>...галактику в Водолее NGC7600 (11.9m)...
На самом деле 12.9
Согласно последней редакции NGC для этой галактики:
B Magnitude: 12.9
V Magnitude: 11.9
при визуальных наблюдениях ориентируемся на последнее число (визуальная зв. величина), при фотографических (ч/б) - на первое (зв. вел. в голубых лучах).
Да, действительно.
7600 * 1 1 AQR 23 18 53.8 -07 34 48 12.9 11.9 13.0 2.50 1.0 70 E-S0 71029 MCG -1-59-19
(NGC C D X S P CON Rect (2000) Decl Bmag Vmag SB a b PA Type PGC ID1 ID2 ID3 Remarks )
Я ориентировался на цифры, которые предлагал планетарий Guide-8.
Comments from the NGC-IC Project:
Galaxy
Type: E-S0
RA: 23 18 53.8 (J2000)
declination: -07 34 50
Magnitude: 12.9
Major axis: 3.10 arcminutes
Minor axis: 1.6
Position angle: 64
Constellation: AQR
PGC 71029
Alternative designations:
MCG -1-59-19
Right ascension: 23h18m53.8s
Declination: -07 34' 50"
ЃхьрЕъш шч ър?рыюур NGC2000 :
J2000 RA: 23h18.9m
J2000 dec: -07 35'
cF, S, R, psmbM
NGC 7600: considerably faint, small in angular size, round,
pretty suddenly much brighter middle
Comments from Steve Coe's observations:
NGC 7600 Faint, pretty small, somewhat elongated and has a bright
middle. It is not much at 100X.
Comments from SAC (Saguaro Astronomy Club) 7.2 database:
NGC 7600
MCG - 1-59- 19
Object type: GALXY
Constellation: AQR
RA: 23 18.9 (J2000)
declination: -07 35
Size: 3.1 x 1.6
Position angle: 111
Classification: E-SO
cF,S,R,psmbM
H II 431
Right ascension: 23h18m54.43s
Declination: -07 34' 47.5"
Remarks from the PGC (Principal Galaxy Catalog):
PGC 0071029
NGC 7600
Coordinates have been determined to be accurate
Galactic longitude: 70.380
Galactic latitude: -60.625
Supergalactic longitude: 281.825
Supergalactic latitude: 20.660
Position angle: 111.000 degrees
Total B
magnitude: 13.027 е 0.234
Heliocentric galaxy RV from optical observations: 3470.650 е 89.842 km/s
Galaxy RV relative to the Local Group: 3626.875 km/second
Galaxy RV relative to the GSR: 3573.227 km/second
Galaxy RV corrected for Virgo infall: 3465.927 km/second
Galaxy RV relative to the 3K background: 3120.534 km/sec
Ѓръе. юе?: 2.489е0.751 ?уы.ьшэ.
-Е. эрчтрэш :
NGC 7600 MCG -1-59- 19
ЃЕшьх?. шч RC3 (Third Reference Catalog):
J2000 RA: 231853.9
J2000 dec: -07 34 50
Galactic longitude: 70.38
Galactic latitude: -60.62
Supergalactic longitude: 281.83
Supergalactic latitude: 20.66
First cross-reference: NGC 7600
Second cross-reference: MCG -1-59- 19
PGC 71029
Type: .L..-./
Hubble stage: -3.0 +/- .4
Position angle: 70 degrees
Total B
magnitude: 12.91 +/- .13
Photographic
magnitude: 12.89 +/- .19
Galaxy RV from optical observations: 3504 е 35 km/sec
Mean galaxy RV corrected to GSR: 3607 km/s
Mean galaxy RV corrected to 3K background: 3154 km/s
Comments from the MCG (Morphological Catalog of Galaxies):
Total
magnitude: 13.0
Magnitude is accurate to е.1 mag
Major axis, inner part: 1.10 arcminutes
Minor axis, inner part: 0.50 arcminutes
Surface brightness (1=brightest, 6=dimmest): 1
Right ascension: 23h18m53.s
Declination: -07 35' 34"
NGC 7600
Таким образом, без оглядки на спектральную характеристику объекта недалеко до ошибки. Но почему тогда в описании объектов в планетарии используется именно фотографическая величина? Или это только характерно для указанной программы?
