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词条 1726 Hoffmeister
释义

  1. Orbit and classification

  2. Physical characteristics

      Diameter and albedo    Rotational lightcurve  

  3. Naming

  4. References

  5. External links

{{Infobox planet
| minorplanet = yes
| name = 1726 Hoffmeister
| background = #D6D6D6
| image =
| image_size =
| caption =
| discovery_ref =  
| discovered = 24 July 1933
| discoverer = K. Reinmuth
| discovery_site = Heidelberg Obs.
| mpc_name = (1726) Hoffmeister
| alt_names = 1933 OE{{·}}1955 FC
1955 HX{{·}}1957 WD
A924 UA
| named_after = Cuno Hoffmeister
{{small|(German astronomer)}} [2]
| mp_category = main-belt{{·}}{{small|(middle)}}
Hoffmeister [3][4]
| orbit_ref =  
| epoch = 4 September 2017 (JD 2458000.5)
| uncertainty = 0
| observation_arc = 91.85 yr (33,547 days)
| aphelion = 2.9051 AU
| perihelion = 2.6702 AU
| semimajor = 2.7877 AU
| eccentricity = 0.0421
| period = 4.65 yr (1,700 days)
| mean_anomaly = 42.063°
| mean_motion = {{Deg2DMS|0.2118|sup=ms}} / day
| inclination = 3.4833°
| asc_node = 230.97°
| arg_peri = 69.026°
| dimensions = 17.35 km {{small|(calculated)}}[6]
{{val|22.03|5.39}}[7]
{{val|22.52|0.23}} km[8]
{{val|24.61|0.52}}[9]
{{val|25.250|0.079}} km[10]
{{val|25.438|0.118}} km[11]
{{val|25.67|8.37}}[12]
| rotation = {{val|11.7058|0.0056}} h[13]
| albedo = {{val|0.03|0.03}}[12]
{{val|0.0360|0.0066}}[11]
{{val|0.037|0.005}}[10]
{{val|0.042|0.006}}[8]
{{val|0.044|0.002}}[9]
{{val|0.05|0.05}}[7]
0.057 {{small|(assumed)}}[6]
| spectral_type = SMASS = Cb {{·}}C [6][23]
| abs_magnitude = {{val|12.082|0.002}} {{small|(R)}}[13]{{·}}12.10[9]{{·}}12.26[12]{{·}}12.2[11]{{·}}12.3[7][8]{{·}}12.53[6]{{·}}{{val|12.54|0.24}}[23]
}}

1726 Hoffmeister, provisional designation {{mp|1933 OE}}, is a carbonaceous asteroid and namesake of the Hoffmeister family from the central region of the asteroid belt, approximately 23 kilometers in diameter.

It was discovered on 24 July 1933, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany, and named after astronomer Cuno Hoffmeister.[33]

Orbit and classification

Hoffmeister is the namesake and lowest-numbered member of the very compact Hoffmeister family ({{small|519}}), which, based upon its low albedo, was most likely formed from the breakup of a 50–100 kilometer-sized, carbon-rich parent body within the past several hundred million years.[3][4]

It orbits the Sun in the central main-belt at a distance of 2.7–2.9 AU once every 4 years and 8 months (1,700 days; semi-major axis of 2.79 AU). Its orbit has an eccentricity of 0.04 and an inclination of 3° with respect to the ecliptic. It was first identified as {{mp|1924 UA}} at the Yerkes Observatory in 1924, extending the asteroid's observation arc by 9 years prior to its official discovery observation at Heidelberg.[33]

Physical characteristics

In the SMASS classification, Hoffmeister is characterized as a Cb-type, a subtype of the carbonaceous C-complex.[23]

Diameter and albedo

According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Hoffmeister measures between 22.03 and 25.67 kilometers in diameter, and its surface has a low albedo between 0.03 and 0.05.[7][8][9][10][11][12] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 17.4 kilometers with an absolute magnitude of 12.53.[6]

Rotational lightcurve

In December 2009, a rotational lightcurve of Hoffmeister was obtained from photometric observations by astronomers at the Palomar Transient Factory in California. It gave a rotation period of {{val|11.7058|0.0056}} hours with a brightness variation of 0.40 magnitude ({{small|U=2}}).[13]

Naming

This minor planet was named in memory of German astronomer Cuno Hoffmeister (1892–1968), who founded the Sonneberg Observatory in 1925, and became one of its directors (see 1039 Sonneberga). Hoffmeister discovered thousands of variable stars, co-discovered comet C/1959 O1, thoroughly investigated a large number of meteors, and discovered 5 minor planets: 2183 Neufang, 3203 Huth, 3674 Erbisbühl, 4183 Cuno (which was later named after him) and 4724 Brocken. The lunar crater Hoffmeister was also named in his honor.[2] The official naming citation was published before November 1977 ({{small|M.P.C. 3933}}).[49]

References

1. ^1 2 {{cite book |title = Dictionary of Minor Planet Names – (1726) Hoffmeister |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 137 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_1727 |chapter = (1726) Hoffmeister }}
2. ^1 2 {{cite web |title = 1726 Hoffmeister (1933 OE) |work = Minor Planet Center |url = http://www.minorplanetcenter.net/db_search/show_object?object_id=1726 |accessdate = 28 October 2016}}
3. ^1 {{cite web |title = MPC/MPO/MPS Archive |work = Minor Planet Center |url = http://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html |accessdate = 28 October 2016}}
4. ^1 2 {{Cite journal |first1 = V. |last1 = Carruba |first2 = B. |last2 = Novakovic |first3 = S. |last3 = Aljbaae |date = March 2017 |title = The Hoffmeister asteroid family |journal = Monthly Notices of the Royal Astronomical Society |volume = 465 |issue = 4 |pages = 4099–4105 |bibcode = 2017MNRAS.465.4099C |doi = 10.1093/mnras/stw3022 |arxiv = 1611.06176 }}
5. ^1 2 {{cite journal |author = Migliorini, F. |author2 = Manara, A. |author3 = di Martino, M. |author4 = Farinella, P. |date = June 1996 |title = The Hoffmeister asteroid family: inferences from physical data. |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1996A&A...310..681M |journal = Astronomy and Astrophysics |volume = 310 |pages = 681–685 |bibcode = 1996A&A...310..681M |access-date= 17 November 2015}}
6. ^1 2 3 {{Cite journal |display-authors = 6 |first1 = Joseph R. |last1 = Masiero |first2 = T. |last2 = Grav |first3 = A. K. |last3 = Mainzer |first4 = C. R. |last4 = Nugent |first5 = J. M. |last5 = Bauer |first6 = R. |last6 = Stevenson |first7 = S. |last7 = Sonnett |date = August 2014 |title = Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014ApJ...791..121M |journal = The Astrophysical Journal |volume = 791 |issue = 2 |page = 11 |bibcode = 2014ApJ...791..121M |doi = 10.1088/0004-637X/791/2/121 |arxiv = 1406.6645 |accessdate = 28 October 2016}}
7. ^1 2 3 4 5 {{cite web |title = LCDB Data for (1726) Hoffmeister |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=1726%7CHoffmeister |accessdate = 28 October 2016}}
8. ^1 2 3 4 {{cite journal |display-authors = 6 |first1 = A. |last1 = Mainzer |first2 = T. |last2 = Grav |first3 = J. |last3 = Masiero |first4 = E. |last4 = Hand |first5 = J. |last5 = Bauer |first6 = D. |last6 = Tholen |first7 = R. S. |last7 = McMillan |first8 = T. |last8 = Spahr |first9 = R. M. |last9 = Cutri |first10 = E. |last10 = Wright |first11 = J. |last11 = Watkins |first12 = W. |last12 = Mo |first13 = C. |last13 = Maleszewski |date = November 2011 |title = NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results |journal = The Astrophysical Journal |volume = 741 |issue = 2 |page = 25 |bibcode = 2011ApJ...741...90M |doi = 10.1088/0004-637X/741/2/90 |arxiv = 1109.6407 }}
9. ^1 2 3 4 {{cite journal |display-authors = 6 |first1 = Fumihiko |last1 = Usui |first2 = Daisuke |last2 = Kuroda |first3 = Thomas G. |last3 = Müller |first4 = Sunao |last4 = Hasegawa |first5 = Masateru |last5 = Ishiguro |first6 = Takafumi |last6 = Ootsubo |first7 = Daisuke |last7 = Ishihara |first8 = Hirokazu |last8 = Kataza |first9 = Satoshi |last9 = Takita |first10 = Shinki |last10 = Oyabu |first11 = Munetaka |last11 = Ueno |first12 = Hideo |last12 = Matsuhara |first13 = Takashi |last13 = Onaka |date = October 2011 |title = Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011PASJ...63.1117U |journal = Publications of the Astronomical Society of Japan |volume = 63 |issue = 5 |pages = 1117–1138 |bibcode = 2011PASJ...63.1117U |doi = 10.1093/pasj/63.5.1117 |access-date= 19 April 2017}}
10. ^1 2 3 4 {{cite journal |display-authors = 6 |first1 = Joseph R. |last1 = Masiero |first2 = A. K. |last2 = Mainzer |first3 = T. |last3 = Grav |first4 = J. M. |last4 = Bauer |first5 = R. M. |last5 = Cutri |first6 = C. |last6 = Nugent |first7 = M. S. |last7 = Cabrera |date = November 2012 |title = Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...759L...8M |journal = The Astrophysical Journal Letters |volume = 759 |issue = 1 |page = 5 |bibcode = 2012ApJ...759L...8M |doi = 10.1088/2041-8205/759/1/L8 |arxiv = 1209.5794 |access-date= 28 October 2016}}
11. ^1 2 3 {{cite journal |display-authors = 6 |first1 = Adam |last1 = Waszczak |first2 = Chan-Kao |last2 = Chang |first3 = Eran O. |last3 = Ofek |first4 = Russ |last4 = Laher |first5 = Frank |last5 = Masci |first6 = David |last6 = Levitan |first7 = Jason |last7 = Surace |first8 = Yu-Chi |last8 = Cheng |first9 = Wing-Huen |last9 = Ip |first10 = Daisuke |last10 = Kinoshita |first11 = George |last11 = Helou |first12 = Thomas A. |last12 = Prince |first13 = Shrinivas |last13 = Kulkarni |date = September 2015 |title = Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015AJ....150...75W |journal = The Astronomical Journal |volume = 150 |issue = 3 |page = 35 |bibcode = 2015AJ....150...75W |doi = 10.1088/0004-6256/150/3/75 |arxiv = 1504.04041 |access-date= 28 October 2016}}
12. ^1 2 3 4 {{cite journal |display-authors = 6 |first1 = C. R. |last1 = Nugent |first2 = A. |last2 = Mainzer |first3 = J. |last3 = Masiero |first4 = J. |last4 = Bauer |first5 = R. M. |last5 = Cutri |first6 = T. |last6 = Grav |first7 = E. |last7 = Kramer |first8 = S. |last8 = Sonnett |first9 = R. |last9 = Stevenson |first10 = E. L. |last10 = Wright |date = December 2015 |title = NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015ApJ...814..117N |journal = The Astrophysical Journal |volume = 814 |issue = 2 |page = 13 |bibcode = 2015ApJ...814..117N |doi = 10.1088/0004-637X/814/2/117 |arxiv = 1509.02522 |access-date= 19 April 2017}}
13. ^1 2 3 4 {{cite journal |display-authors = 6 |first1 = C. R. |last1 = Nugent |first2 = A. |last2 = Mainzer |first3 = J. |last3 = Bauer |first4 = R. M. |last4 = Cutri |first5 = E. A. |last5 = Kramer |first6 = T. |last6 = Grav |first7 = J. |last7 = Masiero |first8 = S. |last8 = Sonnett |first9 = E. L. |last9 = Wright |date = September 2016 |title = NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016AJ....152...63N |journal = The Astronomical Journal |volume = 152 |issue = 3 |page = 12 |bibcode = 2016AJ....152...63N |doi = 10.3847/0004-6256/152/3/63 |arxiv = 1606.08923 |access-date= 19 April 2017}}
14. ^1 2 3 {{cite journal |display-authors = 6 |first1 = Peter |last1 = Veres |first2 = Robert |last2 = Jedicke |first3 = Alan |last3 = Fitzsimmons |first4 = Larry |last4 = Denneau |first5 = Mikael |last5 = Granvik |first6 = Bryce |last6 = Bolin |first7 = Serge |last7 = Chastel |first8 = Richard J. |last8 = Wainscoat |first9 = William S. |last9 = Burgett |first10 = Kenneth C. |last10 = Chambers |first11 = Heather |last11 = Flewelling |first12 = Nick |last12 = Kaiser |first13 = Eugen A. |last13 = Magnier |first14 = Jeff S. |last14 = Morgan |first15 = Paul A. |last15 = Price |first16 = John L. |last16 = Tonry |first17 = Christopher |last17 = Waters |date = November 2015 |title = Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015Icar..261...34V |journal = Icarus |volume = 261 |pages = 34–47 |bibcode = 2015Icar..261...34V |doi = 10.1016/j.icarus.2015.08.007 |arxiv = 1506.00762 |access-date= 28 October 2016}}
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}}

External links

  • List of 1819 members of the Hoffmeister family, [https://arxiv.org/abs/1502.01628 D. Nesvorny, M. Broz, V. Carruba] (2015), data
  • Asteroid Lightcurve Database (LCDB), query form (info)
  • [https://books.google.com/books?id=aeAg1X7afOoC&pg Dictionary of Minor Planet Names], Google books
  • Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
  • Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
  • {{JPL small body}}
{{Minor planets navigator |1725 CrAO |number=1726 |1727 Mette}}{{Small Solar System bodies}}{{DEFAULTSORT:Hoffmeister}}

6 : Hoffmeister asteroids|Discoveries by Karl Wilhelm Reinmuth|Minor planets named for people|Named minor planets|Cb-type asteroids (SMASS)|Astronomical objects discovered in 1933
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