1847 Stobbe

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1847 Stobbe
Discovery [1]
Discovered byH. Thiele
Discovery siteBergedorf Obs.
Discovery date1 February 1916
MPC designation(1847) Stobbe
Named after
Joachim Stobbe
(German astronomer)[2]
A916 CA · 1930 ML
1930 QT · 1937 AH
1951 MG · 1951 NF
1952 UC · 1959 LA
1968 OM1 · A902 YB
A906 YN
main-belt · (middle)[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc114.35 yr (41,766 days)
Aphelion2.6658 AU
Perihelion2.5547 AU
2.6103 AU
4.22 yr (1,540 days)
0° 14m 1.32s / day
Physical characteristics
Dimensions17.427±0.335 km[4][5]
22.72±2.09 km[6]
23.33±0.64 km[7]
23.85 km (derived)[3]
23.90±1.7 km (IRAS:3)[8]
5.617±0.002 h[9]
6.37±0.02 h[10]
0.1128 (derived)[3]
0.1231±0.019 (IRAS:3)[8]
SMASS = Xc  · [1]X[3]
11.0[4][7][8] · 11.1[1][3] · 11.15±0.11[11] · 11.20[6]

1847 Stobbe, provisional designation A916 CA, is an asteroid from the middle region of the asteroid belt, approximately 23 kilometers in diameter.

It was discovered on 1 February 1916, by Danish astronomer Holger Thiele at Bergedorf Observatory in Hamburg, Germany.[12] The asteroid was later named for German astronomer Joachim Stobbe.[2]

Orbit and classification[edit]

Stobbe orbits the Sun in the central main-belt at a distance of 2.6–2.7 AU once every 4 years and 3 months (1,540 days). Its orbit has an eccentricity of 0.02 and an inclination of 11° with respect to the ecliptic.[1] The body's observation arc begins with its official discovery observation at Bergedorf. Its first (unused) identification as A902 YB was made at Heidelberg Observatory in 1902.[12]

Physical characteristics[edit]

On the SMASS taxonomic scheme, the X-type asteroid is characterized as a Xc-subtype, a group of bodies with intermediary spectra between those typically seen for metallic and carbonaceous bodies.[1]

Rotation period[edit]

In March 2009, a rotational lightcurve of Stobbe was obtained from photometric observations made by French amateur astronomer Pierre Antonini at his Observatoire de Bédoin rendered a well-defined period of 5.617±0.002 hours with a brightness variation of 0.35 in magnitude (U=3),[9] superseding a previous observation at the Roach Motel Observatory (856) in Riverside, California, that gave a period of 6.37±0.02 hours and an amplitude of 0.27 in magnitude (U=2).[10]

Diameter and albedo[edit]

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the asteroid has an albedo of 0.11–0.14 with a corresponding diameter between 22.7 and 23.9 kilometers.[6][7][8]

The Collaborative Asteroid Lightcurve Link agrees with these results and derives an albedo of 0.113 and a diameter of 23.85 kilometers, while a study using preliminary results from NEOWISE diverges significantly from all other observations, giving a diameter of 17.4 kilometers and an albedo of 0.232.[4][5]


This minor planet was named in honor of German astronomer and observer of comets and minor planets, Joachim Stobbe (1900–1943). During 1925–1927 he worked at the discovering Hamburg–Bergedorf Observatory and later at the Berlin Observatory, where he observed the rotational lightcurve of the large near-Earth object 433 Eros in detail. During the last few years of his life, he was director of the Poznan Observatory in Poland.[2] The official naming citation was published by the Minor Planet Center before November 1977 (M.P.C. 4236).[13]


  1. ^ a b c d e f "JPL Small-Body Database Browser: 1847 Stobbe (A916 CA)" (2017-04-30 last obs.). Jet Propulsion Laboratory. Retrieved 8 June 2017.
  2. ^ a b c Schmadel, Lutz D. (2007). "(1847) Stobbe". Dictionary of Minor Planet Names – (1847) Stobbe. Springer Berlin Heidelberg. p. 148. doi:10.1007/978-3-540-29925-7_1848. ISBN 978-3-540-00238-3.
  3. ^ a b c d e "LCDB Data for (1847) Stobbe". Asteroid Lightcurve Database (LCDB). Retrieved 17 May 2016.
  4. ^ a b c d 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 17 May 2016.
  5. ^ a b c Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. arXiv:1109.4096. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. Retrieved 8 December 2016.
  6. ^ a b c d Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (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 17 May 2016.
  7. ^ a b c d 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 8 December 2016.
  8. ^ a b c d Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 17 May 2016.
  9. ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (1847) Stobbe". Geneva Observatory. Retrieved 17 May 2016.
  10. ^ a b Malcolm, G. (June 2002). "Rotational Periods and Lightcurves of 445 Edna, 1817 Katanga and 1847 Stobbe". The Minor Planet Bulletin. 29: 28–29. Bibcode:2002MPBu...29...28M. Retrieved 17 May 2016.
  11. ^ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 17 May 2016.
  12. ^ a b "1847 Stobbe (A916 CA)". Minor Planet Center. Retrieved 1 March 2016.
  13. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 17 May 2016.

External links[edit]