1694 Kaiser

1694 Kaiser
Discovery [1]
Discovered by H. van Gent
Discovery site Johannesburg Obs.
(Leiden Southern Station)
Discovery date 29 September 1934
Designations
MPC designation 1694 Kaiser
Named after
 Frederik Kaiser
(astronomer)[2]
1934 SB · 1960 SD
main-belt · (inner) [3]
Orbital characteristics [1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 80.88 yr (29542 days)
Aphelion 3.0145 AU (450.96 Gm)
Perihelion 1.7756 AU (265.63 Gm)
2.3951 AU (358.30 Gm)
Eccentricity 0.25862
3.71 yr (1353.9 d)
325.65°
0° 15m 57.276s / day
Inclination 11.102°
13.421°
356.19°
Earth MOID 0.773821 AU (115.7620 Gm)
Jupiter MOID 2.44131 AU (365.215 Gm)
Jupiter Tisserand parameter 3.459
Physical characteristics
Dimensions 13.84±1.27 km[4]
15.678±0.175 km[5]
28.42 km (calculated)[3]
13.02 h (0.543 d)[1][6]
13.23±0.02 h[7]
9 h[lower-alpha 1]
0.241±0.046[4]
0.1659±0.0088[5]
0.057 (assumed)[3]
B–V = 0.735
U–B = 0.415
Tholen = GC
C [3]
11.46

    1694 Kaiser, provisional designation 1934 SB, is an eccentric, carbonaceous asteroid from the inner regions of the asteroid belt, roughly 16 kilometers in diameter. It was discovered by Dutch astronomer Hendrik van Gent at the Leiden Southern Station, annex to the Johannesburg Observatory in South Africa on 29 September 1934.[8]

    The asteroid orbits the Sun at a distance of 1.8–3.0 AU once every 3.71 years (1,354 days). Its eccentric orbit of 0.26 is inclined by 11 degrees towards the plane of the ecliptic. The GC-/C-type asteroid has a noticeably high geometric albedo of 0.241±0.046 and 0.1659±0.0088, determined by the Akari and NEOWISE surveys, respectively, while the Lightcurve Database project assumes a much lower value of 0.06.[3][4][5]

    Photometric observations in 2006 at the Palmer Divide Observatory in Colorado (see video in § External links) were used to generate a light-curve with a period of 13.23±0.02 hours and a variation in brightness of 0.13±0.02 magnitude.[7] A refined observation in 2012 gave a period of 13.02±0.01 hours with a higher amplitude of 0.32.[6]

    The asteroid was named in honor of Dutch astronomer Frederik Kaiser (1808–1872), the director of the Leiden Observatory from 1837–1872. He founded the new Leiden Observatory and stimulated Dutch astronomical research. Frederick Kaiser is also honored by the lunar and Martian craters Kaiser.[2] Originally, the asteroid was erroneously named Kapteyn (MPC 2822), and only later it was noticed that the Duch astronomer Jacobus Kapteyn was already honored by the minor planet 818 Kapteynia.

    References

    1. ↑ CALL (2011web) gives a rotation period of 9 hours. Summary figures at LCDB Data for (1694) Kaiser
    1. 1 2 3 "JPL Small-Body Database Browser: 1694 Kaiser (1934 SB)" (2015-08-17 last obs.). Jet Propulsion Laboratory. Retrieved 22 April 2016.
    2. 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1694) Kaiser. Springer Berlin Heidelberg. p. 135. ISBN 978-3-540-29925-7. Retrieved November 2015.
    3. 1 2 3 4 5 "LCDB Data for (1694) Kaiser". Asteroid Lightcurve Database (LCDB). Retrieved November 2015.
    4. 1 2 3 Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved November 2015.
    5. 1 2 3 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved November 2015.
    6. 1 2 Warner, Brian D. (April 2013). "Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2012 September - 2013 January". The Minor Planet Bulletin 40 (2): 71–80. Bibcode:2013MPBu...40...71W. ISSN 1052-8091. Retrieved November 2015.
    7. 1 2 Warner, Brian D. (September 2006). "Asteroid lightcurve analysis at the Palmer Divide Observatory - late 2005 and early 2006". The Minor Planet Bulletin 33 (3): 58–62. Bibcode:2006MPBu...33...58W. ISSN 1052-8091. Retrieved November 2015.
    8. ↑ "1694 Kaiser (1934 SB)". Minor Planet Center. Retrieved November 2015.

    External links


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