects.
Paul Maxson checked and entered data for NGC 1 to 1000.
Alan Gore checked and entered data for NGC 1001 to 2000.
Dean Corn checked and entered data for NGC 2001 to 3000.
Bob Dahl checked and entered data for NGC 3001 to 4000.
Paul Dickson checked and entered data for NGC 4001 to 5000.
Mike Willmoth, Jean Goddin and Mike Janes checked and entered data for NGC
5001 to 6000.
Jim Knott checked and entered data for NGC 6001 to 7000.
John and Tom McGrath checked and entered data for NGC 7001 to 7840.
FINAL NOTES
We realize that such an undertaking could not possibly be completed
without some errors or typos creeping into the database. We would like
you to get in contact with us if you find any of three types of problems.
One, just plain errors, either typos or problems we did not know about.
Two, places in the database where we have no data in that field and you
know what should go there. Three, ideas on how better to arrange the
data or programs you have written to manipulate the data. It is hoped that
over a period of time we can hunt down mistakes and make the database as
error free as possible. Thank you for any help you can render in
attaining that goal.
Steve Coe
5942 W. Loma Lane
Glendale, Az. 85302
Ph. (602) 939-3787
A. J. Crayon
13819 N. 37th Ave.
Phoenix, Az. 85023
Ph. (602) 938-3277