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Observations of Flamsteed and Bradley, 1690 - 1770

Reference Code: GBR/0180/RGO 4/147

Scope and Contents

Examination of John Flamsteed and James Bradley's observations, primarily by John Howe.

1. Distances from the Pole Star to the Pole based on observations by Tycho Brahe in 1583 and by Flamsteed in 1690, compiled by Howe, 31 May 1708.

2. The precession of the equinox inferred from Flamsteed's 1690 observations, compiled by Howe, 13 December 1770.

3. Apparent right ascension of the star Alpha Aquilae, 1753-1756, and other stars.

4. A star catalogue showing proper motions of the stars.

5. Investigations into measurements made by Tycho Brahe, c. 1583, making allowance for errors, refraction and aberration, computed by Howe, 8 April 1767.

6. Right ascensions of various stars, 1 January 1758.

7. Comparison of Howe's tables of the Sun with Bradley's observations, 1743-1759, and also the motion of the Sun, 1764.

8. Zenith distances cleared of errors from refractions, 1753-1754.

9. Solstitial zenith distance of the Sun, reduced and corrected.

10. Right ascension of the star Alpha Aquilae, 1753-1754, and the proper motions of stars, 1767.

11. Errors in the equation of the Sun caused by Venus.

12. Various notes on other astronomers' observations, with a list of stars with peculiar motions.

13. Differences in star positions between Flamsteed and Bradley's observations.

14. Corrections to Flamsteed's stars; Rømer's star catalogue, 1706 (the Triduum); and observational technique.

15. Errors of Flamsteed's mural quadrant; right ascension of the Sun, 1690; and corrections and verification of previous observations.

16. Chronology of observations performed by Howe and Bradley.

17. 'To find longitude at sea', various methods suggested by Thomas Hazelden of Wapping in a letter to James Hodgson, 28 August 1728.


  • Creation: 1690 - 1770


Conditions Governing Access

From the Management Group:

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1 folder(s) (1 folder)

Language of Materials


Former / Other Reference


Finding aid date

2005-11-07 09:39:24+00:00

Includes index.

Repository Details

Part of the Cambridge University Library Repository

Cambridge University Library
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Cambridge CB3 9DR United Kingdom