original: David W. Dunham, The Minor Planet Bulletin, Volume 6, p. 13 - 14 (December 1978) ADS archive copy However, careful examination in 1993, using the Hubble Space Telescope, failed to locate a secondary.
simplifications: David Dunhams Minor Planet Bulletin, Volume 6, p. 13-14 archived it, but after careful study in 1993, The Hubble Space Telescope could not find another. The Hubble Space Telescope couldn't locate a secondary. However, careful examination in 1993 using the Hubble Telescope didn't find a secondary. The Hubble Space Telescope could not locate a secondary. David W. Dunham, The Minor Planet Bulletin, Volume 6, p. 13 - 14 (December 1978) ADS archive copy: However, a careful search using the Hubble Space Telescope in 1993 failed to find a secondary. The Hubble Telescope could not find a second after a thorough search in 1993. Careful examination with the Hubble Space Telescope could not locate a secondary. Despite looking carefully in 1993 with the Hubble Space Telescope they could not find a secondary. David W. Dunham published in The Minor Planet Bulletin, Volume 6, p. 13 - 14  on December 1978. After careful examination with the Hubble Space Telescope in 1993 a secondary was not found. David W. Dunham, The Minor Planet Bulletin, Volume 6, p. 13 - 14 (December 1978) ADS archive copy However, careful examination using the Hubble Space Telescope in 1993, failed to locate a secondary.