Dear Colleagues - We have submitted the following for inclusion in the next IAUC. R. Jain and C. Bailyn (Yale); M. Garcia and K. Rines(CfA); A. Levine (MIT); J. Espinoza and D. Gonzalez (CTIO) report YALO consortium observations using the Yale 1-m telescope at CTIO and observations with the 48" telescope at the Whipple Observatory: "Aql X-1 = V1333 Aql appears to be beginning a new outburst. This x-ray binary outbursts approximately once per year, and based in its recent outbursts was due to erupt. We have monitored the optical counterpart of the soft X-ray transient Aquila X-1 since early March in Johnson R using the YALO 1-m telescope. Compared to the average quiescent level, which has a fluctuation of less than 0.1 magnitudes, the source had brightened in R by approximately 0.2 magnitudes on MJD 51306.4 (May 08.3 UT). During the night of May 10.2 -- 10.38 UT, we obtained 5 data points spanning nine hours and found that the brightness increased from 0.4 to 0.55 magnitudes brighter than the quiescent average. V-band data from the 48" telescope at the Whipple Observatory show similar increases. We find that by MJD 51307.5 (May 09.5 UT) the source had brightened by approximately 0.4 magnitudes in V, compared to the average quiescent level. Subsequently we obtained 3 YALO V images on May 10.2 -- 10.38 UT and found an increase in brightness of approximately 0.45 to 0.6 magnitudes, again compared to the quiescent average. We will continue monitoring this source both in the optical and in the X-ray using RXTE. Observations at all wavelengths are encouraged."