New Zealand Gazette – 1871 – No. 12

Page 108

✨ Longitude Observation Tables



TABLE OF OBSERVATIONS, &C.—continued.

Date, 1870. Star. Position of Axis. Observed Times of Transits by Sidereal Chron. Reduction to Mean Wire. Instrumental Errors. True Meridian Transits by Chron. Daily rate of Chron. Chron. Error furnished by each Star and reduced for rate to the epoch of the first transit on the given day. Mean Chron. Error by Weights. Right Ascension from the Observations. Probable Error of Moon's observed Right Ascension. LONGITUDE EAST, Deduced from the Tabular Right Ascensions in the Nautical Almanac "Moon Culminations."
Wires. 1, 2, 3, 4, 5 H M S a, b, c H M S s H M S Weight. H M S Probable Error. H M S

Sept. 2

  • Scorpii C.E.
    • Observed Times (Wires 1-5): 22.0 09.0 56.0 43.0 30.0
    • Reduction to Mean Wire: 14 02 56.00
    • Instrumental Errors: a +0.39, b +0.27, c +0.10
    • True Meridian Transits: 14 02 55.77
    • Daily rate of Chron: +1.50
    • Chron. Error (H M S): 2 01 31.96
    • Weight: 1.000
    • Right Ascension (H M S): 16 04 27.72
  • Moon I.
    • Observed Times (Wires 1-5): 00.5 47.3 34.0 21.0 07.8
    • Reduction to Mean Wire: 14 12 34.12
    • True Meridian Transits: 14 12 33.90
    • Chron. Error (H M S): 2 01 31.83
    • Weight: 1.000
    • Right Ascension (H M S): 16 14 05.87
    • Probable Error (RA): 0.113
    • Longitude East: 11 39 56.18
    • Probable Error (Lon): 5.5
    • Weight (Lon): 0.860
  • Ophiuchi
    • Observed Times (Wires 1-5): 22.7 09.2 56.0 42.2 28.8
    • Reduction to Mean Wire: 15 16 55.78
    • True Meridian Transits: 15 16 55.57
    • Chron. Error (H M S): 2 01 31.83
    • Weight: 1.000
    • Right Ascension (H M S): 17 18 27.59

Sept. 3

  • Moon I.
    • Observed Times (Wires 1-5): 22.0 08.6 55.0 41.5 28.0
    • Reduction to Mean Wire: 15 12 55.02
    • Instrumental Errors: a +0.16, b -0.16, c +0.10
    • True Meridian Transits: 15 12 55.13
    • Daily rate of Chron: +1.30
    • Chron. Error (H M S): 2 01 33.36
    • Weight: 1.000
    • Mean Chron. Error by Weights (H M S): 2 01 33.36
    • Probable Error (Mean Chron): 0.051
    • Right Ascension (H M S): 17 14 28.49
    • Probable Error (RA): 0.116
    • Longitude East: 11 39 53.54
    • Probable Error (Lon): 5.5
    • Weight (Lon): 0.860
  • Ophiuchi
    • Observed Times (Wires 1-5): 21.0 07.3 54.0 40.5 27.1
    • Reduction to Mean Wire: 15 16 53.98
    • Right Ascension (H M S): 17 18 27.45
  • 21 Sagittarii
    • Observed Times (Wires 1-5): 31.0 18.0 04.8 51.5 38.5
    • Reduction to Mean Wire: 16 16 04.76
    • Right Ascension (H M S): 18 17 38.29

Sept. 4

  • Ophiuchi
    • Observed Times (Wires 1-5): 56.0 42.3 29.0 15.0 01.7
    • Reduction to Mean Wire: 15 12 28.80
    • Instrumental Errors: a -0.39, b -0.09, c +0.10
    • True Meridian Transits: 15 12 28.66
    • Daily rate of Chron: +0.60
    • Chron. Error (H M S): 2 01 34.44
    • Weight: 1.000
    • Mean Chron. Error by Weights (H M S): 2 01 34.44
    • Probable Error (Mean Chron): 0.029
    • Right Ascension (H M S): 17 14 03.10
  • Ophiuchi
    • Observed Times (Wires 1-5): 20.0 06.8 53.0 39.7 26.0
    • Reduction to Mean Wire: 15 16 53.10
    • True Meridian Transits: 15 16 52.95
    • Right Ascension (H M S): 17 18 27.39
  • Sagittarii
    • Observed Times (Wires 1-5): 53.0 40.0 27.0 13.5 00.5
    • Reduction to Mean Wire: 16 04 26.80
    • Instrumental Errors: c -0.12
    • True Meridian Transits: 16 04 26.67
    • Right Ascension (H M S): 18 06 01.13
  • Moon I.
    • Observed Times (Wires 1-5): 33.3 19.2 06.1 52.1 38.2
    • Reduction to Mean Wire: 16 14 05.78
    • Instrumental Errors: c -0.19
    • True Meridian Transits: 16 14 05.73
    • Right Ascension (H M S): 18 15 40.19
    • Probable Error (RA): 0.108
    • Longitude East: 11 39 46.45
    • Probable Error (Lon): 5.3
    • Weight (Lon): 0.926
  • 21 Sagittarii
    • Observed Times (Wires 1-5): 30.2 17.1 03.9 50.5
    • Reduction to Mean Wire: 16 16 03.86
    • Instrumental Errors: c -0.20
    • True Meridian Transits: 16 16 03.80
    • Right Ascension (H M S): 18 17 38.26
  • Sagittarii
    • Observed Times (Wires 1-5): 56.0 42.8 29.7 16.3 03.0
    • Reduction to Mean Wire: 17 00 29.56
    • Instrumental Errors: c -0.09
    • True Meridian Transits: 17 00 29.42
    • Right Ascension (H M S): 19 02 03.88
  • Sagittarii
    • Observed Times (Wires 1-5): 01.3 43.5 35.5 22.5 09.6
    • Reduction to Mean Wire: 17 12 35.48
    • Instrumental Errors: c -0.11
    • True Meridian Transits: 17 12 35.32
    • Right Ascension (H M S): 19 14 09.81

Sept. 5

  • Capricorni
    • Observed Times (Wires 1-5): 47.0 33.8 21.0 07.8 54.2
    • Reduction to Mean Wire: 18 10 20.76
    • Instrumental Errors: a -0.47, b -0.19
    • True Meridian Transits: 18 10 20.66
    • Daily rate of Chron: 0.00
    • Chron. Error (H M S): 2 01 35.19
    • Weight: 1.000
    • Mean Chron. Error by Weights (H M S): 2 01 35.10
    • Probable Error (Mean Chron): 0.032
    • Right Ascension (H M S): 20 11 55.76
  • Capricorni
    • Observed Times (Wires 1-5): 31.6 18.8 05.8 52.5 39.8
    • Reduction to Mean Wire: 18 57 05.70
    • Instrumental Errors: b -0.18
    • True Meridian Transits: 18 57 05.57
    • Right Ascension (H M S): 20 58 40.67
  • Moon I.
    • Observed Times (Wires 1-5): 38.0 24.8 11.5 58.4 44.9
    • Reduction to Mean Wire: 19 11 11.52
    • True Meridian Transits: 19 11 11.39
    • Right Ascension (H M S): 21 12 46.49
    • Probable Error (RA): 0.109
    • Longitude East: 11 39 57.01
    • Probable Error (Lon): 5.9
    • Weight (Lon): 0.747
  • Capricorni
    • Observed Times (Wires 1-5): 53.5 27.8 14.7 01.8 19.13
    • Reduction to Mean Wire: 19 13 27.67
    • True Meridian Transits: 19 13 27.54
    • Chron. Error (H M S): 2 01 35.19
    • Weight: 0.928
    • Right Ascension (H M S): 21 15 02.64
  • Aquarii.
    • Observed Times (Wires 1-5): 17.8 05.0 52.3 39.8 27.0
    • Reduction to Mean Wire: 19 57 52.38
    • Instrumental Errors: c -0.17
    • True Meridian Transits: 19 57 52.22
    • Right Ascension (H M S): 21 59 27.32
  • Aquarii.
    • Observed Times (Wires 1-5): 33.0 08.0 55.2 42.7
    • Reduction to Mean Wire: 20 02 07.87
    • True Meridian Transits: 20 02 07.69
    • Right Ascension (H M S): 22 03 42.79

Sept. 7

  • Aquarii...
    • Observed Times (Wires 1-5): 41.9 29.3 16.8 04.5 52.0
    • Reduction to Mean Wire: 20 44 16.90
    • Instrumental Errors: a -0.55, b -0.15, c +0.10
    • True Meridian Transits: 20 44 16.63
    • Daily rate of Chron: +0.73
    • Chron. Error (H M S): 2 01 35.53
    • Weight: 1.000
    • Mean Chron. Error by Weights (H M S): 2 01 35.53
    • Probable Error (Mean Chron): 0.051
    • Right Ascension (H M S): 22 45 52.16
    • Probable Error (RA): 0.116
    • Longitude East: 11 39 54.60
    • Probable Error (Lon): 6.7
    • Weight (Lon): 0.579
  • Moon I.
    • Observed Times (Wires 1-5): 38.6 26.0 13.4
    • Reduction to Mean Wire: 20 56 13.18
    • Instrumental Errors: c -0.17
    • True Meridian Transits: 20 56 12.94
    • Right Ascension (H M S): 22 57 48.48
  • Aquarii...
    • Observed Times (Wires 1-5): 56.8 44.2 31.8 19.0 06.7
    • Reduction to Mean Wire: 21 07 31.70
    • Instrumental Errors: c -0.20
    • True Meridian Transits: 21 07 31.48
    • Right Ascension (H M S): 23 09 07.02

Sept. 9

  • Sagittarii C.W.
    • Observed Times (Wires 1-5): 46.3 59.7 12.9 26.0 38.8
    • Reduction to Mean Wire: 17 37 12.74
    • Instrumental Errors: a -0.24, b -0.09, c -0.03
    • True Meridian Transits: 17 37 12.77
    • Daily rate of Chron: -0.23
    • Chron. Error (H M S): 2 01 35.61
    • Weight: 1.000
    • Mean Chron. Error by Weights (H M S): 2 01 35.59
    • Probable Error (Mean Chron): 0.036
    • Right Ascension (H M S): 19 38 48.36
  • 57 Sagittarii
    • Observed Times (Wires 1-5): 38.6 51.3 04.8 18.0 31.0
    • Reduction to Mean Wire: 17 43 04.74
    • True Meridian Transits: 17 43 04.76
    • Right Ascension (H M S): 19 44 40.35
  • Moon I.
    • Observed Times (Wires 1-5): 23.5 37.0 50.5 04.2 17.7
    • Reduction to Mean Wire: 17 56 50.58
    • True Meridian Transits: 17 56 50.61
    • Right Ascension (H M S): 19 58 26.20
    • Probable Error (RA): 0.111
    • Longitude East: 11 39 55.12
    • Probable Error (Lon): 5.6
    • Weight (Lon): 0.829

Oct. 3

  • Capricorni
    • Observed Times (Wires 1-5): 38.9 52.0 04.7 17.6 30.5
    • Reduction to Mean Wire: 18 57 04.74
    • Instrumental Errors: c -0.05
    • True Meridian Transits: 18 57 04.72
    • Right Ascension (H M S): 20 58 40.30
  • Capricorni
    • Observed Times (Wires 1-5): 01.2 14.0 27.0 40.1 52.8
    • Reduction to Mean Wire: 19 13 27.02
    • True Meridian Transits: 19 13 27.00
    • Right Ascension (H M S): 21 15 02.58

Oct. 5

  • Capricorni
    • Observed Times (Wires 1-5): 39.5 52.3 18.0 31.0 01.8
    • Reduction to Mean Wire: 18 57 05.19
    • Instrumental Errors: a -0.22, b -0.04, c -0.03
    • True Meridian Transits: 18 57 05.17
    • Daily rate of Chron: -0.72
    • Chron. Error (H M S): 2 01 35.17
    • Weight: 0.928
    • Mean Chron. Error by Weights (H M S): 2 01 35.10
    • Probable Error (Mean Chron): 0.036
    • Right Ascension (H M S): 20 58 40.27
  • Capricorni
    • Observed Times (Wires 1-5): 01.6 14.8 27.3 40.5 53.3
    • Reduction to Mean Wire: 19 13 27.50
    • True Meridian Transits: 19 13 27.48
    • Right Ascension (H M S): 21 15 02.57
  • Moon I.
    • Observed Times (Wires 1-5): 58.1 11.6 24.9 38.1 51.0
    • Reduction to Mean Wire: 19 48 24.74
    • True Meridian Transits: 19 48 24.71
    • Right Ascension (H M S): 21 49 59.78
    • Probable Error (RA): 0.111
    • Longitude East: 11 39 52.98
    • Probable Error (Lon): 6.2
    • Weight (Lon): 0.677
  • Aquarii...
    • Observed Times (Wires 1-5): 44.1 57.1 09.8 22.7 35.1
    • Reduction to Mean Wire: 20 41 09.82
    • Instrumental Errors: c -0.09
    • True Meridian Transits: 20 41 09.83
    • Right Ascension (H M S): 22 42 44.88


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VUW Te Waharoa — PDF NZ Gazette 1871, No 12




✨ LLM interpretation of page content

🎓 Correspondence and Results of Longitude Observations at Hutt Observatory (1870) (continued from previous page)

🎓 Education, Culture & Science
1 November 1860
Longitude, Hutt Observatory, Meridian Transits, Surveying, Instrument calibration, Troughton and Simms