David's Astronomy Pages
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 Images (S256) |
 Images Sessions |
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 Images (S258) |
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Objects Session Notes
1685 Toro - Near Earth Asteroid (NEA) / Minor Planet Z And - variable star Astrometric & Photometric Monitoring
- SS Cyg (dwarf nova)
- BL Lac (Blazar)
- TZ Lyr, RX And, RU Peg (variables)
- Evening session (2.1hr), poor sky conditions, cloud developing. - CCD operation of -25 degC (at 72% average cooling). - main objective was to acquire images of certain selected stars of ongoing photometric and astrometric analysis, in particular SS Cyg and RX And - Secondary objective was to attempt images of 6.2 km diameter NEA 1685 Toro as it passes near earth at 76 LD. .
1685 Toro is a 6.2km diameter asteroid which is passing by the earth today (2008-01-24) at a distance of 76 lunar distance (LD). A short sequence of images of shows its relatively rapid apparent motion.
| 1685 Toro passing through star field in Cetus |
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CCD Image 15 x 20s exposure (average combine), 2x2 binning, C Filter 2008-01-24 19:30hUT (#257067-81) |
| 1685 Toro - detail |
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CCD Image 15 x 20s exposure (aligned on asteroid) 2x2 binning, C Filter 2008-01-24 19:30hUT (#257067-81) |
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| Z And (Andromeda) Second Brightening of Z And noted in photometric measurements of Z And on 2008-01-20 to 2008-01-24, (confirmed by further measurements on 2008-01-25) |
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| Earlier image of Z And |
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| Photometry V & B Bands |
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Images collected for Astrometric Monitoring
of Nearby Stars Project
Images collected for Photometric Monitoring
of Variable Stars
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| This Web Page: | CCD Images - Session 257 (2008-01-24) |
| Last Updated : | 2015-05-16 |
| Site Owner : | David Richards |
| Home Page : | David's Astronomy Web Site |
