Depending on which galaxy its measured from, the Hubble constant is
different, even locally negative if it were measured from within the
Great Attractor that could be considered as acting somewhat like a
wormhole or soon to become a ultra mega black hole once a few galaxies
merge.
Locally there are any number of galaxies (including our galaxy)
heading into the GA at the average trek velocity of roughly 700 km/
sec, and of those coming head on to us will likely be making their
final encounter of merging with us at 1500+ km/sec. Of course we’ll
first have to survive getting rear-ended by the Andromeda galaxy
that’s nearby and closing fast. Even a galactic glancing blow could
become highly problematic for billions of solar systems like ours if
only 0.1% of stars and their planet collective get perturbed or
otherwise contributed to.
According to the latest interpretations of our supposedly forever
expanding universe, the expansion rate from our perspective is roughly
74.3 km/sec/3e6 ly, or 2.477e-2 m/sec/ly. Unfortunately this
migration or cosmic molecular outsourcing to places ever farther away,
and of galaxies going every which way at the same time (including
those colliding and of mergers) makes everything a whole lot more
complicated and dependent on each galaxy doing its own local thing
while this expansion or big ongoing flow is taking place.
In other words, most anything past 12.1e9 ly from us is going to
become invisible to us, because we’re moving faster than ‘c’ away from
it, and the propagation or FIFO handoff of those distant photons will
never again reach us unless something has slowed down or having sort
of been dragging its feet. Otherwise, older galaxies are also
becoming redder due to the fusion process that all main-sequence stars
must endure as they age, not to mention the greater populations of
those forever lasting red and brown dwarfs that seem to exist in the
vast majority. A brown dwarf can also gain mass of helium, hydrogen
and other elements as those are made available, thus further
sustaining themselves.
However, with perhaps at least 5e55 kg and possibly 5e56 kg worth of
cosmic mass (including its dark/clear aether), there should be
sufficient gravity to have slowed and even as having reversed this
rate of expansion, unless there’s an ongoing aether dark/clear flow or
some kind of excess diamagnetic helium or the collective photon
displacement to contend with.