Contact information

Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

2004 TP1 - 10.4.2021 at 23.29 - 10.4.2021 at 23.48 Orimattila, Artjärvi, Tähtikallio Observation number 97654

Visibility IV / V

The asteroid Apollo / NEO / PHA was photographed on the second night of the April 2021 campaign. The asteroid was discovered by the Lowel Observatory's LONEOS exploration program (699) on October 5, 2004. Overall estimate with asteroid 280m. When photographed, the asteroid was at a distance of 0.0579au and the nearest April 8, 2021 0.05541au. The weather was excellent during filming, filming began during astronomical twilight. The start of shooting 5X60s and finally the sum of 20X30s shows the interval between shots.
1Picture. First image measured, 2021-04-10T 20: 29: 31UT 2459315.35383JDUT 10h16m36.82s + 40d54'48.3 "16.637mag Std Dev 51.667 SNR11.783 FWHM8.858", JPL Horizon 20: 29: 31UT 10h16m36.26s + 40d54 ' 55.4 "16.564 mag.
2Picture. Last image measured, 2021-04-10T 20: 47: 31UT 2459315.36633JDUT 10h16m51.78s + 40d50'43.7 "16.896mag Std Dev 42.788 SNR10.226 FWHM6.910", JPL Horizon 20: 47: 31T 10h16m51.42s + 40d50 ' 47.5 "16.564 mag.
3Picture. Summary image of the stack, very fast movement is visible. No other asteroids below 20.8mag. TYC 3004-1030-1 v.11.15mag stars used to calibrate the brightness measurement.

Additional information
  • Observation target
    • Asteroid
  • Name of the observation target
    • 2004 TP1
    • Näyttävä
  • Seeing
    • Excellent
Technical information

Alluna RC16, C415 / 3320, Moravian G4-16000EC MkII, filter L, bin3 5x60s and 20x30s

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