On Tue, 23 Oct 2018 22:16:41 -0600, Chris L Peterson
wrote:
On Tue, 23 Oct 2018 10:22:30 -0700 (PDT), walter lebowitz jr
wrote:

Are there any Twitter or other social media accounts worth
following for one interested in: 1) rapid notification of new comet
discoveries or outbursts of known objects; 2) rapid notification of
new Earth-approaching minor planet discoveries; 3) rapid notification
of new extragalactic supernovae discoveries; 4) news pertaining to
forthcoming meteor showers?

For 1) above, I previously used the website of the Central Bureau
for Astronomical Telegrams, but it seems that many of that website's
pages are no longer updated with any regularity. For 2) I sometimes
check the Minor Planet Center's Near-Earth Object Confirmation page
but it would be preferable to have the 25-30th magnitude objects
filtered out. For 4) I previously referred to the meteorobs mailing
list archives website, but that site seems to have suffered an
untimely demise a couple of years ago.

I am interested in intermediate to advanced amateur-level
information (something beyond which Astronomy Magazine of Sky &
Telescope would provide).

Thanks, Walter Lebowitz Jr

http://www.astronomerstelegram.org/ which also has Twitter and FB
hooks.

CBAT remains the standard active source for most reports, but much
of
its content is only available via subscription.

Another organisation, based in the UK, is:

http://www.theastronomer.org/subscription.html