The best Selenium planet in the Galaxy!

Well, best in the galaxy as known by the Spansh database, and heavily weighted by proximity to Sol. There are suspiciously amazing planets with 12+ selenium ratios, but they are out in the black.

Synuefai ZH-D c28-0 4 c

Quick shot: Go there, get all the seleniums.

Strengths:
25 sites (at least 3 easy driving)
483 LY from Sol / Distance to Arrival 2666 LS
Volcanism/Geological sites
Selenium: 5.779119%
Other "Common" Mats:
Chromium 1.147628%
Zirconium: 0.296316%
Selenium to other so-called common material ratio: 4.0. Given that this seems to determine how often Selenium drops when Crystalline Fragments are destroyed, this is huge. My limited testing (3 sites) had me at 30/11 selenium/other, somewhat worse than expected, but small data set.

Weaknesses:
0.03 gravity. Selenium just kinda floats down to you on it's own schedule. But the driving is fairly easy: just rocky, but no terrain to speak of at sites 23, 25, and 17. Site 10 looked dicey, so I avoided. Have not tested other sites yet.
483 LY from Sol. If you're still working on that engineered FSD + booster, this might be a stopper. I guess.

Bonus: Right next door to Synuefai ZH-D c28-0 4 b with a similar 5.77% Selenium and a 4.19 ratio. 0.4 gravity is a plus, but there are only 16 sites and they are more to much more challenging to drive. I did manage to get a selenium to common return ratio of 71/1 though, so there is that. Planet 4 d also has a ratio of 2.63, which (while untested) is still better than the previous best known, close to Sol sources.

Thanks to Spansh for continuing to provide a full galaxy data dump (168G uncompressed JSON).

Thanks to CMDR VicTic for his excellent explanations of how raw mats and Selenium work in the game, and his Selenium Finder tool.
 
I've already got pretty much all the selenium I can carry. Now if you find a similar planet for arsenic, I may be interested.
I'd go to a raw trader, trade down all of my Polonium, hop in my trusty (and cheap to rebuy) DBX, go to HIP 36601 - C 1 a , land on a (crystal shard) biological site,
collect Polonium till I'm full, blow up (reappearing at the mat trader), trade down, possibly repeat the Polonium collect. Takes about an hour if I remember correctly. Maybe 2.
 
Seems like a lot of effort for selenium...interesting though.

Honestly I find the %’s in the system map lie half the time anyway. Often I’ll land on a low selenium planet looking for antimony or something else and selenium will be dropping from every rock I shoot...
I've never had selenium (or any other mat) drop unless it's in the planet's material list on the system screen. As for the odds for any one mat dropping, yeah, the RNG can make it tricky, and I don't know if the percentages as listed are guaranteed. That's why I usually go to the crystal shard sites and trade down...but there is no shard site for Selenium. The sites are faster, even with the travel time, and only drop one type of high end mat.
 
A lot depends on how many materials of the same grade appear on the body. If there were no G2 materials there then all the Crystalline Fragments would drop Selenium*.

* Because in this case Selenium is treated as a G2.

Unless things have changed, there are always* three common mats, so the trick is to find a planet with high ratio.

* Well, possibly not --always--. There were a few planets that popped up during my search that listed having 3 or more 'common' G2 drop mats, but they're all quite a ways off, and may be bad data.
 
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Yep, a lotta effort for a G2 mat that's common as dirt.

I haven't found it to be that common, although any one experience will vary. It is possible that things changed after an update; also I think it can show up when mining icy rings.

This isn't realy a G2 mat; it's just G2 in the drop. It trades as a G4, so with two trips or so, you can max the category 4 raw mats. For me, constantly running out of Tin and selenium drove me to fill to the gills. The other mat categories all have crystal shard sites for their (trading) grade 4 mat. This seems more efficient, especially for a particularly useful mat.
 
I haven't found it to be that common, although any one experience will vary. It is possible that things changed after an update; also I think it can show up when mining icy rings.

This isn't realy a G2 mat; it's just G2 in the drop. It trades as a G4, so with two trips or so, you can max the category 4 raw mats. For me, constantly running out of Tin and selenium drove me to fill to the gills. The other mat categories all have crystal shard sites for their (trading) grade 4 mat. This seems more efficient, especially for a particularly useful mat.
It drops as a G2 - that's common. It's like saying Manganese is hard to get, that's easy too.
 
I find Sn hard to find, but mats trader is just cheating in a totally legit way.

You should have been around at the beginning...
 
I've already got pretty much all the selenium I can carry. Now if you find a similar planet for arsenic, I may be interested.

Basically any planet with geo / bio features & arsenic present will work, blast everything in sight and get hoovering it up.

rinse repeat and you'll have pockets full of the stuff.
 
Basically any planet with geo / bio features & arsenic present will work, blast everything in sight and get hoovering it up.

rinse repeat and you'll have pockets full of the stuff.

That's not been my experience. The highest percentange of arsenic I've found while out exploring lately is 2.8% and when I hit the geological sites they may drop it in 1 of 3 tries. I've been averaging about 6-10 arsenic per geo site. My selenium OTOH is full.

I may just have to go the polonium and trade route.
 
Yep, a lotta effort for a G2 mat that's common as dirt.


If it was "as common as dirt", there wouldn't be threads like this, now would it?

As I write this, I'm at Outotz BB-V c16-0 ABC 2ba looking for selenium. Found the planet using Spansh.

Both in-game and EDDB.io stats say Selenium 4.7%, highest above all others except common G1 mats.

After three geo-signals visited, I still haven't found a single drop of selenium. Not one.

Everything else is dropping like mangoes in the Caribbean, even the really low % ones. Not selenium.

And it's not the only planet in the sector I've prospected today. I've been at it all day and I'm still at 25/150.

So, no, it's not common at all.
 
There are threads like that because people read what's already around instead of discovering stuff themselves. I have a full load of Selenium right now, if I ever spent it all I'm 100% confident I could refill it in an hour, probably while actually looking for another mat. It's the same with Arsenic, everyone is sure it's impossible to find yet I never had any issues (tho to be fair anyone looking for As when polonium can be traded now is wasting time). And yet I still pick up plenty when I'm looking for other stuff. 🤷‍♂️
 
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