This hub has worked out well for me in the cold. Not using Stellarmate, but am using a Raspberry Pi as the full system.
StarTech.com 4 Port USB 3.0 Hub - 3 Dedicated USB Charging Ports

Any of the startech Hubs work well, as do Anker ones.. also I have used an Orico one too...

This Orico 4 ports works very well.

www.orico.cc/us/product/detail/574.html

But I got another 7 ports Orico USB3.0 hub which having issue with Raspberry pi.

www.amazon.com/ORICO-H7988-U3-BK-Compact...dapter/dp/B00A525AJO

I have had similar issues with the same hub. If I want Ekos to see the mount or the GPS USB dongle, I have to plug them into the Pi, not the hub. I haven't tried a USB 2.0 connecting cable, I've no reason to believe that would solve the problem but I'm gonna give it a whack. Important distinction about this particular Anker hub is that it runs off 12V, so you can cut the cable off its wall-wart and wire it into your battery system.

Sabrent 60W 7 port USB3 hub works well.

I also use Sabrent 7 Port USB 3.0 hub.
No complaints.
www.amazon.com/dp/B00SIQIV04
I also power my RPI from one of it's charging ports.

I use the ORICO HF9US-2P-BK 9 Port USB Hub that has an extra 2 dedicated powered USB ports. One to power the pi. It all works flawlessly.

BTW the Belkin hub I use does NOT power the Pi from its dedicated charging port. No idea why.

I'll second this one here.... www.amazon.com/Anker-Ultra-Slim-Portable...tebook/dp/B0192LPK5M

I use an ioptron ieq45 pro, Moonlite focuser, StellarMate and two ASI cameras.

Anyone using an
APANAGE 8 Port Powered USB 3.0 Hub Splitter, 4 Port USB Data Hub + 4 Smart 2.4A Charging Ports USB Hub, 12V/4A Power Adapter ? Price looks good ($Cdn)

www.amazon.ca/APANAGE-Powered-Splitter-C...dapter/dp/B07H19K7H3

[EDIT: I now have this, and find it works well powering the RPi3B+ and at the same time my Nikon Z7 using a Case Relay. ]

I suspect most if not all 7 port hubs are not actually true 7 port but rather contain two 4 port bridge IC's, the second daisy chained the the primary. For this reason I choose to use 2 x 4 port hubs. Perhaps not so important with the Pi since all 4 USB sockets and the ethernet socket share a common bus but on more capable hardware it can be an advantage. Avoid hubs which use micro or mini USB sockets for power input . These sockets are less robust than simpler barrel jacks.

I have been using a 2.0 USB Powered 4 Ports Switch HUB Adapter For Desktop PC Laptop Compatiblegeneric USB 2.0 hub (as the Pi 3 only supports USB 2.0) - £3.40.

It has been working well for peripheral support (EQMOD mount and usb focuser). Haven't tried it with the camera. Powered it from the 12-5VDC step down converter that is powering the Pi.

Note: After confirming it worked OK and mounting it next to the Pi, I attacked it with a soldering iron to remove the very bright blue LEDs.
(unable to enter the link in post above, here is the link to the item I purchased in UK: look for "2.0 USB Powered 4 Ports Switch HUB Adapter For Desktop PC Laptop Compatible")