| RGO Archives/RGO 45 contains: |
|---|
| <-- See earlier |
|---|
| 145 |
Comet Arend-Roland 1956h |
| 146 |
'Comet Giacobini-Zinner' |
| 147 |
Cometary Aphelia |
| 148 |
Conjunctions of Neptune with a star |
| 149 |
The False Dawn |
| 150 |
Gravitation Effects-Orbits and Escape |
| 151 |
Local Circumstances of a Partial Solar Eclipse |
| 152 |
Occultations and Eclipses of Iapetus |
| 153 |
Predictions of Periodic Comets |
| 154 |
On the presentation of elements of comets and ephemerides |
| 155 |
Refraction at Low Altitudes |
| See later --> |
|---|
|
Papers of John Guy Porter
| Title |
Papers on Special Perturbations |
| Reference |
RGO 45/160 |
| Extent and Medium |
14 pages |
|
| Content and context |
Notes and tables on Special Perturbations written by Porter in connection with his work on methods of comet orbit calculation at the N.A.O. |
| No further on-line information. |
|
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