Close orbits

BradHann

BradHann
Is there a word for planets that orbit so close to their parent star that they show up as soon as you honk the disco scanner, without even having to enter FSS? If not, there should be, and is seven a lot?

This is the sysmap pre-FSS:
zJwsYr2.jpg


Side note: there were no other planets orbiting the primary.
 

Romeo India Charlie

Romeo India Charlie
Seven is a lot. There are some well-known systems with such planets, e.g. Skardee but I don't think I ever saw 7 of them and, to make it weirder, with a belt between star and planets.
Do we have a name for it? I don't think so. Gas Giants in close orbit are referred as Hot Jupiters but I don't recall a generic designation for any planet that meets such criteria. They are, however, one of my favourite things to visit, so, if you don't mind, I'll add this system to my list. :)
 

Sapyx

Sapyx
There isn't a word for them; they're just "planets that are within passive scanner range". If that's too verbose, we can call them "passive sensor planets", or PSPs. You don't even need to "honk" to find these, they will appear on radar alongside the primary star a few seconds after arriving in the system, whether you Honk or not as the passive scanner is just that: passive. Specifically, they're "planets within 31 Ls of the arival point", as that is the range of the passive scanner, though the arrival point changes by several Ls depending on the direction you arrive from, so "the arrival point" isn't a fixed point in space but rather a sphere of possible arrival points, at a fixed distance from the primary star. If they're gas giants, then such planets would all qualify as "Hot Jupiters".

Seven is a lot of planets within passive sensor range for a procedurally-generated system, especially given that none of them are moons or co-orbitals; that's seven completely separate orbits, plus an asteroid belt, all fitting within 25 Ls or so of that star.

The six innermost planets and the four moons in the TRAPPIST-1 system all appear without the need to honk/FSS; depending on where planet 7 is in its orbit and where your Arrival point is, you might get all seven planets (number 7's orbit is 32 Ls radius). But TRAPPIST-1 is hand-carved, not proc-genned.
 

Orvidius

Orvidius
Yeah, that's very cool. I can't say I've found any systems in my travels that have that many planets pop up from the passive scan.

Looking at the data, when eliminating moons and just considering the planets, the record appears to be 9 planets with a cut-off of 35 lightseconds from arrival, for which there are 98 systems meeting that criteria (pretty darn rare, shown below). The data also contain 687 systems with 8 planets within 35 ls, and 3469 systems with 7 planets there. Considering this is out of over 48 million systems in the EDSM data (48,717,793 in my current update), having 7+ is on the order of 4254 out of 48717793, or 0.008% (less than a percent of a percent).

Code: 
mysql> select edsm_id,s.name,count(*) as planets from systems s,planets p where edsm_id=systemId and distanceToArrival is not null and distanceToArrival>0 and distanceToArrival<=35 and s.deletionState=0 and p.deletionState=0 and CAST(p.name as binary) rlike ' [0-9]$' group by edsm_id having count(*)>=9;
+----------+----------------------------+---------+
| edsm_id  | name                       | planets |
+----------+----------------------------+---------+
|    73990 | Tr 24 Sector JF-R b20-1    |       9 |
|   637985 | Col 285 Sector RE-O b20-1  |       9 |
|  2201792 | Outordy NB-P b6-0          |       9 |
|  2440724 | Myoideau KL-H b51-0        |       9 |
|  3712500 | Col 285 Sector ZI-T b19-2  |       9 |
|  5861506 | Droju YG-Y b20-0           |       9 |
|  6102884 | Synuefe UN-P b52-5         |       9 |
|  7135608 | Plio Eurl EB-L b51-0       |       9 |
|  8920031 | Bleia Eohn SH-G b3-0       |       9 |
| 10910072 | Blu Thua VU-R b32-1        |       9 |
| 11854484 | Drojaea QW-V b8-6          |       9 |
| 12807079 | Pencil Sector FG-Y e21     |       9 |
| 15284439 | Synuefe XD-Q b22-0         |       9 |
| 15854743 | Veil West Sector BB-W b2-0 |       9 |
| 19025928 | Wregoe HV-B b27-2          |       9 |
| 20837347 | Eidaills MU-Y b5-0         |       9 |
| 21053307 | Hegua LA-I b51-2           |       9 |
| 21343936 | Bleae Thua LV-F b52-2      |       9 |
| 21377121 | Boewnst ID-E b30-19        |       9 |
| 21501702 | Skaudai DB-F b57-2         |       9 |
| 21577518 | Prae Drye BB-K b13-0       |       9 |
| 21851041 | Thailooe AH-Y b45-2        |       9 |
| 23114531 | NGC 2244 Sector RW-I b11-1 |       9 |
| 24801153 | Pyraleau SN-E b59-17       |       9 |
| 25736674 | Praea Chraei VW-L b21-0    |       9 |
| 27725981 | Phylucs IE-L b52-0         |       9 |
| 28327856 | Praea Euq ZJ-O b20-4       |       9 |
| 28715918 | Swoilz EH-A b6-1           |       9 |
| 29149021 | Synuefai ME-B b58-0        |       9 |
| 30687630 | M21 Sector XV-L b8-4       |       9 |
| 30741770 | Synuefe YY-K b39-0         |       9 |
| 31736748 | Pyramoe SV-Z b19-2         |       9 |
| 32282340 | M7 Sector TP-T b5-4        |       9 |
| 32450505 | Pyramio PW-Z b5-1          |       9 |
| 32483999 | Bleia Dryiae LN-I c26-7    |       9 |
| 32554482 | NGC 6830 Sector JF-O a23-1 |       9 |
| 32560888 | Swoilz ZJ-E b42-0          |       9 |
| 32812049 | Blua Eaec GI-H b56-85      |       9 |
| 32824244 | Blu Thua EA-K b23-2        |       9 |
| 33031836 | Pyramoe LM-Q b10-1         |       9 |
| 33430253 | Byeia Eurk IS-N b6-24      |       9 |
| 33749911 | Eol Prou ZD-F b13-5        |       9 |
| 33995144 | Blaa Hypa UO-D b17-44      |       9 |
| 34047850 | Prua Dryoae ML-D a53-2     |       9 |
| 34805067 | Thaileia KH-G b16-3        |       9 |
| 34854692 | Skaude DB-B b18-6          |       9 |
| 34963863 | Thailoe KB-U b36-1         |       9 |
| 35144243 | Systipua SX-X b48-0        |       9 |
| 35602066 | Phrio Hypue ZW-O b12-0     |       9 |
| 35878247 | Dumbaa VS-C b41-123        |       9 |
| 36695143 | Gria Drye NV-N a47-4       |       9 |
| 37143502 | Aucoks EK-K b42-0          |       9 |
| 37199563 | Flyae Flyi NV-E b54        |       9 |
| 37305903 | Byua Aowsy VE-Z b55-0      |       9 |
| 37506146 | Dryiquae QG-J b52-0        |       9 |
| 37583108 | Striechoo ZM-E b31-1       |       9 |
| 37673179 | Byua Aub CA-T b31-0        |       9 |
| 37934266 | Greae Ploe JN-H b2-0       |       9 |
| 38530692 | Nyauthi VE-R b24-7         |       9 |
| 38990076 | Pro Aec AA-O b20-2         |       9 |
| 39442129 | Eowyg Brai LW-C b45-0      |       9 |
| 39769962 | Ploi Aim ZN-C b2-2         |       9 |
| 39876020 | Mylaifaa NY-R b50-72       |       9 |
| 39960979 | Pro Aob MH-T b17-0         |       9 |
| 40294996 | Prua Prau GS-W b21-5       |       9 |
| 40419136 | Skaudou VA-P a115-15       |       9 |
| 40718240 | Byoo Aob AS-D b2-0         |       9 |
| 40771563 | Flyua Hypa FL-G b42-1      |       9 |
| 40832082 | Egnaiw OC-F b55-0          |       9 |
| 41164196 | Blua Bluae SD-G b57-2      |       9 |
| 41780963 | Byeia Euq SP-K b52-2       |       9 |
| 43064761 | Wregoe RW-N c6-10          |       9 |
| 43116539 | Drojia EI-X b19-0          |       9 |
| 43543139 | Floarks BR-J b52-27        |       9 |
| 43577378 | Preae Aihm TQ-R b45-26     |       9 |
| 43764892 | Traikoa KJ-Y b30-0         |       9 |
| 43835708 | Boelts IU-R b7-28          |       9 |
| 44811621 | Wepai GH-Y a96-10          |       9 |
| 45508535 | Drojeae TF-W b35-0         |       9 |
| 45611841 | Prieluia ZZ-O b19-15       |       9 |
| 45790577 | Cyoidai MS-U b22-1         |       9 |
| 45917762 | Synookua QQ-R b20-0        |       9 |
| 45962627 | Eor Auscs RL-D b29-34      |       9 |
| 46137902 | NGC 752 Sector XZ-G b26-0  |       9 |
| 46246853 | Chooe Drye EH-I b1-0       |       9 |
| 46431924 | Pru Eurk UY-X b28-0        |       9 |
| 46882547 | IC 2944 Sector RA-I b12-0  |       9 |
| 46947450 | Byoi Euq FB-A b5           |       9 |
| 47406183 | Sifaea TU-I b37-0          |       9 |
| 47544290 | Sleguae QI-R a45-0         |       9 |
| 47631749 | Syniechaei HX-T b36-0      |       9 |
| 47639554 | Evangelis                  |       9 |
| 47952095 | Ploi Briae DZ-S d3-119     |       9 |
| 48145626 | Aiphaitt CI-J b36-235      |       9 |
| 48290250 | Col 173 Sector GK-L b23-0  |       9 |
| 48574036 | Flyua Flyuae PC-L b41-124  |       9 |
| 48734701 | Outordy RO-S b45-0         |       9 |
| 48754050 | Preou Chraei LD-T b58-0    |       9 |
+----------+----------------------------+---------+
98 rows in set (7 min 32.08 sec)
 

Romeo India Charlie

Romeo India Charlie
I once had a similar problem to solve where the solution was to have a colour map. Instead of having a mathematical solution, I'd get the colour of a pixel of a high resolution image. In this case we would need a high resolution image with all the regions with different colours (it can just be an int of one of the colour channels) and get the colour of position X,Z of the system, to the X,Y of the image. Would this work?
 

Orvidius

Orvidius
Romeo India Charlie said:
I once had a similar problem to solve where the solution was to have a colour map. Instead of having a mathematical solution, I'd get the colour of a pixel of a high resolution image. In this case we would need a high resolution image with all the regions with different colours (it can just be an int of one of the colour channels) and get the colour of position X,Z of the system, to the X,Y of the image. Would this work?
Click to expand...

Was this intended for the thread about determining regions for star systems? What you're describing is exactly what I've been working on. ;)
 

malenfant

M
I just call them "Compact systems" myself. I found one with 6 (and a moon) metal-rich planets within 35 ls (0.07 AU) of their star.

The Galactic Mapping Project & Historical Archive of Exploration

Name: Eodgold Anomaly Galmap ref: Eodgold AA-A h8 Type: Planetary Description: "This unusual system is located on the boundary between the Temple and Orion-Cygnus region. A highly massive Herbig Ae/Be is in binary orbit with a massive but cold Wolf-Rayet. Each has a collection of odd bodies...
forums.frontier.co.uk forums.frontier.co.uk
 
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