1719 Jens

1719 Jens
Discovery [1]
Discovered by K. Reinmuth
Discovery site Heidelberg Obs.
Discovery date 17 February 1950
Designations
MPC designation 1719 Jens
Named after
 Jens
(grandson of discoverer)[2]
1950 DP · 1939 PP
1939 TD · 1941 BB
1948 RQ · 1948 RS1
1948 TS1 · 1961 TZ1
A922 SC
main-belt · (middle) [3]
Orbital characteristics [1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 67.52 yr (24661 days)
Aphelion 3.2465 AU (485.67 Gm)
Perihelion 2.0666 AU (309.16 Gm)
2.6566 AU (397.42 Gm)
Eccentricity 0.22207
4.33 yr (1581.5 d)
184.95°
0° 13m 39.468s / day
Inclination 14.282°
323.45°
58.105°
Earth MOID 1.10311 AU (165.023 Gm)
Jupiter MOID 2.37061 AU (354.638 Gm)
Jupiter Tisserand parameter 3.309
Physical characteristics
Dimensions 18.93 km[4]
19.914±0.070 km[5]
19.77±0.76 km[6]
18.80 km (derived)[3]
Mean radius
 9.465 ± 0.45 km
5.87 h (0.245 d)[1][7]
5.867±0.005 h[8]
5.873±0.005 h[9]
5.87016±0.00005 h[10]
0.1489[4]
0.1348±0.0306[5]
0.137±0.021[6]
0.1145 (derived)[3]
0.1489 ± 0.015[1]
S [3]
11.6

    1719 Jens, provisional designation 1950 DP, is a stony asteroid from the middle region of the asteroid belt, about 19 kilometres (12 miles) in diameter. It was discovered by German astronomer Karl Reinmuth at Heidelberg Observatory on 17 February 1950.[11]

    The S-type asteroid orbits the Sun at a distance of 2.1–3.2 AU once every 4 years and 4 months (1,583 days). Its orbit shows an eccentricity of 0.22 and is tilted by 14 degrees to the plane of the ecliptic. It has a rotation period of 5.9 hours and an albedo of about 0.13, according to surveys carried out by IRAS, WISE and NEOWISE.[4][5][6]

    The minor planet was named by the discoverer after his grandson, Jens. Reinmuth also named the consecutively numbered asteroid, 1720 Niels, after one of his grandsons.[2]

    In 2010, NASA's WISE satellite photographed the asteroid passing in front of the Tadpole Nebula.[12]

    1719 Jens tracks across this image of the Tadpole Nebula, seen as a line of yellow-green dots near centre.

    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 1719 Jens (1950 DP)" (2015-05-10 last obs.). Jet Propulsion Laboratory. Retrieved 22 April 2016.
    2. 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1719) Jens. Springer Berlin Heidelberg. p. 136. ISBN 978-3-540-29925-7. Retrieved November 2015.
    3. 1 2 3 4 "LCDB Data for (1719) Jens". Asteroid Lightcurve Database (LCDB). Retrieved November 2015.
    4. 1 2 3 Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. Bibcode:2004PDSS...12.....T. 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 3 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; Cabrera, M. S. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters 759 (1): 5. arXiv:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved November 2015.
    7. ↑ Warner, Brian D. (January 2011). "Upon Further Review: V. An Examination of Previous Lightcurve Analysis from the Palmer Divide Observatory". The Minor Planet Bulletin 38 (1): 63–65. Bibcode:2011MPBu...38...63W. ISSN 1052-8091. Retrieved November 2015.
    8. ↑ Warner, B. (March 2001). "Asteroid Photometry at the Palmer Divide Observatory: Results for 706 Hirundo, 957 Camelia, and 1719 Jens". The Minor Planet Bulletin 28. Bibcode:2001MPBu...28....4W. Retrieved November 2015.
    9. ↑ Behrend, Raoul. "Asteroids and comets rotation curves – (1719) Jens". Geneva Observatory. Retrieved November 2015.
    10. ↑ Hanus, J.; Durech, J.; Broz, M.; Warner, B. D.; Pilcher, F.; Stephens, R.; et al. (June 2011). "A study of asteroid pole-latitude distribution based on an extended set of shape models derived by the lightcurve inversion method". Astronomy & Astrophysics 530: 16. arXiv:1104.4114. Bibcode:2011A&A...530A.134H. doi:10.1051/0004-6361/201116738. Retrieved November 2015.
    11. ↑ "1719 Jens (1950 DP)". Minor Planet Center. Retrieved November 2015.
    12. ↑ "Asteroid Caught Marching Across Tadpole Nebula". JPL Photojournal. 13 May 2010. Retrieved November 2015.

    External links


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