The number of astronauts on board were seven.
The date of launch was the 16th which adds up to seven.
The total number of days of the mission was 16.
The explosion took place 16 minutes before touchdown.
The scheduled arrival time of Columbia (according to Indian Standard Time [GMT + 5.50]) was 7:45 pm.
The spaceship lasted contacted NASA at 7:27 pm (IST).
Columbia exploded at 9:43 am Texas time.
Kalpana had seven letters in her name and she was 43.
Her date of birth was Jan 7, 1961. (01/07/1961).
