Maffei Galaxies
Galaxies Maffei I and Maffei II in Cassiopeia
Galaxies Maffei I and Maffei II in Cassiopeia
Here is a view of two very dim galaxies hidden to the side of the Heart and Soul Nebula. They are called Maffei I and Maffei II. They were discovered by the Italian Astrophysicist Paolo Maffei in 1967 using infrared emissions. Both are hidden by the dust and gas of our Milky Way galaxy, I was pleasantly surprised to spot these two little blurs using the Williams Optics REDCAT51 scope. The yellow box shows where I zoomed in to show the galaxies on the bottom right view.
If it was not obscured by the Milky Way, Maffei I would be one of the largest and brightest galaxies in our sky, covering an area ¾ the size of the moon! Amazing!
Tech Specs: Williams Optics Redcat 51 APO, Celestron CGEM-DX mount (pier mounted), ZWO ASI071MC-Pro, Optolong L-eNhance 2” filter, 60 x 60 second exposures at a GAIN of 200, one hour total exposure with dark/bias frames, guided using a ZWO ASI290MC and Orion 60mm guide scope. Captured using Sequence Generator Pro (SGP) v3.03. Image date: November 25, 2019. Location: The Dark Side Observatory, Weatherly, PA, USA.
If it was not obscured by the Milky Way, Maffei I would be one of the largest and brightest galaxies in our sky, covering an area ¾ the size of the moon! Amazing!
Tech Specs: Williams Optics Redcat 51 APO, Celestron CGEM-DX mount (pier mounted), ZWO ASI071MC-Pro, Optolong L-eNhance 2” filter, 60 x 60 second exposures at a GAIN of 200, one hour total exposure with dark/bias frames, guided using a ZWO ASI290MC and Orion 60mm guide scope. Captured using Sequence Generator Pro (SGP) v3.03. Image date: November 25, 2019. Location: The Dark Side Observatory, Weatherly, PA, USA.
Thanks to http://www.atlasoftheuniverse.com/galgrps/maffei.html for the information listed below.
This is a list of the main galaxies in the Maffei group. A lot of the diameters of these galaxies are only rough estimates because most of these galaxies are very obscured. The dominant galaxies in this group are IC 342, Maffei I and Maffei II.
1 2 3 4 5 6 7 8 9
Name Equatorial Blue Type Size Size RV Other
Coordinates Mag (') kly km/s Names
RA Dec
Cas 3 01 07.5 +51 26 17.1 Irr 1 5 -166 KKH5
KKH6 01 34.9 +52 06 17.0 Irr 1 5 -141
Cas 1 02 06.1 +69 01 16.4 Irr 5.5 10 -95 KK19
Perseus 1 02 24.6 +56 01 16.2 Irr 2.2 5 -93 KKH11
Perseus 2 02 27.4 +57 29 17.8 Irr 3.4 10 -90 KKH12
UGC 2773 02 32.1 +47 48 14.3 Irr 1.2 5 +83 KK28
MB 1 02 35.6 +59 23 19.5 Irr 1.9 5 +39 KK21
Maffei 1 02 36.6 +59 39 14.4 E 18.2 55 -138 UGCA 34
MB 2 02 37.0 +59 14 ? Irr? ? ? ?
Maffei 2 02 41.9 +59 36 16.0 SBbc 21.4 60 -134 UGCA 39
Dwingeloo 2 02 54.1 +59 00 20.5 Irr 5.4 20 -47
MB 3 02 55.7 +58 52 19.8 E 3.9 10 -43 KK22
Dwingeloo 1 02 56.9 +58 55 17.7 SBcd 8.0 35 -28 Cas 2
KK35 03 45.2 +67 52 ? Irr ? ? +32
IC 342 03 46.8 +68 06 9.2 Sc 36.3 75 -62
UGCA 86 03 59.8 +67 08 14.2 Sm 10.2 20 -12
Cam A 04 25.3 +72 48 14.9 E 3.1 10 -192 KK41
NGC 1569 04 30.8 +64 51 11.7 Irr 5.8 10 -153
NGC 1560 04 32.8 +71 53 12.1 Scd 11.5 35 -94
UGCA 92 04 32.1 +63 37 16.1 Irr 4.4 10 -164
Cam B 04 53.1 +67 06 16.7 Irr 2.6 5 +27 KK44
UGCA 105 05 14.2 +62 35 13.2 Sm 7.4 20 +76
Cam D 05 59.7 +73 26 17.1 Irr 1 5 +93 KKH34
Mailyan 16 06 47.8 +80 07 16.4 Irr 1 5 -157 KKH37
Column 1: The usual name of the galaxy.
Column 2: The Right Ascension for epoch 2000.
Column 3: The Declination for epoch 2000.
Column 4: The blue apparent magnitude of the galaxy.
Column 5: The galaxy type: E=Elliptical, S0=Lenticular, Sa,Sb,Sc,Sd=Spiral,
SBa,SBb,SBc,SBd=Barred Spiral, Sm,SBm,Irr=Irregular.
Column 6: The angular diameter of the galaxy (arcminutes).
Column 7: The diameter of the galaxy (thousands of light years).
Column 8: The recessional velocity (km/s) of the galaxy relative to
the cosmic microwave background.
Column 9: Other names of the galaxy.
References:
Huchtmeier W, Westpfahl D, Karachentsev I, Karachentseva V, (2001), The IC342/Maffei
Group of Galaxies. Gas and Galaxy Evolution ASP Conf Ser 240, 589.
Buta R, McCall M, (1999), The IC342/Maffei Group Revealed. Astrophys J Supp, 124, 33.
Karachentsev I, Makarov D, Huchtmeier W, (1999) HI properties of nearby galaxies
from a volume-limited sample. Astron Astrophys Suppl, 139, 97.
Schmidt K, Priebe A, Boller T, (1993), Nearby Galaxies. Astron Nachr, 314, 371.
The HyperLeda Database
, (2003).