Newest observations

Contact information

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

Ursa Astronomical Association

1552 Bessel - 14.9.2019 at 00.56 - 14.9.2019 at 01.16 Orimattila, Artjärvi, Tähtikallio Observation number 85786

Visibility III / V


1552 Bessel (1938 DE1.1933 FJ1.1948 EH, 1951 UF) The asteroid on the outer edge of the main zone was photographed on the first night of the September 2019 work. Finland 100 The target of our project was 177. The asteroid of the family was discovered by Yrjö Väisälä on February 24, 1938 in Iso-Heikkilä, Turku. The asteroid is named after the German mathematician astronomer Friedrich Wilhelm Bessel (1784-1846). Bessel is especially known for the first gauges of stellar e.g. 61 Gygni parallax. Friedrich Bessel was invited to join several science academies despite having no formal university education, source Wikipedia https://en.wikipedia.org/wiki/Friedrich_Bessel . Brief introduction in Finnish, Wikipedia https://en.wikipedia.org/wiki/Friedrich_Bessel . There is a 3D Image of the asteroid. https://space.frieger.com/asteroids/asteroids/1552-Bessel .The size of the asteroid is 18.51km and the rotational speed is 8.996h / r. 1Picture. Stack of 1-2 images measured, 2019-09-13T 21: 55: 37UT 2458740.41362JDUT 01h01m26.11s + 05d53.2 "14.7mag Std Dev 1417.734, JPL Horizon 21: 55: 37UT 01h01m26.11s + 05d47'52.1" 15.55mag .
2Picture. Stack of 19-20 images measured, 2019-09-13T 22: 16: 15UT 2458740.42795JDUT 01h01m25.53s + 05d47'51.8 "14.5mag Std Dev 1388.777, JPL Horizon 22: 16: 15UT 01h01m25.53s + 05d47'51.6" 15.55mag .
3Picture. sum view of the stack, motion is shown. The picture shows asteroid (16278) 2000 JM77 17.4mag, motion is shown. Asteroid ((115987) 2003 WA62 18.7mag found Asteroid 28527 Kathleenrose 18.24 not sure?
#Suomi100asteroidit


Additional information
  • Observation target
    • Asteroid
  • Name of the observation target
    • 1552 Bessel
    • Keskitaso
  • Seeing
    • Average
Technical information

Alluna RC16, C415 / 3320, SBIG 1001E, filter L, 20 x 60s

Send a comment

Comments are checked and moderated before publication If you want to contact the observer directly about possibilities to use these images, use the Media -form.

*

*

*
characters left

By sending in this comment I confirm, that I've read and understood the the observation system's privacy policy.