• Welcome to the new COTI server. We've moved the Citizens to a new server. Please let us know in the COTI Website issue forum if you find any problems.
  • We, the systems administration staff, apologize for this unexpected outage of the boards. We have resolved the root cause of the problem and there should be no further disruptions.

System HD 10180 Has (at least) 9 Planets

saundby

saundby

SOC-14 1K
http://arxiv.org/pdf/1204.1254v1.pdf

"According to our results, there is evidence for up to nine planets orbiting HD 10180, which would make this this star a record holder in having more planets in its orbits than there are in the Solar system. We revise the uncertainties of the previously reported six planets in the system, verify the existence of the seventh signal, and announce the detection of two additional statistically significant signals in the data. If of planetary origin, these two additional signals would correspond to planets with minimum masses of 5.1+3.1 −3.2 and 1.9+1.6 −1.8 M⊕ on orbits with 67.55+0.68 −0.88 and 9.655+0.022 −0.072 days periods (denoted using the 99% credibility intervals), respectively."

Not to be confused with system HD 1080p. ;)
 
The Exo Planet app is listing it at 6 since the singles have not verified the other 3. Most importantly C D E F are in the habitable zone of the star. It has also added MOA bin-1b a 3.70 Jupiter mass gg.
 
Gray Pennell said:
The Exo Planet app is listing it at 6 since the singles have not verified the other 3. Most importantly C D E F are in the habitable zone of the star. It has also added MOA bin-1b a 3.70 Jupiter mass gg.
Click to expand...


But these are all gas giants. They may have habitable moons, though...
 
who needs a star drive to have fun.

4 Gas giants each having one habitable moon with divergent evolutionary tracks, break out the One Small Step Rules or something similiar and have a blast. :rofl:
 
Isnt that kinda of the way FireFly Universe works. Long colony ship trip to a system with 12 planets and dozens of moons and most of them inhabited especially the central or Goldilock Worlds
 
Yup, that's the way I believe the 'Verse has been described.

I also like some of Jack Vance's big systems, like the 26 planets of the Rigel Concourse. In fact, the Oikumene and Gaian Reach where my original influences for interstellar government in my Traveller game (before the 3I was explicitly published, but the nobility rules and such were there.)
 
I have an entire quinary star system (designed using book 6) to act as MTU for a campaign I ran back in the late eighties.

Complete stats of all the inhabited worlds etc. Chronology of events to frame up the history of humanity in the system and the current geo-political landscape.

I am tempted to re-use it one day. With the great frontier being the companion star system, which is just beginning to be opened up. To get there is a slow process needing low berth/cold sleep.

No FTL at all, set about 5000 years in the future.
 
Last edited:
forget the words, look at the tables .... theres good stuff like period (aka their "year") and orbit (AU = compared to earth>sun distance) columns that anyone can scan thru for the highlights

if you see something in the table like a circle with a plus inside that means they are comparing it to earth's mass /size while a circle with a minus inside should mean its big enough to be compared to a standard gas giant (jupiter ?)
 
I'm not sure what the circle with a minus sign is you're referring to, but a circle with a dot in the center is a symbol for the Sun. So, something like:

12.1 M⊕ means 12.1 Earth masses, and
1.07 M⊙ means 1.07 Solar masses.

In the tables of orbital elements, however, there is M0 which is mean anomaly (position at a given date), in many typefaces it can look like solar masses.

m sin(i) is minimum mass.

MJ is used for Jupiter masses, or MJUP. I didn't see it referenced in the tables in this paper.
 
You must log in or register to reply here.

Similar threads

T
The Solar System
2
Replies
23
Views
3K
TheDS
T
Back
Top