UBV photometry of the asteroid 44 Nysa
Institute of Astrophysics, Tajik Academy of Sciences, and Isaac Newton Institute of Chile, Tajikistan Branch, Bukhoro Str. 22, Dushanbe 734042, Tajikistan
Corresponding author: fiza@ac.tajik.net
Received:
10
June
2002
Accepted:
30
April
2003
The color curves of Nysa connected to the rotation and phase angle were obtained from observations
for the first time in 1982. The color curves showed the 
change with rotation. The value of this change was
0.2 mag. Color variation indicates that the extended color spot is on the surface of 44 Nysa. The color index
decreases with the increase of the phase angle (the phase coefficient is 0.011 mag/deg). This decrease is stronger
for the surface with color spots. Phase functions of the brightness for opposite sides of Nysa are different. The
value of the opposition effect of 44 Nysa decreases as reflectance decreases.
Key words: minor planets, asteroids / star system: general / techniques: photometric
© ESO, 2003