NNo      GCVS          J2000.0            Type      Max        Min I         Min II       Epoch        Year      Period          M-m/D     Spectrum      References  Other desig. p.m.(as/yr)   Epoch     Ident.     New type    GCVS
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592116 |V2116 Oph *|173202.13 -244443.7 |XP        | 18.66   |  19.36     |            |V |            |     |                    |     |M6III+(cont+e)   |04128 09555|           |             |1996.678| |GSC2.2   |          |V2116 Oph |
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_______________Cross-identifications:_______________
V2116 Oph     = GX   001+04                   |     
V2116 Oph     = X    17289-247                |     
____________________________________________________

      Reference to a chart or photograph:
09555. A. Davidsen, R.Malina, S.Bowyer, ApJ 203, 448, 1976 {1976ApJ...203..448D}

      Reference to a study of the star:
04128. A. Davidsen, R.Malina, S.Bowyer, ApJ 211, 866, 1977 {1977ApJ...211..866D}

__________________________________________________________________
      Remark:         
    X-ray pulsar. The pulse period is decreasing: 135s (1971),
    112.076s (1979), 109.668s (1980) [09553]. The spin-period
    may be twice longer.

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