2021-03-03T09:28:44Z
100
Constellations as Polygons
This table contains constellation data from Davenhall et al,
ivo://cds.vizier/vi/49, converted to ADQL-queriable polygons.
The polygons use the J2000 points, and we skip the interpolated
points.
constellations
Davenhall, A.C.; Legget, S.K.
1997yCat.6049....0D
Research
Amateur
General
Catalog
0/0-11
with open(self.sourceToken, "rb") as f:
data, metadata = votable.load(f)
constellations = {}
for index, row in enumerate(metadata.iterDicts(data)):
self.location = f"Row {index}"
if row["type"] == "O":
constellations.setdefault(row["cst"], []).extend(
[row["RAJ2000"], row["DEJ2000"]])
for name, points in constellations.items():
yield {
"abbrev": name.strip(),
"p": pgsphere.SPoly.fromDALI(points),
}
@abbrev
@ra, @dec = @p.getCenter()
@ra /= DEG
@dec /= DEG
base.NotGiven
"name"
{"EQU": "EQL"}
"name"
{
"AND": "Andromeda", "ANT": "Antlia", "APS": "Apus", "AQR": "Aquarius",
"AQL": "Aquila", "ARA": "Ara", "ARI": "Aries", "AUR": "Auriga",
"BOO": "Bootes",
"CAE": "Caelum", "CAM": "Camelopardalis", "CNC": "Cancer",
"CVN": "Canes Venatici", "CMA": "Canis Major", "CMI": "Canis Minor",
"CAP": "Capricornus", "CAR": "Carina", "CAS": "Cassiopeia",
"CEN": "Centaurus", "CEP": "Cepheus", "CET": "Cetus", "CHA": "Chamaeleon",
"CIR": "Circinus", "COL": "Columba", "COM": "Coma Berenices",
"CRA": "Corona Australis", "CRB": "Corona Borealis", "CRV": "Corvus",
"CRT": "Crater", "CRU": "Crux", "CYG": "Cygnus",
"DEL": "Delphinus", "DOR": "Dorado", "DRA": "Draco",
"EQL": "Equuleus", "ERI": "Eridanus",
"FOR": "Fornax",
"GEM": "Gemini", "GRU": "Grus",
"HER": "Hercules", "HOR": "Horologium", "HYA": "Hydra", "HYI": "Hydrus",
"IND": "Indus",
"LAC": "Lacerta", "LEO": "LEO", "LMI": "Leo Minor", "LEP": "Lepus",
"LIB": "Libra", "LUP": "Lupus", "LYN": "Lynx", "LYR": "Lyra",
"MEN": "Mensa", "MIC": "Microscopium", "MON": "Monoceros", "MUS": "Musca",
"NOR": "Norma",
"OCT": "Octans", "OPH": "Ophiuchus", "ORI": "Orion",
"PAV": "Pavo", "PEG": "Pegasus", "PER": "Perseus", "PHE": "Phoenix",
"PIC": "Pictor", "PSC": "Pisces", "PSA": "Piscis Austrinus",
"PUP": "Puppis", "PYX": "Pyxis",
"RET": "Reticulum",
"SGE": "Sagitta", "SGR": "Sagittarius", "SCO": "Scorpius",
"SCL": "Sculptor", "SCT": "Scutum", "SER": "Serpens", "SEX": "Sextans",
"TAU": "Taurus", "TEL": "Telescopium", "TRI": "Triangulum",
"TRA": "Triangulum Australe", "TUC": "Tucana",
"UMA": "Ursa Major", "UMI": "Ursa Minor",
"VEL": "Vela", "VIR": "Virgo", "VOL": "Volans", "VUL": "Vulpecula",
"SER1": "Serpens caput",
"SER2": "Serpens cauda",}
cstl cone
This cone search will return all
constellations within the cone, together with the J2000 polygons
of them.
40
30
2
rows = self.getVOTableRows()
self.assertEqual(set(r["abbrev"] for r in rows),
{'AND', 'TRI'})
poly = rows[0]["p"]
self.assertTrue(isinstance(poly, pgsphere.SPoly))
self.assertTrue(len(poly.asDALI())>10)