The number denotes magnitude,--estimated from the negative.
vS very small, <30´´ S small, 30´´ to 2´ or 3´ L large, >2´ or 3´ B bright D double E elongated F faint iF irregular figure M middle or in the middle N nucleus R round b brighter bn brighter toward the north side bs brighter toward the south side bp brighter toward the preceding side bf brighter toward the following side bsw brightest toward the south-west bM brighter toward the middle dif diffused diffic difficult eF extremely faint g gradually i irregular l little m much p pretty pB pretty bright pF pretty faint sc scattered stell stellar sbM suddenly brighter toward the middle v very vbM very much brighter toward the middle vS very small F_{ *}inv faint star involved [circle] planetary
POSITIONS OF KNOWN NEBULÆ DETERMINED FROM THE CROSSLEY NEGATIVES.
+----------------------------------------------------------------------+ |N.G.C. |[Greek: a]|Precession|[Greek: d]|Precession| Remarks. | | | 1900.0 | | 1900.0 | | | |----------------------------------------------------------------------| | | h m s | s | ° ´ ´´ | ´´ | | | 185 | 0 33 27.9| +3.2866 |+47 47 8 | +19.840 | | | 247 | 0 42 11.0| 2.9770 |-21 18 21 | 19.708 | | | 253 | 0 42 38.6| 2.9526 |-25 50 4 | 19.701 | | | 509 | 1 18 9.6| 3.1429 |+ 8 54 40 | 18.894 | | | 516 | 1 18 53.2| 3.1444 |+ 9 1 46 | 18.876 | | | 518 | 1 19 3.0| 3.1428 |+ 8 48 32 | 18.871 | | | 522 | 1 19 30.6| 3.1486 |+ 9 28 19 | 18.857 | | | 524 | 1 19 33.0| 3.1414 |+ 9 1 2 | 18.856 | | | 525 | 1 19 37.9| 3.1464 |+ 9 10 54 | 18.854 | | | 532 | 1 20 2.5| 3.1430 |+ 8 44 35 | 18.841 | | | ... | 1 21 7.3| 3.1493 |+ 9 23 21 | 18.810 |N. G. C. Sup. 114 | | 628 | 1 31 24.8| 3.2141 |+15 16 22 | 18.473 | | | 891 | 2 16 17.7| 3.7447 |+41 53 44 | 16.609 | | | 906 | 2 18 59.5| 3.7502 |+41 38 10 | 16.476 | | |1023 | 2 34 8.1| 3.7387 |+38 37 42 | 15.681 | | |1055 | 2 36 37.5| 3.0739 |+ 0 0 48 | 15.545 | | |1068 | 2 37 33.7| 3.0658 |- 0 26 23 | 15.493 | | |1072 | 2 38 23.7| 3.0715 |- 0 7 8 | 15.447 | | |1084 | 2 41 4.5| 2.9513 |- 7 59 56 | 15.300 | | |1638 | 4 36 33.4| 3.0287 |- 2 0 6 | 7.139 | | |1931 | 5 24 48.7| 3.9695 |+34 10 7 | + 3.067 | | |2366 | 7 18 19.3| 6.4249 |+69 24 51 | - 6.718 | | |2371-2 | 7 19 16.4| 3.7891 |+29 41 13 | 6.797 | | |2403 | 7 27 11.7| 5.8367 |+65 49 13 | 7.445 | | |2624 | 8 32 24.2| 3.4566 |+20 4 24 | 12.370 | | |2683 | 8 46 27.6| 3.7417 |+33 47 51 | 13.317 | | |2841 | 9 15 7.8| 4.1755 |+51 24 3 | 15.080 | | |2903, 5| 9 26 30.4| 3.4065 |+21 56 15 | 15.716 |N. G. C. 2903 and | | | | | | | 2905 | |3003 | 9 42 39.1| 3.5786 |+33 53 9 | 16.553 | | |3021 | 9 45 1.0| 3.5735 |+34 1 14 | 16.670 | | |3031 | 9 47 17.9| 5.0430 |+69 32 14 | 16.785 | | |3079 | 9 55 11.4| 4.1050 |+56 9 34 | 17.147 | | |3115 |10 0 15.1| 2.9877 |- 7 14 6 | 17.372 | | |3156 |10 7 30.5| 3.1107 |+ 3 37 29 | 17.680 | | |3166 |10 8 34.9| 3.1143 |+ 3 55 11 | 17.724 | | |3169 |10 9 4.2| 3.1154 |+ 3 57 41 | 17.744 | | |3184 |10 12 17.4| 3.6158 |+41 55 27 | 17.874 | | |3198 |10 13 47.9| 3.6919 |+46 3 3 | 17.933 | | |3222 |10 17 6.5| 3.2879 |+20 23 30 | 18.062 | | |3227 |10 17 59.1| 3.2864 |+20 24 14 | 18.094 | | |3226 |10 18 2.8| 3.2859 |+20 22 13 | 18.097 | | | ... |10 20 55.2| 4.5248 |+68 55 14 | 18.204 |Coddington's Neb. | | | | | | | in _Ursa Major_.| |3556 |11 5 36.8| 3.5420 |+56 13 0 | 19.485 | | |3587 |11 9 0.1| 3.5029 |+55 33 47 | 19.553 | | |3623 |11 13 42.8| 3.1374 |+13 38 23 | 19.639 | | |3627 |11 15 2.2| 3.1352 |+13 32 18 | 19.662 | | |3726 |11 27 55.4| 3.2764 |+47 34 50 | 19.851 | | |4226 |12 11 28.2| 2.9995 |+47 34 53 | 20.024 | | |4231 |12 11 51.1| 2.9956 |+48 0 46 | 20.022 | | |4232 |12 11 51.2| 2.9957 |+47 59 39 | 20.022 | | |4244 |12 12 29.4| 3.0148 |+38 24 34 | 20.017 | | |4248 |12 12 53.1| 2.9890 |+47 57 52 | 20.016 | | |4254 |12 13 45.0| 3.0509 |+14 58 19 | 20.011 | | |4258 |12 14 0.8| 2.9821 |+47 51 35 | 20.010 | | |4292 |12 16 10.3| 3.0639 |+ 5 9 1 | 19.997 | | |4303 |12 16 48.7| 3.0637 |+ 5 1 42 | 19.993 | | |4321 |12 17 51.0| 3.0418 |+16 22 36 | 19.986 | | |4379 |12 20 11.2| 3.0382 |+16 9 43 | 19.970 | | |4382 |12 20 21.3| 3.0321 |+18 44 45 | 19.968 | | |4394 |12 20 53.0| 3.0310 |+18 46 7 | 19.964 | | |4501 |12 26 56.6| 3.0304 |+14 58 21 | 19.909 | | |4516 |12 28 5.1| 3.0282 |+15 7 38 | 19.898 | | |4527 |12 29 2.2| 3.0629 |+ 3 12 19 | 19.886 | | |4533 |12 29 15.6| 3.0638 |+ 2 52 39 | 19.884 | | |4536 |12 29 20.6| 3.0642 |+ 2 44 22 | 19.883 | | |4565 |12 31 23.3| 2.9812 |+26 32 20 | 19.859 | | |4627 |12 37 7.3| 2.9316 |+33 7 22 | 19.784 | | |4631 |12 37 14.4| +2.9315 |+33 5 19 | -19.783 | | |----------------------------------------------------------------------|