Note on Type: the field is coded as follows:

     Gx    Galaxy

     OC    Open star cluster

     Gb    Globular star cluster, usually in the Milky Way Galaxy

     Nb    Bright emission or reflection nebula

     Pl    Planetary nebula

     C+N   Cluster associated with nebulosity

     Ast   Asterism or group of a few stars

     Kt    Knot  or  nebulous  region  in  an  external galaxy

     ***   Triple star

     D*    Double star

     *     Single star

     ?     Uncertain type or may not exist

     blank Unidentified at the place given, or type unknown

     -     Object called nonexistent in the RNGC (Sulentic and Tifft 1973)

     PD    Photographic plate defect

Note on Desc: description of the object, as given by Dreyer or

     corrected by him, in a coded or abbreviated form. The abbreviations

     and their combination are fully described in the introduction

     to the published catalog.

     ab       about

     alm      almost

     am       among

     annul    annular or ring nebula

     att      attached

     b        brighter

     bet      between

     biN      binuclear

     bn       brightest to n side

     bs       brightest to s side

     bp       brightest to p side

     bf       brightest to f side

     B        bright

     c        considerably

     chev     chevelure

     co       coarse, coarsely

     com      cometic (cometary form)

     comp     companion

     conn     connected

     cont     in contact

     C        compressed

     Cl       cluster

     d        diameter

     def      defined

     dif      diffused

     diffic   difficult

     dist     distance, or distant

     D        double

     e        extremely, excessively

     ee       most extremely

     er       easily resolvable

     exc      excentric

     E        extended

     f        following (eastward)

     F        faint

     g        gradually

     glob.    globular

     gr       group

     i        irregular

     iF       irregular figure

     inv      involved, involving

     l        little (adv.); long (adj.)

     L        large

     m        much

     m        magnitude

     M        middle, or in the middle

     n        north

     neb      nebula

     nebs     nebulous

     neby     nebulosity

     nf       north following

     np       north preceding

     ns       north-south

     nr       near

     N        nucleus, or to a nucleus

     p        preceding (westward)

     pf       preceding-following

     p        pretty (adv., before F. B. L, S)

     pg       pretty gradually

     pm       pretty much

     ps       pretty suddenly

     plan     planetary nebula (same as PN)

     prob     probably

     P        poor (sparse) in stars

     PN       planetary nebula

     r        resolvable (mottled, not resolved)

     rr       partially resolved, some stars seen

     rrr      well resolved, clearly consisting of stars

     R        round

     RR       exactly round

     Ri       rich in stars

     s        suddenly (abruptly)

     s        south

     sf       south following

     sp       south preceding

     sc       scattered

     sev      several

     st       stars (pl.)

     st 9...  stars of 9th magnitude and fainter

     st 9..13 stars of mag. 9 to 13

     stell    stellar, pointlike

     susp     suspected

     S        small in angular size

     S*       small (faint) star

     trap     trapezium

     triangle triangle, forms a triangle with

     triN     trinuclear

     v        very

     vv       _very_

     var      variable

     *        a single star

     *10      a star of 10th magnitude

     *7-8     star of mag. 7 or 8

     **       double star (same as D*)

     ***      triple star

     !        remarkable

     !!       very much so

     !!!      a magnificent or otherwise interesting object