AAVSO Alert Notice 405:
Request for observations of NSV 99 (khi Peg) in support of HST observations
October 2, 2009
Dr. Brian Espey (Trinity College, Dublin, Ireland) has requested
photoelectric photometry and bright star CCD photometry of the semiregular variable NSV 99 (= khi Peg) beginning immediately. These observations are in support of ultraviolet spectroscopy to be obtained with the Hubble Space Telescope in late October and late November 2009. Observations are requested to continue through the end of November 2009.
Photoelectric observers are asked to obtain nightly V-band photometry of NSV 99 using the following comparison and check stars:
Comparison:
HR 22 (SAO 91734, “87 Peg”)
RA/Dec(J2000): 00:09:02.4247 , 18:12:43.067
V=5.532, (B-V)=1.038 (Mermilliod and Mermilliod 1998)
Check:
HR 131 (SAO 74084, “52 Psc”)
RA/Dec(J2000): 00:32:35.4859 , 20:17:39.539
V=5.367, (B-V)=1.069 (Mermilliod and Mermilliod 1998)
Note that these stars will not appear on VSP-generated charts smaller than A scale. Both comparison and check stars are several degrees away, so please try to observe as close to the meridian as possible. DSLR observers and wide-field CCD observers should use the same comparison and check stars as above. There are few suitable near-field comparison stars, so standard CCD imaging is not recommended.
When submitting CCD or DSLR data, please be clear as to what comparison stars you use.
NSV 99 (= khi Peg) is located at the following (J2000) coordinates:
RA,Dec: 00:14:36.20 , +20:12:24.0
Finder charts for NSV 99 may be plotted using VSP:
http://www.aavso.org/observing/charts/vsp/index.html?pickname=NSV%2099
Note that NSV 99 is itself a comparison star used for visual observing, so the chart will have a “48” label next to the star.
Please submit observations to the AAVSO using either of “NSV 99″ or”KHI PEG”.
This AAVSO Alert Notice was prepared by M. Templeton.
SUBMIT OBSERVATIONS TO THE AAVSO
Information on submitting observations to the AAVSO may be found at:
http://www.aavso.org/observing/submit/
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Ya know. I thought the Hubble space telescope could see galaxies hundreds of light years away. First. Why dont they point it at the moon and thus, prove we were there. And, why cant we use ie to see what is in our own galaxy ? I mean if it can see light years. it should be able to find a penny on the suface of mars , Right ? Why arent we using hubble for that ? I need to know.
If you pointed the HST at the Moon, the light would burn out the camera sensor. Hubble is designed for imaging very low light objects, not ones that will blind it. Try looking at a bright moon through a high-powered telescope and you too will be blinded by it – at least when you take your eye away from the telescope you won’t be able to see anything in the dark except the Moon’s after image. Hubble doesn’t have the restorative properties of the human eye. Once it’s blinded it stays that way unless someone goes up and fixes it.
Second, even if the HST could be pointed at the Moon and suffer no damage to its detectors, a telescope’s sensitivity is determined by how large its mirror is. A larger mirror can distinguish smaller angular separations. Now, even though the things left on the moon are large, the moon is far away, so those things look very small. Remember that the Hubble telescope is not that far above the Earth, so it really isn’t significantly closer to the moon than we are. Anyway, for the size of telescope and the distance to the moon, the smallest things Hubble could pick up are about the size of a football field. So this telescope couldn’t see the lunar modules even if it WAS pointed at the moon.