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Maffei Galaxy Group


Maffei Galaxy Group is one of the closest galaxy groups to our Local Group.
This group is notable because it has one large spiral galaxy Maffei 2, one medium spiral galaxy NGC1560, one irregular galaxy Camelopardalis A, and an isolated pair of dwarf galaxies NGC 1569 and UGCA 92; these five have a rare blue shift.

Blue shifts are a problem for cosmologists:
'
An analysis of the velocities and distances to the IC 342/Maffei Group as measured by [several] suggested that IC 342 and Maffei 1 were moving faster than what could be accounted for in the expansion of the universe.
'

Perhaps this is useless trivia but some might find it interesting and worthwhile.
Without details we don't even know they are there.

On 3/29 I posted data for our Local Group. At the time the references I found indicated all blue shift objects are in our Local Group; that is not true after finding other references. Most are around the Andromeda galaxy.That post has the list of objects in our Local Group along with their spectral shift, celestial position difference in relation to M31, and distance from Earth.

Vr is the relative velocity; D2 is the distance to the object in Mpc.

Wikipedia has a page "IC342/Maffei Group"

For reference, some notable objects in our Local Group:

M31 Andromeda  A0h D0d Vr=-301  D2= 0.76 B  
SMC a0h d-113d  Vr=+148 D2= 0.06   R
M33   A+1h D-11d  Vr=-181  D2= 0.79     B
LMC   A+5h D-110d  Vr=+275  D2= 0.05  R

Here is that type of data for the IC342 subgroup in Maffei Galaxy Group. Some distances are missing; different wikipedia pages have different distances.

Camelopardalis A  A+4h D+31d Vr = -46 D? B

Camelopardalis B  A+4h D+26d Vr = +77 D? R

Cassiopeia 1  A+2h D+27d Vr=+35 D? R

IC 342  A+3h D+27d Vr=+31 D2=3.3     R

KK 35  A+3h D+46d Vr=+105  D?   R

NGC 1560 A+4h D+30d Vr= -36 D2=3.1 or 3.5 B

NGC 1569  A+4h D+23d Vr=-104 D2=3.4      B

UGCA 86 A+4h D+26d Vr= +67  D2=2.6      R

UGCA 92A+4h D+22d Vr=-99  D?      B

UGCA 105  A+5h D+21d Vr= +111 D?    R

Here is that type of data for the Maffei subgroup in the Maffei Galaxy Group.

Dwingeloo 1  A+2h D+27d Vr=+110 D2=3.0   R
Dwingeloo 2 A+3h D+18d Vr=+94 D2=3.0    R
KKH 11A+2h D+15d Vr=+310  D?R
KKH 12A+2h D0dVr=+70D?R
Maffei 1A+2h D0dVr=+13 D2=2.9 or 4.4 R
Maffei 2A0+3h D0d Vr=-17 D2=32.0B
MB 1A+2h D0dVr=+190D?R
MB 3A+3h D0dVr=+59 D2=3.0R

R=redshift; B=blueshift

NGC 1569  is very close to UGCA 92 in celestial positions with a difference in RA of only 0h4m and in dec of 1d4'  with nearly identical blue shifts.

Maffei 1 is very close to Maffei 2 in celectial positions with a difference in RA of only 0h5m and in dec of 0d3'  but they are moving in opposite directions and have very different distances.
Maffei 1 is a giant elliptical
(perhaps the closest of this type); if not obscured it is 3/4 the full moon.
Maffei 2 is an intermediate spiral, also obscured.
Maffei 2 is one of the very rare blue shift objects in the universe.

I always find incredible all of the blue shift objects are only in our vicinity, either in our local group or the nearby Maffei group, while all other galaxies in the entire universe have red shifts.
Wherever I can find relative velocity values this holds true.



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