|V1 - V2 - V3 - V4|
|Names||NGC 2261, Hubble's Variable Nebula|
|Right Ascension (2000.0)||06:39:09.5|
|Heliocentric Radial Velocity||...|
|Distance (esteem)||2,500 light years|
|Exposure time||6,000 seconds (20 x 300 exposures) with binning mode 2 x 2|
|CCD Camera||SBIG ST-8XE|
|Telescope||Meade Instruments Schmidt-Cassegrain 14" LX200 GPS|
|Focal length||3556 mm|
|Field of View||13.3 x 8.9 arcminute|
|Original scale||1.044 arcsecond / pixel|
|Palomar Observatory Sky Survey images|
|POSS I/E DSS1 Red|
|POSS I/O DSS2 Blue|
|POSS II/F DSS2 Red|
|POSS II/J DSS2 Blue|
|POSS II Color|
|Sloan Digital Sky Survey images|
|0.9-meter telescope Kitt Peak National Observatory image (1968)|
Here you can see the famous Hale Telescope's first light picture taken by Edwin Hubble on January 26, 1949. It was a 15 minute exposure under poor
seeing conditions that account for the large size of the stars.
While studying my picture, on January 22 2010, I noticed that the star USNO-A2.0 0975-03605809 has changed its position in respect of POSS I plates. I collected images from various sources back to the twenties (Mount Wilson 100-inch) to the more recent SDSS and can confirm the proper motion of this star. It's easily recognizable confronting
POSS I and POSS II images. The coordinates in the original USNO-A2 catalogue (epoch 1953.940) are:|
R.A. 06:39:05.689 Dec +08°45'40.77" (J2000).
Measuring the actual coordinates from my image I obtained:
R.A. 06:39:05.740 Dec +08°45'29.40" (J2000).
The movement seems to be approximately from North to South and is about 11.37" in 57 years. This yields a proper motion of approximately 0.2" per year. The name is NLTT 16798 and is listed as High Proper Motion Star.