Example Curves from Part A  

 

All magnitudes in the text and plots refer to the Hipparcos Hp magnitude scale.

Different plot symbols are described in Volume 1.

Further details of each object are contained in the Variability Annexes.

 

 

HIP 23743 (HD 32357, BM Cam). This star is of spectral type K0III. It varies between about 6.20 and 6.28 magnitudes, with a period of about 80.9 days. It is classified as an RS Can Ven type (eruptive) variable. The Hipparcos observations indicate that it is probably a binary, because the position of the star's photocentre changes with the amplitude. The star is at a distance of about 190 parsecs.
  
HIP 28360 (HD 40183, Beta Aur). This star is of spectral type A2V. It varies between about 1.89 and 1.98 magnitudes, with a period of 3.96004 days. It is classified as an EA type (Algol-type) eclipsing binary - the sharp and well-defined minima are caused by eclipses. The star is at a distance of about 25 parsecs. 
HIP 28456 (HD 40632, DN Ori). This star is of spectral type A2. It varies between about 9.21 and 9.29 magnitudes, with a period of 12.96641 days. It is classified as an Algol-type eclipsing binary.
HIP 48188 (HD 85207, XX Ant). This star is of spectral type A8/F0V. It varies between about 8.68 and 9.23 magnitudes, with a period of 0.888021 days. It is classified as an Beta Lyrae type eclipsing binary. The star is at a distance of about 250 parsecs.
HIP 53806 (HD 95492, V359 Vel). This star is of spectral type B9V. It varies between about 7.58 and 7.84 magnitudes, with a period of 4.5350 days. It is classified as an Algol-type eclipsing binary. This is one of the 343 new eclipsing binaries discovered by Hipparcos.
HIP 59683 (HD 106400, AH Vir). This star is of spectral type K2V. It varies between about 9.19 and 9.92 magnitudes, with a period of 0.407528 days. It is classified as a W Ursae Majoris-type eclipsing binary. The star is at a distance of about 100 parsecs.
HIP 60455 (HD 107805, R Cru). This star is of spectral type F7Ib. It varies between about 6.483 and 7.318 magnitudes, with a period of 5.8257 days. It is classified as a Delta Cephei-type pulsating variable. The errors on the measured magnitudes are invisible on this plot.
HIP 65835 (HD 117287, R Hya). This star is of spectral type M6. It varies between 4.314 and 7.029 magnitudes, and therefore varies between being visible and invisible to the naked eye. It a period of about 384 days. It is classified as a Mira Ceti type variable.
HIP 97649 (HD 187283). This star is of spectral type A7IV. It varies between about 0.82 and 0.869 magnitudes, with a period of about 7.945 days. It is classified as an Algol-type eclipsing binary. Although one of the brightest stars in the sky, its variability (and eclipsing binary nature) was unknown before its discovery by Hipparcos.
HIP 100859 (HD 195068, V2121 Cyg). This star is of spectral type F0V. It varies between about 5.74 and 5.84 magnitudes, with a period of 0.799678 days (its period was determined with an accuracy of a few seconds). It is classified as an RR Lyrae type pulsating variable. The discovery of its variability, and its classification as an RR Lyrae variable, was made by Hipparcos.