2MASS J09210122+351742

SpTypes: L6.5+T?
Distance: 20.1 pc
Kmag total: 13.9 => 14.5+14.8
Last Measured Sep: Unresolved!!
Last Measured PA: Unresolved!!

Observing Information - NIRC2

• filter = H
• Camera = Narrow
• sampmode = 3x8
• tint = 30 sec x 4 coadds
• dither patter = bxy3 2.5 2.5 n=3 (n can be lowered if not enough time)



DSS Optical Finding Chart	Keck LGS-AO Tool Finding Chart


Finding charts are north up and are 3' on a side.

Tip/Tilt star USNO-B1.0 1252-0171182 (R = 11.8) = Source #1, marked with green box


Airmass plot for May 29 (also shows airmass of SgrA*)