Star catalogues of Ptolemaios, Ulugh Beg J/A+A/544/A31 ivo://CDS.VizieR/J/A+A/544/A31 doi:10.26093/cds/vizier.35440031 CDS Verbunt F. van Gent R.H. 2017-11-10T11:15:16Z 2014-07-03T18:26:12Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr catalogs astrometry In late antiquity and throughout the middle ages, the positions of stars on the celestial sphere were obtained from the star catalogue of Ptolemaios. A catalogue based on new measurements appeared in 1437, with positions by Ulugh Beg, and magnitudes from the 10th-century astronomer al-Sufi. We provide machine-readable versions of these two star catalogues, based on the editions by Toomer (1998) and Knobel (1917), and determine their accuracies by comparison with the modern Hipparcos Catalogue. The magnitudes in the catalogues correlate well with modern visual magnitudes; the indication `faint' by Ptolemaios is found to correspond to his magnitudes 5 and 6. Gaussian fits to the error distributions in longitude/latitude give widths sigma ~27-arcmin/23-arcmin in the range |{Delta}{lambda},{Delta}{beta}|<50-arcmin for Ptolemaios and {sigma}~22-arcmin/18-arcmin\ in Ulugh Beg. Fits to the range |{Delta}{lambda},{Delta}{beta}<100-arcmin gives 10-15 per cent larger widths, showing that the error distributions are broader than gaussians. The fraction of stars with positions wrong by more than 150-arcmin is about 2 per cent for Ptolemaios and 0.1 percent in Ulugh Beg; the numbers of unidentified stars are 1 in Ptolemaios and 3 in Ulugh Beg. These numbers testify to the excellent quality of both star catalogues (as edited by Toomer and Knobel). 2012A&A...544A..31V https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/544/A31 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to V/61 : Almagest (Ptolemy's Star Catalog) J/A+A/516/A28 : Star catalogue of Tycho Brahe (1627) (Verbunt+, 2010) J/A+A/516/A29 : Star catalogue of Hevelius (1690) (Verbunt+, 2010) J/A+A/530/A93 : de Houtman, Kepler and Halley star catalogs (Verbunt+ 2011) https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/544/A31 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/544/A31 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/544/A31 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/544/A31 https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/544/A31 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/544/A31 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/A+A/544/A31/ptolema (Star Catalogue of Ptolemaios (137)) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/544/A31/ptolema? https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/544/A31/ptolema? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/544/A31/ptolema? GET text/xml+votable 180.0 50000 true 70.2378 89.7044 0.005555555555555556 Cone search capability for table J/A+A/544/A31/ulughbeg (Star Catalogue of Ulugh Beg (1437)) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/544/A31/ulughbeg? https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/544/A31/ulughbeg? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/544/A31/ulughbeg? GET text/xml+votable 180.0 50000 true 2.0796 89.2736 0.005555555555555556 5/9831 6/24 28 34 38 61 88-89 92-93 95 105 134 136 152-153 158 172 200 231 241 251 260 267 288 292 349 371 415 423-424 432-434 436 461 463 467-468 472 476-477 618 623 630 647 650 660 664 669-670 681 707 711 714 718 730 768 786 801 826 829 900-901 913 917 1013-1014 1016 1020 1026 1029 1033 1038 1040-1041 1054 1056 1063 1079 1082 1143 1153 1164 1171 1197 1203 1259 1278 1291-1292 1386 1428 1430 1445 1449 1460 1480 1483 1485 1540 1552 1556 1611 1615 1619 1642 1644 1679 1696-1697 1699 1712 1722 1726 1748 1754 1759 1765-1766 1769 1776 1826 1828 1832 1836 1839 1877 1920 1923 1935 1956 2054 2058 2083 2087 2090 2108 2135-2136 2186 2190-2192 2200 2203 2207 2209-2210 2219 2228 2250 2280 2285 2311 2317 2319 2323 2326 2331 2460 2465 2469 2473 2480 2488 2493 2498 2564 2574 2584 2634 2638 2662 2664 2688-2689 2692-2693 2695 2697 2835 2837 2840 2853 2884 2896 2926 2937 2940 2963 2972 2991 3005 3014 3016 3020 3026 3030 3049 3061 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48649 48651 48673-48674 48743 48747 48749 48756 48758 48760 48762 48767 48794 48806 48831 48855-48856 48873 48884 48887 48889 48903 48907 48940 48993 49032 49034 49045 49047 49049 49089-49090 3.322582951404819e-19 3.852589004194616e-19 https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/544/A31?format=ascii Optical default J/A+A/544/A31/ptolema Star Catalogue of Ptolemaios (137) recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int P [1/1028] Sequence number in Ptolemaios Catalogue meta.id;meta.main int C [1/48] Constellation sequence number meta.id int cst Abbreviation of constellation name meta.id char N [1/45] Sequence number of star in constellation meta.id int f_N [a] 'a' for star outside the constellation figure meta.code char Elon Ecliptic longitude (1) pos.ecliptic.lon Elat [0/90] Ecliptic latitude (2) pos.ecliptic.lat VP [1/9] Magnitude as given by Ptolemaios (3) phot.mag;em.opt int q_VP [bf] brighter/fainter qualifier by Ptolemaios (G1) meta.code.qual char HIP ? Hipparcos number of identification meta.number int nullable I [1/6] Quality of identification flag (G2) meta.code int T [0/3] Comparison flag with Toomer (4) meta.code.error int Vmag Johnson V magnitude (from Hipparcos) mag phot.mag;em.opt.V float Dl Difference in longitude (Hipparcos-Ptolemaios) arcmin pos;arith.diff float Db Difference in latitude (Hipparcos-Ptolemaios) arcmin pos;arith.diff float dist Distance {Delta} between Ptolemaios and Hipparcos positions arcmin pos;arith.diff float Flag [*] Flag for annotation in article meta.code.error char Simbad Simbad column added by the CDS meta.ref.url char _RA.icrs Right ascension (ICRS) at Epoch=J-128. (computed by VizieR, not part of the original data) pos.eq.ra nullable indexed _DE.icrs Declination (ICRS) at Epoch=J-128. (computed by VizieR, not part of the original data) pos.eq.dec nullable indexed
J/A+A/544/A31/ulughbeg Star Catalogue of Ulugh Beg (1437) recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int U [1/1018] Sequence number in Ulugh Beg Catalogue meta.id;meta.main int n_U [c] 'c' when the position is derived from Ptolemaios via al-Sufi meta.note char P Corresponding sequence number of in Ptolemaios meta.id int C Sequence number of constellation meta.id int cst Abbreviation of constellation name meta.id char N Sequence number of star in constellation meta.id int n_N [a] 'a' for star outside the constellation figure meta.note char Elon Ecliptic longitude (1) pos.ecliptic.lon Elat Degrees of ecliptic latitude (2) pos.ecliptic.lat VU Magnitude as given by Ulugh Beg (3) phot.mag;em.opt int q_VU [bf] brighter/fainter qualifier by Ulugh Beg (G1) meta.code.qual char HIP ? Hipparcos number of identification meta.number int nullable I Flag indicating quality of identification (G2) meta.code int K [0/3] Comparison flag with Knobel (4) meta.code int I-P [0/3] Comparison flag with Ptolemaios (5) meta.code int Vmag Johnson V magnitude (from Hipparcos) mag phot.mag;em.opt.V float Dl Difference in longitude (Hipparcos-UlughBeg) arcmin pos;arith.diff float Db Difference in latitude (Hipparcos-UlughBeg) arcmin pos;arith.diff float dist Distance {Dleta} between UlughBeg and Hipparcos positions arcmin pos;arith.diff float Flag [*] Flag for annotation in article meta.code.error char Simbad Simbad column added by the CDS meta.ref.url char _RA.icrs Right ascension (ICRS) at Epoch=J1437. (computed by VizieR, not part of the original data) pos.eq.ra nullable indexed _DE.icrs Declination (ICRS) at Epoch=J1437. (computed by VizieR, not part of the original data) pos.eq.dec nullable indexed