Welcome to the NavList Message Boards.

NavList:

A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    or...
       
    Reply
    Re: Algorithm for star ephemerides?
    From: Andrés Ruiz
    Date: 2001 Apr 20, 6:45 AM

    Here is an extract of the FK5 catalog available at
    ftp://adc.gsfc.nasa.gov/pub/adc/archives/catalogs/1/1149A/
    
    
          FK5 Number
         RA
    
         RA
    
         RA
    
         PM RA
         Dec
    
         Dec
    
         Dec
    
         PM Dec
    
    
    
         h
    
         m
    
         s
    
         s/JC
    
         G
    
         M
    
         S
    
    
    
          1
         ,
         0
         ,
         8
         ,
         23.265
         ,
         1.039
         ,
         29
         ,
         5
         ,
         25.58
         ,
         -16.33
    
          2
         ,
         0
         ,
         9
         ,
         10.695
         ,
         6.827
         ,
         59
         ,
         8
         ,
         59.18
         ,
         -18.09
    
          3
         ,
         0
         ,
         9
         ,
         24.659
         ,
         1.186
         ,
         -45
         ,
         44
         ,
         50.79
         ,
         -18.11
    
          4
         ,
         0
         ,
         10
         ,
         19.257
         ,
         0.074
         ,
         46
         ,
         4
         ,
         20.21
         ,
         0.03
    
          5
         ,
         0
         ,
         11
         ,
         34.437
         ,
         0.079
         ,
         -27
         ,
         47
         ,
         59.12
         ,
         1.65
    
          6
         ,
         0
         ,
         11
         ,
         44.014
         ,
         1.412
         ,
         -35
         ,
         7
         ,
         59.17
         ,
         11.86
    
          7
         ,
         0
         ,
         13
         ,
         14.154
         ,
         0.019
         ,
         15
         ,
         11
         ,
         0.8
         ,
         -1.2
    
          9
         ,
         0
         ,
         19
         ,
         25.674
         ,
         -0.093
         ,
         -8
         ,
         49
         ,
         26.14
         ,
         -3.61
    
          10
         ,
         0
         ,
         20
         ,
         4.251
         ,
         26.778
         ,
         -64
         ,
         52
         ,
         29.25
         ,
         116.39
    
          11
         ,
         0
         ,
         25
         ,
         45.056
         ,
         66.919
         ,
         -77
         ,
         15
         ,
         15.4
         ,
         32.37
    
    
    ...
    and the numbers for Navigational Stars are:
    navStars[numNavigationalStars] =
    {
     "Acamar" , 106 ,
     "Achernar" , 54 ,
     "Acrux" , 462 ,
     "Adhara" , 268 ,
     "Al Na'ir" , 829 ,
     "Aldebaran" , 168 ,
     "Alioth" , 483 ,
     "Alkaid" , 509 ,
     "Alnilam" , 210 ,
     "Alphard" , 354 ,
     "Alphecca" , 578 ,
     "Alpheratz" , 1 ,
     "Altair" , 745 ,
     "Ankaa" , 12 ,
     "Antares" , 616 ,
     "Arcturus" , 526 ,
     "Atria" , 625 ,
     "Avior" , 315 ,
     "Bellatrix" , 201 ,
     "Betelgeuse" , 224 ,
     "Canopus" , 245 ,
     "Capella" , 193 ,
     "Deneb" , 777 ,
     "Denebola" , 444 ,
     "Diphda" , 22 ,
     "Dubhe" , 417 ,
     "Elnath" , 202 ,
     "Eltanin" , 676 ,
     "Enif" , 815 ,
     "Fomalhaut" , 867 ,
     "Gacrux" , 468 ,
     "Gienah" , 457 ,
     "Hadar" , 518 ,
     "Hamal" , 74 ,
     "Kaus Aust." , 689 ,
     "Kochab" , 550 ,
     "Markab" , 871 ,
     "Menkar" , 107 ,
     "Menkent" , 520 ,
     "Miaplacidus" , 348 ,
     "Mirfak" , 120 ,
     "Nunki" , 706 ,
     "Peacock" , 764 ,
     "Polaris" , 907 ,
     "Pollux" , 295 ,
     "Procyon" , 291 ,
     "Rasalhague" , 656 ,
     "Regulus" , 380 ,
     "Rigel" , 194 ,
     "Rigil Kent." , 538 ,
     "Sabik" , -1 ,
     "Schedar" , 21 ,
     "Shaula" , 652 ,
     "Sirius" , 257 ,
     "Spica" , 498 ,
     "Suhail" , 345 ,
     "Vega" , 699 ,
     "Zuben'ubi" , 548
    };
    
    >From Epoch J2000, you must add the Proper Motion, Nutation, and Aberration of 
    the star to calculate the RA and Dec of the star, as Astronomical Algorithms. 
    by Jean Meeus, 2 Ed edition (December 1998). ISBN: 0943396638  said.
    
    Andr�s Ruiz
    http://www.geocities.com/andresruizgonzalez/ Marine Navigation
    e-mail: aruiz{at}orona.es
    
    

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join NavList

    Name:
    (please, no nicknames or handles)
    Email:
    Do you want to receive all group messages by email?
    Yes No

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

    Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.
    Email:

    Email Settings

    Posting Code:

    Custom Index

    Subject:
    Author:
    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site