Contact information

Skywarden,
Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki
taivaanvahti(at)ursa.fi

Ursa Astronomical Association

(55790) 1993 RP15 - 27.9.2019 at 23.32 - 27.9.2019 at 23.51 Orimattila, Artjärvi, Tähtikallio Observation number 86878

Visibility III / V


(55790) 1993 RP15 (1993 RP15,2001 XK2) The asteroid at the inner edge of the main zone was photographed on the first night of the Stormbongar event and extra work. The asteroid came into the picture when we photographed 2486 Metsähovi asteroids. The asteroid was discovered by Belgian astronomers Henri Debehogne and Eric Walter Elst on 15 September 1993 at the La Silla Observatory in southern Europe. Henri Debehogne has found a total of 741 asteroids, source Wikipedia https://en.wikipedia.org/wiki/Henri_Debehogne . Eric Walter Elst has found a total of 3868 asteroids, source Wikipedia https://en.wikipedia.org/wiki/Eric_Walter_Elst . The size of the asteroid is 5.29km. When photographing, the asteroid was at a distance of 1.31au and the closest asteroid on 12/09/2019 was 1.279au. 1Picture first image measured, 2019-09-27 20: 33: 31UT 2458754.35660JDUT 23h29m44.60s -04d21'24.7 "15.6mag Std Dev 214.238, JPL Horizon 20: 33: 31UT 23h29m44.55s -04d21'28.2" 17.56mag.
2Picture. last image measured, 20: 52: 17UT 2458754.36964JDUT 23h29m43.52s -04d21'24.3 "15.9mag Std Dev 135.287, JPL Horizon 20: 52: 17UT 23h29m43.55s -04d21'24.8" 17.56mag.
3Picture. sum view of the stack, motion is shown. Asteroids in the picture, 2486 Metsähovi 15.35mag motion is shown. Asteroid 171433 Prothous 19.7mag, next to a bright star hard to see! no other asteroids less than 19.9mag. TYC 5247-1025-1 v.11.87mag stars used to calibrate the brightness measurement.


Additional information
  • Observation target
    • Asteroid
  • Name of the observation target
    • (55790) 1993 RP15
    • Keskitaso
  • Seeing
    • Good
Technical information

Alluna RC16, C415 / 3320, SBIG 1001E, filter L, 10 x 120s

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