RV Sonnenkreis - Decoding Universal Cartographics
- Thread starter Jackie Silver
- Start date
In the spectral classification system : V indicates the Luminosity class, and also defines if a star is in the main sequence (V), dwarves (VI), subdwarves (VII), or else, giants (IV), supergiants (III and II), or hypergiants (I and 0/Ia*). As for the last letter, this is the luminosity subclass, and in your example, "Z" indicates an unusually strong ionised helium line at 468.6 nm in the star's spectrum hinting, at an extremely young star. "Z" also stands for "Zero-Age". Other luminosity subclasses can be A, AB and B as well
So I found an untagged hypergiant the other day. I can't tell if it is listed as BB IA0 or B8 IA0, which one makes more sense?
it also had a AEBE1 VI and a OO VZ, pretty amazing system actually!!
B8 IAO; or Ia-0, it would probably be written for a "real" spectrum. B for the broad spectral class; 8 for the subdivision within that class (meaning in this case that it's a B star, but it's one of the cooler B stars); and IAO meaning it's a stupidly luminous supergiant or hypergiant. AIUI no one has really fixed the terminology for classifying hypergiants anyway...
B8 IAO; or Ia-0, it would probably be written for a "real" spectrum. B for the broad spectral class; 8 for the subdivision within that class (meaning in this case that it's a B star, but it's one of the cooler B stars); and IAO meaning it's a stupidly luminous supergiant or hypergiant. AIUI no one has really fixed the terminology for classifying hypergiants anyway...
Yeah, I was pretty sure it was B8, but sometimes it is hard to tell. I did not think BB was a thing, but as much as I love astronomy, I learn new things every day. I knew you would know the answer.
I assumed because it was IA-0, that means it is a hypergiant. I wish they listed actual individual stellar luminosity as a stat on each star, but I think maybe that would be hard for them to do. On the galactic map, this star is listed as a blue supergiant but in the system map it is labeled as a Class A blue-white supergiant, weird. I wonder which one it is, maybe it's both.
91.65 solar masses, 454.88 solar radius, surface temp is 13,848K, It is a beautiful star. I should probably name it Thanks Matt, I've been using the realistic mode for the past week or so and are definitely visible from a long way away, giants are quite obviously bigger than main sequence stars and others have tell-tale signs, like TTSes seem to have more rays coming from them. I'll keep trying to use this for the rest of my journey.
Invaluable thread!
Has anyone figured out the rhyme or reason for the missing numbers in the sequences? For instance BA-A G1, G2, but no G3-G27, then there is a G28,G29,G30,G31, then missing G32-G38, etc?
It's just occurred to me: all the permit-locked sectors are all non-procedurally-generated. They're spherical, not cubic, and their names don't fit into the standard proc-gen pattern. With names like Bleia5, Hyponia and Sidgoir, they seem to be designed to "blend in" with the procedurally-generated sectors, but they are manually placed like the nebula sectors.
I haven't verified this, but that's a very good spot! I'm pretty sure that Jackie and Alot would have spotted this, but it would be good to know.
As far as I can tell, non-procedural nebula sectors' systems are just renamed, not separately generated. Something like this:
1. Stellar Forge generates a procedural sector, like Traikaae
2. Non-procedural nebula gets placed somewhere inside this sector
3. Existing systems within a certain sub-sector range get renamed to "[nebula] sector"
For a bit of proof, sometimes you can find system names that have duplicates. For example, search for "Little Ghost Sector EL-Y d1-1", and the game will actually take you to "Traikaae NH-L d8-1".
As for the permit locked sectors, that's a good observation. Today they are either based on real clusters, or hand-placed spherical regions - in which case, it's probably overwritten similar to real nebula sectors. It's easy enough to tell which such sectors are hand-placed: their names are actually all caps. Like "BOVOMIT".
The only exception I know of was the Ovomly sector, which used to be locked for a long while with its own permit, but the systems were also bugged. They were fixed, and the permit requirement is gone, although I don't know if the two happened at the same time or not. It was separate from that time when random systems in some sectors were locked with permits they shouldn't have been though. Oh, and I've been to the sector before, but found nothing out of the ordinary there - it has been barely touched then and since though.
Last edited:
*nods* Marx has it there. Plus there's an order of precedence between different hand-authored sector names - at the very lowest precedence you have the expected proc-gen name for a system, but if there is a hand-authored sector that covers it you get the hand-authored name, or if there are multiple hand-authored sectors, you get the one of those which has highest precedence. Sometimes this can lead to the hand-authored sectors only appearing some distance away from the objects that they are based around because another sector takes precedence over them...
There can also be cases where there are two sectors which both refer to the same object, but under different catalogue numbers. I don't have examples to hand (lunch break!) but for instance you might have an object which had one hand-authored sector under its NGC name and one under its Collinder name.
There can also be cases where there are two sectors which both refer to the same object, but under different catalogue numbers. I don't have examples to hand (lunch break!) but for instance you might have an object which had one hand-authored sector under its NGC name and one under its Collinder name.
Last edited:
Right? I had similar thoughts when I first joined too, and have been reading it ever since.
Is there a reason why in procgen sectors apart from AA-A or BA-A most massive stars tend to be EG-Y or FG-Y denominations?
Basically, EG-Y is "one off" from AA-A positionally, in the same way as BA-A is but in a different direction. So for the high mass codes like f/g, you'll tend to see lots of the same repeating parts, because they're the only ones that are valid for that mass code.*
e.g. Valid combinations for g mass code: AA-A, BA-A, YE-A, ZE-A, EG-Y, FG-Y, CL-Y, DL-Y
There are 64 valid combinations for f so I won't list all those, and the number multiplies by 8 for every mass code down from there.
It's basically a generalisation of the "you can only have AA-A for h systems" phenomenon.
* Technically in the hand-authored spheres you can go slightly beyond the normal valid range for fun reasons involving how those spheres get mapped into names.
Last edited:
In the spectral classification system : V indicates the Luminosity class, and also defines if a star is in the main sequence (V), dwarves (VI), subdwarves (VII), or else, giants (IV), supergiants (III and II), or hypergiants (I and 0/Ia*). As for the last letter, this is the luminosity subclass, and in your example, "Z" indicates an unusually strong ionised helium line at 468.6 nm in the star's spectrum hinting, at an extremely young star. "Z" also stands for "Zero-Age". Other luminosity subclasses can be A, AB and B as well
Somewhat late, but your size definitions are very wrong. The correct ones are as follows:
0/Ia:Bright Supergiant
Ib: Supergiant
II: Bright Giant
III: Giant
IV: Subgiant
V: Main Sequence
VI: Subdwarf
VII: White Dwarf
Generally, Main Sequence stars similar in mass to the sun start of as TTS star, then have a long Main Sequence (V) life, then evolve briefly into Subgiants (IV) which then evolve into Red Giants (large M III) and then down to Horizontal Branch Giants (also K or M III, but smaller), then back up to Asymptotic Branch Giants (large M III or M II), then to White Dwarfs (VII). The MS stage is the longest of these, followed by the HB stage. Subgiant, Red Giant and Asymptotic Branch Giants (Mira-types) are relatively brief.
More massive stars will roughly follow the same sequence, but tend to end up as Bright Giants or Supergiants, and often end up exploding as supernovae which produce neutron stars or black holes instead of white dwarfs. They'd start out as Herbig Ae/Be objects.
Subdwarfs (VI) are NOT part of the Main Sequence and appear to be far too common in the game. They have their own parallel "Subdwarf Sequence" alongside the Main Sequence, but are low metallicity stars that formed when the universe was young (and cannot form today as a result) - this means that all the massive subdwarfs have evolved into red giants or white dwarfs by now, and so we should only see Subdwarfs of type F/G to M today.
Last edited:
A quick progress report from me seems in order - I'm on an extended jaunt hunting down tourist destinations which aren't yet fully updated on Lucienn's spreadsheet; also visiting some of the more far-flung catalogue stars, checking out Dynasty sites and the Skaudai ruins and popped in to Jaques a couple of times... it's been a very roundabout trip so far!
Currently headed for OGLE235-MOA53, then "Neutron World", "Black in Green", "Degenerate Trio", V381 Normae, MAXI J1543-564, TrA X-1, the Hawkins Gap bases and (maybe) home after that.
If anyone is looking for fame, fortune and tagging, OGLE-TR-111 and OGLE-TR-132 may be as yet unvisited, they don't have edsm entries so far. You've got a week or so until I swoop down from the outer vastnesses of the galaxy and bag 'em.
Currently headed for OGLE235-MOA53, then "Neutron World", "Black in Green", "Degenerate Trio", V381 Normae, MAXI J1543-564, TrA X-1, the Hawkins Gap bases and (maybe) home after that.
If anyone is looking for fame, fortune and tagging, OGLE-TR-111 and OGLE-TR-132 may be as yet unvisited, they don't have edsm entries so far. You've got a week or so until I swoop down from the outer vastnesses of the galaxy and bag 'em.
Last edited:
So what's a hypergiant?
There are lots of A class subdwarfs in the game, and a few B and F class ones. I haven't seen any G or K class and the only M class ones are M9VI, which as Jackie explained is a "forced" class, because M9V doesn't appear in game. All TTS and Ae/Be are VI class as well.
Hypergiants are bright supergiants : The only different between super/hyper is a crazy leap in luminosity, and very high mass loss rates due to stellar winds.