[vsnet-alert 9757] V1413 Aql in an eclipse

[Ohshima]

V1413 Aql in decline

 V1413 Aql, one of symbiotic stars, seems to be in decline.
 Since this star shows eclipses, this may probably be due to eclipsing.
 According to Munari (A&A 257,163(1992)),the element of eclipsing is

2446650+434.1*E

 This expression expects V1413 Aql to enter an eclipse around 28th of Dec,
2007. Given the 

Recent observations;
  20071004.806   134  (Eddy Muyllaert)
  20071004.828   135  (Gary Poyner)
  20071005.831   135  (Eddy Muyllaert)
  20071007.815   135  (Eddy Muyllaert)
  20071011.514   136  (Yutaka Maeda)
  20071012.813   134  (Eddy Muyllaert)
  20071013.815   134  (Eddy Muyllaert)
  20071014.815   134  (Eddy Muyllaert)
  20071017.803   134  (Eddy Muyllaert)
  20071017.808   134  (Gary Poyner)
  20071020.785   135  (Eddy Muyllaert)
  20071023.787   134  (Gary Poyner)
  20071028.817   134  (Gary Poyner)
  20071111.819   135  (Gary Poyner)
  20071114.756   135  (Gary Poyner)
  20071115.746   133  (Gary Poyner)
  20071123.778   134  (Gary Poyner)
  20071202.407  13.64V  (Hiroshi Itoh)
  20071210.722   135  (Gary Poyner)
  20071215.397  14.84V  (Hiroshi Itoh)
  20071216.740   137  (Gary Poyner)

The last eclipse observations;

  20060926.842   134  (Eddy Muyllaert)
  20061002.885   136  (Gary Poyner)
  20061007.821   140  (Gary Poyner)
  20061008.808   139  (Eddy Muyllaert)
  20061011.851   147  (Gary Poyner)
  20061012.826  <143  (Eddy Muyllaert)
  20061013.773   148  (Gary Poyner)
  20061013.813  <143  (Eddy Muyllaert)
  20061016.831  <143  (Eddy Muyllaert)
  20061017.851   150  (Gary Poyner)
  20061018.777  13.89C  (Vince Tuboly)
  20061021.769  <143  (Eddy Muyllaert)
  20061021.789   153  (Gary Poyner)
  20061024.758   153  (Gary Poyner)
  20061024.801  <143  (Eddy Muyllaert)
  20061027.819   152  (Gary Poyner)
  20061031.872   153  (Gary Poyner)
  20061101.801   152  (Gary Poyner)
  20061102.803   153  (Gary Poyner)
  20061103.781  <139  (Eddy Muyllaert)
  20061109.765   151  (Gary Poyner)
  20061115.794  <139  (Eddy Muyllaert)
  20061116.747   150  (Gary Poyner)
  20061117.757   149  (Gary Poyner)
  20061118.788  <139  (Eddy Muyllaert)
  20061119.758  <139  (Eddy Muyllaert)
  20061123.750   148  (Gary Poyner)
  20061125.762   145  (Gary Poyner)
  20061202.740   143: (Gary Poyner)
  20061208.724   138  (Gary Poyner)
  20061209.738   136  (Gary Poyner)
  20061209.741   137  (Eddy Muyllaert)
  20061216.733   134  (Gary Poyner)
  20061216.745   134  (Eddy Muyllaert)