| """Build the attributed, compact catalogue shipped with Sidereal.""" |
| import csv, io, json, pathlib, requests, datetime |
| ROOT=pathlib.Path(__file__).resolve().parents[1] |
| DATA=ROOT/'public/data'; FONT=ROOT/'public/fonts' |
| def download(url): |
| r=requests.get(url, timeout=90); r.raise_for_status(); return r.content |
| def jsave(name,data): |
| (DATA/name).write_text(json.dumps(data,separators=(',',':'),ensure_ascii=False)) |
| fontbase='https://raw.githubusercontent.com/rektdeckard/departure-mono/main/public/assets/' |
| for name in ['DepartureMono-Regular.woff2','LICENSE']: |
| (FONT/name).write_bytes(download(fontbase+name)) |
| base='https://raw.githubusercontent.com/astronexus/HYG-Database/main/hyg/CURRENT/' |
| raw=download(base+'hygdata_v41.csv').decode() |
| rows=list(csv.DictReader(io.StringIO(raw))) |
| stars=[] |
| for r in rows: |
| if r['id']=='0': continue |
| mag=float(r['mag'] or 99); dist=float(r['dist'] or 100000) |
| if mag>7.5 and dist>25 and not r['proper']: continue |
| number=lambda k: round(float(r[k]),6) if r.get(k) else None |
| stars.append({'id':'s'+r['id'],'hip':r['hip'],'name':r['proper'] or (r['bf'].strip() or (r['gl'].strip() if r['gl'] else 'HIP '+r['hip'] if r['hip'] else 'HD '+r['hd'] if r['hd'] else 'HYG '+r['id'])),'named':bool(r['proper']),'ra':number('ra'),'dec':number('dec'),'mag':mag,'dist':round(dist*3.2615638,3) if 0<dist<100000 else None,'spec':r['spect'],'con':r['con'],'lum':number('lum'),'ci':number('ci'),'pmra':number('pmra'),'pmdec':number('pmdec'),'x':number('x'),'y':number('y'),'z':number('z')}) |
| jsave('stars.json',stars) |
| (DATA/'HYG-LICENSE.txt').write_bytes(download(base+'LICENSE')) |
| cb='https://raw.githubusercontent.com/ofrohn/d3-celestial/master/' |
| for name in ['messier.json','constellations.lines.json','constellations.json']: |
| (DATA/name).write_bytes(download(cb+'data/'+name)) |
| (DATA/'CELESTIAL-LICENSE.txt').write_bytes(download(cb+'LICENSE')) |
| sat=json.loads(download('https://celestrak.org/NORAD/elements/gp.php?GROUP=visual&FORMAT=JSON')) |
| jsave('satellites.json',{'fetchedAt':datetime.datetime.now(datetime.timezone.utc).isoformat(),'source':'CelesTrak visual group','elements':sat}) |
| starlink=json.loads(download('https://celestrak.org/NORAD/elements/gp.php?GROUP=starlink&FORMAT=JSON')) |
| jsave('starlink.json',{'fetchedAt':datetime.datetime.now(datetime.timezone.utc).isoformat(),'source':'CelesTrak Starlink group','elements':starlink}) |
| print(f'Saved {len(stars)} stars, {len(sat)} satellite elements, Messier catalogue, constellations and font.') |
| print('HYG license:',(DATA/'HYG-LICENSE.txt').read_text()[:500]) |
|
|
| from fetch_satellite_catalogue import fetch_catalogue |
| fetch_catalogue() |
|
|
