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J/A+A/530/A93     de Houtman, Kepler and Halley star catalogs   (Verbunt+ 2011)

Early star catalogues of the southern sky. Verbunt, F., van Gent, R.H. <Astron. Astrophys. 530, A93 (2011)> =2011A&A...530A..93V
ADC_Keywords: Historical catalog ; Positional data Keywords: astrometry - history and philosophy of astronomy Abstract: de Houtman in 1603, Kepler in 1627 and Halley in 1679 published the earliest modern catalogues of the southern sky. We provide machine-readable versions of these catalogues, make some comparisons between them, and briefly discuss their accuracy on the basis of comparison with data from the modern Hipparcos Catalogue. We also compare our results for de Houtman with those by Knobel (1917) finding good overall agreement. About half of the about 200 new stars (with respect to Ptolemaios) added by de Houtman are in twelve new constellations, half in old constellations like Centaurus, Lupus and Argo. The right ascensions and declinations given by de Houtman have error distributions with widths of about 40-arcmin, the longitudes and latitudes given by Kepler have error distributions with widths of about 45-arcmin. Halley improves on this by more than an order of magnitude to widths of about 3-arcmin, and all entries in his catalogue can be identified. The measurement errors of Halley are due to a systematic deviation of his sextant (increasing with angle to 2-arcmin at 60-degrees) and random errors of 0.7-arcmin. The position errors in the catalogue of Halley are dominated by the position errors in the reference stars, which he took from Brahe. Description: We present Machine-readable versions of the star catalogues of de Houtman (1602), Kepler (1627: Secunda Classis and Tertia Classis) and Halley (1679). In addition to the data from the Historical catalogue, the machine-readable version contains the modern identification with a Hipparcos star and the latter's magnitude, and based on this identification the positional accuracy. For Kepler's catalogues we also give cross references to the catalogue of Ptolemaios (in the edition by Toomer 1998). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file houtman.dat 70 304 Star Catalogue of de Houtman (1603) classis.dat 82 434 Secunda Classis and Tertia Classis Kepler (1627) aliter.dat 82 20 Variants on Secunda Classis (Kepler (1627) halley.dat 139 341 Star catalogue of Halley (1679)
See also: I/239 : The Hipparcos and Tycho Catalogues (ESA 1997) 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) Byte-by-byte Description of file: houtman.dat
Bytes Format Units Label Explanations
1- 3 I3 --- F [1/304] Sequence number in de Houtman (1603) Catalogue 5- 6 I2 --- C [1/21] Sequence number of constellation 8 A1 --- --- [=] 9- 11 A3 --- cst Abbreviation of constellation name 13- 14 I2 --- N [1/56] Sequence number of star in constellation 17- 19 I3 deg RAd [0/360] Degrees of right ascension (1) 21- 22 I2 arcmin RAm Minutes of right ascension (1) 24 A1 --- DE- Sign of declination (1) 25- 26 I2 deg DEd Degrees of declination (1) 28- 29 I2 arcmin DEm Arcminutes of declination (1) 32 I1 --- Vf magnitude as given by de Houtman (9=nebulous) 34- 39 I6 --- HIP Hipparcos number of identification 42 I1 --- I [1,6] Quality of identification (G3) 44 I1 --- v.K flag indicating comparison with Knobel (2) 46- 49 F4.1 --- Vmag Magnitude of Hipparcos identification 51- 56 F6.1 arcmin D-RA Difference in RA: Hipparcos-Houtman 58- 63 F6.1 arcmin D-DE Difference in DE: Hipparcos-Houtman 65- 70 F6.1 arcmin Del Offset between de Houtman star and identification
Note (1): The right ascension is given by RA=RAd+RAm/60; the declination, always negative, is given by DE=-(DEd+DEm/60). The equinox is assumed to be AD 1601.0 Note (2): Flag for comparison with Knobel (1917MNRAS..77..580K and 1917MNRAS..77..414K) as follows: 1 = same identification in Knobel 2 = identification in Knobel to alternative identification 3 = identification in Knobel different from our identification
Byte-by-byte Description of file: classis.dat aliter.dat
Bytes Format Units Label Explanations
1- 4 I4 --- K [1005/1438] Sequence number in Classis Catalogue (1) 7- 8 I2 --- C [1/62] Sequence number of constellation (2) 10 A1 --- --- [=] 11- 13 A3 --- cst Abbreviation of constellation name 15- 16 I2 --- N [1/63] Sequence number of star in constellation (3) 18- 19 I2 30deg Elon.Z [1,12] Zodiakal sign of ecliptic longitude, Equinox AD1601 (G1) 21- 22 I2 deg Elon.d [0,30] Degrees of ecliptic longitude (G1) 24- 27 F4.1 arcmin Elon.m Minutes of ecliptic longitude (G1) 30- 31 I2 deg Elat.d Degrees of ecliptic latitude (G2) 33- 34 I2 arcmin Elat.m Arcminutes of ecliptic latitude (G2) 36 A1 --- Elat.- [AB] Sign of ecliptic latitude, Australis (-) or Borealis (+), Equinox AD1601 (G2) 38 I1 --- VK [1,9] Magnitude as given by Kepler (4) 40- 45 I6 --- HIP Hipparcos number of identification 47 I1 --- I [1,6] Quality of identification (G3) 49- 52 F4.1 --- Vmag Magnitude of Hipparcos identification 53- 59 F7.1 arcmin Dlon Difference in longitude: Hipparcos-Kepler 61- 66 F6.1 arcmin Dlat Difference in latitude: Hipparcos-Kepler 68- 73 F6.1 arcmin Del Offset between Kepler star and identification 77- 80 I4 --- P [0/1028] Corresponding sequence number in Ptolemaios (5) 82 I1 --- v.P Flag indicating comparison with Ptolemaios (5)
Note (1): * K < 1005 refers to the Kepler (1627) edition of Brahe's catalogue * 1004 < K < 1303 refers to Secunda Classis, the entries in which we number starting with 1005 (ending with 1302) * K > 1302 refers to Tertia Classis Note (2): * C < 47 constellation in Kepler (1627) edition of Brahe catalogue, to which star is added in Secunda Classis * 46 < C < 51 constellation from catalogue of Ptolemaios, not present in Brahe Catalogue, for which Secunda Classis lists stars * C > 50 new constellations from Plancius, in Tertia Classis It sometimes refers to the Secunda Classis. For detail see paper. Note (3): Numbering continued for stars in constellation listed in Brahe; starting with 1 for stars in constellations not listed in Brahe Note (4): 8 = no magnitude given in catalogue; 9 = nebulous Note (5): Comparison with our identification for corresponding star in Toomer's 1998 edition of the star catalogue of Ptolemaios (Princeton Univ. Press " Ptolemy's Almagest", 2nd ed.) as follows: 1 = same identification as for star in Classis 2 = identification to alternative identification 3 = identification different (including identification for new stars)
Byte-by-byte Description of file: halley.dat
Bytes Format Units Label Explanations
1- 3 I3 --- E Sequence number in Halley catalogue 5- 6 I2 --- C Sequence number of constellation 8 A1 --- --- [=] 9- 11 A3 --- cst Abbreviation of constellation name 13- 14 I2 --- N [1/46] Sequence number of star in constellation 16- 17 I2 30deg Elon.Z [1,12] Zodiakal sign of ecliptic longitude, Equinox AD 1678 (G1) 19- 20 I2 deg Elon.d [0,30] Degrees of ecliptic longitude (G1) 22- 25 F4.1 arcmin Elon.m Minutes of ecliptic longitude (G1) 27 A1 --- Elat.- [-] Sign of ecliptic latitude (G2) 28- 29 I2 deg Elat.d Degrees of ecliptic latitude, Equinox 1678 (G2) 31- 34 F4.1 arcmin Elat.m Arcminutes of ecliptic latitude (G2) 36- 38 F3.1 --- VE Magnitude as given by Halley (9=nebulous) 40- 45 I6 --- HIP1 ? Hipparcos number of first standard star (2) 47- 48 I2 deg d1.d ? Degrees of angle to first standard star (2) 50- 51 I2 arcmin d1.m ? Arcminutes of angle to first standard star (2) 53- 54 I2 arcsec d1.s ? Arcseconds of angle to first standard star (2) 56- 61 I6 --- HIP2 ? Hipparcos number of second standard star (2) 63- 64 I2 deg d2.d ? Degrees of angle to second standard star (2) 66- 67 I2 arcmin d2.m ? Arcminutes of angle to 2nd standard star (2) 69- 70 I2 arcsec d2.s ? Arcseconds of angle to 2nd standard star (2) 72- 73 I2 --- n_HIP2 [-3,-1]? only one standard star used (2) 75- 80 I6 --- HIP ?=0 Hipparcos number of identification 82 I1 --- I [1,6] Quality of identification (G3) 84- 87 F4.1 --- Vmag ? Magnitude of Hipparcos identification 89- 94 F6.1 arcmin Dlon ? Difference in longitude: Hipparcos-Kepler 96-101 F6.1 arcmin Dlat ? Difference in latitude: Hipparcos-Kepler 103-108 F6.1 arcmin Del ? Offset between Kepler star and identification 110-115 I6 --- HIP3 ? Hipparcos number of third standard star (3) 117-118 I2 deg d3.d ? Degrees of angle to third standard star (3) 120-121 I2 arcmin d3.m ? Arcminutes of angle to third standard star (3) 123-124 I2 arcsec d3.s ? Arcseconds of angle to third standard star (3) 126-130 I5 --- HIP4 ? Hipparcos number of fourth standard star (3) 132-133 I2 deg d4.d ? Degrees of angle to fourth standard star (3) 135-136 I2 arcmin d4.m ? Arcminutes of angle to fourth standard star (3) 138-139 I2 arcsec d4.s ? Arcseconds of angle to fourth standard star (3)
Note (2): Halley give measured angles to two standard stars; for some stars more than two standard stars are given, sometimes only one standard star is used, and combined with information from Brahe or Kepler. We indicates these with following n_HIP2 values: -1 = longitude from Brahe -2 = latitude from Brahe -3 = longitude from Kepler These values are announced in the paper as "negative value for HIP" Note (3): These parameters give extra distances to standard stars Note (3): These parameters give extra distances to standard stars for four sequence numbers, announced in the paper as "at the end of the table, four sequence numbers are repeated".
Global notes: Note (G1): The ecliptic longitude is given by λ = (Z-1)30+Elon.d+ Elon.m/60 * Equinox 1601 Jan 1, JD 2305824 for houtman, classis and aliter, * Equinox 1678 Jan 1, JD 2333948 for halley Note (G2): The ecliptic latitude is given by β = ±(Elat.d+Elat.m/60); (+ for Borealis, - for Australis) * Equinox 1601 Jan 1, JD 2305824 for houtman, classis and aliter * Equinox 1678 Jan 1, JD 2333948 for halley Note (G3): Flag 'I' as follows: 1 = secure identification with nearest star 2 = secure identification, even though not nearest star 3 = probable identification 4 = possible identification 5 = not identified 6 = double entry
Acknowledgements: Frank Verbunt, Astron. Inst. Utrecht University, f.w.m.verbunt(at)uu.nl
(End) F. Verbunt [Utrecht Univ., Netherlands], P. Vannier [CDS] 05-Apr-2011
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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