P/1999 R1 (SOHO) was recovered in SOHO LASCO C2 images by B. Zhou. The Kracht 2 orbital group comet was at perihelion on the 7th September, 2011. Orbital period is 4.0 years.
The comet faded as quickly as it brightened, and soon became too faint for SOHO's instruments to see it. Estimates show that P/2007 R5 (SOHO) is probably only 100-200 metres in diameter. Given how small and faint this object is, and how close it still is to the Sun, it is an extremely difficult target for observers on Earth to pick out in the sky.
Comet P/1999 R1 = 2003 R5 = 2007 R5 (SOHO) This comet was discovered by Bo Zhou on September 10, 2007 on real time images transmitted by the coronagraph C2 of the SOHO satellite. Sebastian Hönig (2006, Astron. Astrophysics. 445, 759) had previously announced the perihelion return of the comet C/2003 R5 (SOHO), and confirmed the identity with the comet C/1999 R1 (SOHO). The orbital elements of the comet P/2007 R5 (SOHO) indicated perihelion on September 11, 2007 at a distance of 0.0537196 AU from the Sun, and a 3.99 years period.