Questions tagged [hipparcos]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
3
votes
0answers
42 views

Why is it hard to reconcile Gaia DR2 with the HIP data set

I'm trying to get a database of about 20 million of the brightest stars in the sky for a project I'm working on, and I want to reconcile it with the Hipparcos data set. Currently, I'm only using the ...
0
votes
1answer
150 views

Hip2.dat and Solo, Binary and Multiple Star Systems

I've come across http://cdsarc.u-strasbg.fr/viz-bin/Cat?I/311#sRM2.1 and am trying to decipher the hip2.dat file to work out whether a star is a solo, binary or multiple star. Ideally would be ...
1
vote
3answers
358 views

Calculating Radial Velocity from Hipparcos

Using data from Hipparcos is it possible to calculate Radial Velocity. If we take 19 Leonis as example, RV is -3.70. Is it calculated from Proper Motion? Can I ask that any formulas be done in long ...
1
vote
1answer
95 views

Variable Types of Stars

I'm trying to decode the Variable Types of stars in the Hipparcos Library. I see there are a number of stars for example :- EA/AR - Does that mean the star is both a EA(Eclipsing Binary Star) and AR ...
2
votes
0answers
73 views

Have I misunderstood Hipparcos Data with Arcturus?

If I take Arcturus for example, its HipID is 32349 and when i look at the raw Hip_Main.dat, it stays that the star's Spectral is K2IIIp whilst Wikipedia says the star's is KOIII. Why the discrepancy, ...