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Contact information

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

Ursa Astronomical Association

679 Pax - 23.4.2022 at 23.01 - 23.4.2022 at 23.13 Orimattila, Artjärvi, Tähtikallio Observation number 106834

Visibility III / V


The asteroid in the central zone of the 679 Pax (A909 BR, 1909FY, 1973 QD) main zone was photographed on the second night of the April 2022 work. The asteroid was discovered by the German astronomer August Kopff (1882-1960) on January 28, 1909 at the Heidelberg Observatory. August Kopff has found comets 22P / Kopff and C / 1906 E1 and 68 asteroids. The asteroid is named after the Roman mythology of the peace god Pax. Pax also refers to peace, in the time of Augustus peace was also called Pax Romana which lasted a total of 27ea - 180 (207 years). Source Wikipedia https://en.wikipedia.org/wiki/Pax_Romana . The size of the asteroid is 63.90km and the rotation speed is 8.452h / r. Spectrum class spec_T => I, spec_B => K. There is a 3D model https://3d-asteroids.space/asteroids/679-Pax . When photographed, the asteroid was at a distance of 2.5790au and the closest on March 28, 2022 to 2,486au.

1Picture. first image in the series1 L60s measured, 2022-04-23T 20: 01: 28UT 2459693.33435JDUT 13h04m37.47s + 28d27'04.9 "14.381mag Std Dev 631.399 SNR65.797 FWHM2.953", JPL Horizon 20: 01: 28UT 13h04m37.43s + 28d27'04.7 "14.600mag.

2Picture. last image in series 11 L60s measured, 2022-04-23T 20: 12: 25UT 2459693.34195JDUT 13h04m37.09s + 28d27'05.0 "14.376mag Std Dev 1451.710 SNR154.403 FWHM2.952", JPL Horizon 20: 12: 25UT 13h04m37.06s + 28d27'04.9 "14.600mag.

3Picture sum view of L60s 1-11 image stack, motion is displayed. No other asteroids under 21.8 mag are shown.

TYC 1995-2172-1 v.12.42mag stars used to calibrate brightness measurement.


Additional information
  • Observation target
    • Asteroid
  • Name of the observation target
    • 679 Pax
  • Seeing
    • Average
Technical information

Alluna RC16, C415 / 3320, Moravian G4-16000EC MkII, filter L, bin3 11 x 60s

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