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  • Eclipsing binaries drop down list
    • AB Andromedae
    • AC Bootis
    • AD Andromedae
    • AI Draconis
    • AK Herculis
    • AP Leonis
    • AR Lacertae
    • ASAS J192916+4637.3
    • AW Lacertae
    • AZ Cassiopeiae
    • BB Cephei
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    • BF Aurigae
    • BM Cassiopeiae
    • BM Orionis
    • BX Andromedae
    • CD Andromedae
    • CM Lacertae
    • CQ Aurigae
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    • DM Persei
    • DO Cassiopeiae
    • DS Andromedae
    • EE Cephei
    • EE Pegasi
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    • EG Cephei
    • EI Cephei
    • EO Aurigae
    • ER Orionis
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    • GK Cephei
    • GO Cancri
    • HL Aurigae
    • IM Aurigae
    • IQ Persei
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    • IY Aurigae
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    • KU Cygni
    • LW Puppis
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    • LY Delphini
    • NO Leonis
    • NS Draconis
    • OT Bootis
    • OW Geminorum
    • RS Canum Venaticorum
    • RW Geminorum
    • RW Tauri
    • RX Cassiopeiae
    • RX Herculis
    • RZ Cassiopeiae
    • RZ Comae Berenices
    • RZ Eridani
    • RZ Ophiuchi
    • S Equulei
    • ST Aquarii
    • SU Aquarii
    • SV Camelopardalis
    • SW Lacertae
    • SX Aurigae
    • SX Cassiopeiae
    • SY Andromedae
    • SZ Piscium
    • TT Aurigae
    • TU Lyncis
    • TV Cassiopeiae
    • TW Andromedae
    • TW Cancri
    • TW Cassiopeiae
    • TW Draconis
    • TX Cassiopaiae
    • TX Ursae Majoris
    • TZ Lyrae
    • U Cephei
    • U Coronae Borealis
    • U Ophiuchi
    • u Herculis
    • UU Cancri
    • UV Leonis
    • UZ Cygni
    • UZ Leonis
    • V346 Aquilae
    • V367 Cygni
    • V 371 Cygni
    • V448 Cygni
    • V451 Ophiuchi
    • V453 Cygni
    • V477 Cygni
    • V505 Monocerotis
    • V523 Cassiopeiae
    • V530 Cygni
    • V566 Ophiuchi
    • V698 Cygni
    • V836 Cygni
    • V1171 Cygni
    • V1425 Cygni
    • V1765 Cygni
    • V2483 Cygni
    • V3288 Ophiuchi
    • V Serpentis
    • VW Cephei
    • W Serpentis
    • W Ursae Majoris
    • WW Aurigae
    • WY Cancri
    • X Trianguli
    • XY Sagittarii
    • Y Cygni
    • Z Herculis
    • ZZ Cancri
    • ZZ Cephei
  • Other light curves drop down list
    • BE Serpentis
    • chi Cygni
    • GW Ursae Majoris
    • HD189733
    • HP Lyrae
    • NSV 12716
    • RU Sextantis
    • V1423 Cygni
    • V3908 Sagittarii
    • V5102 Sagittarii
  • Discoveries drop down list
    • GSC 02259-00741
    • GSC 02259-00970
    • GSC 02664-00187
    • GSC 02664-00763
    • GSC 02679-00311
    • GSC 02681-01041
    • GSC 02683-02642
    • GSC 02699-00921
    • GSC 02763-02208
    • GSC 02764-00623
    • GSC 02907-00103
    • GSC 02916-00275
    • GSC 02916-01167
    • GSC 02924-02382
    • GSC 03362-01863
    • GSC 03481-01448
    • GSC 03653-00917
    • GSC 04024-00551
    • GSC 04024-01267
    • HD 227877
    • HD 332629
  • Light pollution
  • Observing Eclipsing Binaries Using Remote Observatories

TW Cassiopeiae / TW Cas

Light curve and phase diagram of the EA type eclipsing binary TW Cassiopeiae / TW Cas.  This was constructed from photometry of 30 images taken by the Bradford Robotic Telescope Cluster Camera (BRT) between 12 October 2014 and 1 October 2016.

Picture

The following phase diagram was constructed from these observations.
​
Picture
The period of 1.428361 d was the best fit to this data, which compares well with 1.428324 d from the AAVSO VSX and 1.428334 d from Kreiner.

On November 28 2016 I obtained the following light curve using the 2" refractor at Somerby Observatory.  (The fade was missed due to cloud.)
​
Picture
Picture


​The time of minimum obtained from this eclipse was
​HJD 2457721.3891.


A secondary minimum was observed from Somerby on 28 December 2017.
Picture

Combining the BRT and Somerby data, after adjusting the zero point of the BRT data 'by eye' to better fit the ccd data (by -0.03 mag), produced the following light curve and phase diagram.  I intend to observe a complete primary eclipse in the near future!
​
Picture
Picture

1999 visual observation, using 15x80 binoculars.
Picture

Combining visual (red) and ccd (black) observations.  Here, the visual magnitudes were adjusted 'by eye' (by -0.174 mag) to better fit the ccd results.
Picture
Picture

Comining BRT (black) ccd (red) and visual (blue) observations;
Picture
Picture

​[Page updated 3 January 2018]
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