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{{Infobox planet
'''2429 Schürer''' is a [[main belt]] [[asteroid]] with an [[orbital period]] of 1505.8494723 days (4.12 years).<ref name="JP: Small-body Database Browser">{{cite web | url = http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2429 | title = JPL Small-Body Database Browser | accessdate = 2008-05-17 | publisher = [[NASA]]}}</ref> It is a member of the [[Maria family]] of asteroids and has a rotation period of {{nowrap|7.070 ± 0.001 hours}}.<ref name=icarus172_2_388/>
| minorplanet = yes
| name = 2429 Schürer
The asteroid was discovered on October 12, 1977.
| background = #FFFFC0
| image =
| caption =
| discovery_ref = &thinsp;<ref name="jpldata" />
| discovered = 12 October 1977
| discoverer = [[Paul Wild (Swiss astronomer)|P. Wild]]
| discovery_site = [[Zimmerwald Observatory|Zimmerwald Obs.]]
| mp_name = 2429 Schurer
| alt_names = 1977 TZ{{·}}A915 TB
| named_after = [[Max Schürer]]<br />{{small|(astronomer)}}<ref name="springer" />
| mp_category = [[main-belt]]<br />[[Eunomia family|Eunomia]]&thinsp;<ref name="lcdb" />{{·}}[[Maria family|Maria]]&thinsp;<ref name="Alvarez-2004" />
| orbit_ref = &thinsp;<ref name="jpldata" />
| epoch = 27 June 2015 ([[Julian day|JD]] 2457200.5)
| uncertainty = 0
| observation_arc = {{nowrap|100.09 yr (36,559 days)}}
| aphelion = 2.8292 [[Astronomical unit|AU]]
| perihelion = 2.3140 AU
| semimajor = 2.5716 AU
| eccentricity = 0.1001
| period = 4.12 [[Julian year (astronomy)|yr]] (1,506 days)
| mean_anomaly = 31.551[[degree (angle)|°]]
| inclination = 15.050°
| asc_node = 17.918°
| arg_peri = 29.525°
| dimensions = {{val|15.95|0.38}} km<ref name="AKARI" /><br />{{val|12.517|0.026}} km<ref name="WISE" /><br />{{val|15.99|0.26}} km<ref name="Masiero-2012" /><br />12.09 km {{small|(caculated)}}<ref name="lcdb" />
| rotation = 6.66 [[hour|h]]<ref name="Kim-2014" /><br />{{val|7.070|}} h<ref name="Alvarez-2004" /><br />{{val|7.45|0.01}} h{{efn|name=lcdb}}
| albedo = {{val|0.096|0.005}}<ref name="AKARI" /><br />{{val|0.1976|0.0440}}<ref name="WISE" /><br />{{val|0.120|0.023}}<ref name="Masiero-2012" /><br />0.21 {{small|(assumed)}}<ref name="lcdb" />
| spectral_type = [[S-type asteroid|S]]&thinsp;<ref name="lcdb" />
| abs_magnitude = 11.9<ref name="jpldata" />
}}


'''2429 Schürer''', provisional designation 1977 TZ, is a stony [[asteroid]] from the inner regions of the [[asteroid belt]], about 14 kilometers in diameter. It was discovered by Swiss astronomer [[Paul Wild (Swiss astronomer)|Paul Wild]] at [[Zimmerwald Observatory]] near Bern, Switzerland, on 12 October 1977.<ref name="MPC-Schurer" />
==References==
{{reflist|refs=


The Collaborative Asteroid Lightcurve Link (CALL) classifies the asteroid as a member of the [[Eunomia family]], a large group of [[S-type asteroid|S-type]] asteroids and the most prominent family in the intermediate main-belt. However, based on its concurring orbital elements, Alvarez-Candal from the Universidad Nacional de Córdoba, groups the asteroid into the [[Maria family]], which is named after [[170 Maria]].<ref name="Alvarez-2004" />{{rp|389}}
<ref name=icarus172_2_388>{{citation | display-authors=1 | last1=Alvarez-Candal | first1=Alvaro | last2=Duffard | first2=René | last3=Angeli | first3=Cláudia A. | last4=Lazzaro | first4=Daniela | last5=Fernández | first5=Silvia | title=Rotational lightcurves of asteroids belonging to families | journal=Icarus | volume=172 | issue=2 | pages=388–401 | doi=10.1016/j.icarus.2004.06.008 | bibcode=2004Icar..172..388A | postscript=. |date=December 2004}}</ref>


It orbits the Sun at a distance of 2.3–2.8&nbsp;[[Astronomical unit|AU]] once every 4 years and 1 month (1,506 days). Its orbit shows an [[orbital eccentricity|eccentricity]] of 0.10 and is [[orbital inclination|tilted]] by 15 degrees to the plane of the [[ecliptic]]. The body's [[rotation period]] has been determined by three different photometric [[light-curve]] observations, that gave a period between 6.7 and 7.5 hours.<ref name="Kim-2014" /><ref name="Alvarez-2004" />{{efn|name=lcdb}} The asteroid's [[astronomical albedo|albedo]] amounts to 0.10–0.20, according to the surveys carried out by the Japanese [[Akari (satellite)|Akari]] satellite (0.10) and the [[Wide-field Infrared Survey Explorer]] with its subsequent [[NEOWISE]] mission (0.12 and 0.20), while CALL assumes an albedo of 0.21, which results in the lowest of all estimated diameters for the body(12.1&nbsp;km).<ref name="lcdb" /><ref name="AKARI" /><ref name="WISE" /><ref name="Masiero-2012" />
}}

The minor planet was named in honor of Swiss astronomer Max Schürer (1910–1997), who was director of the Astronomical Institute of the [[University of Bern]] from 1947 to 1980. Due to his initiative, endurance, and great technical competence, the discovering observatory at Zimmerwald – after which the asteroid [[1775 Zimmerwald]] is named – could be build in 1956. He did a lot of orbit computation on asteroids when he was a pupil of astronomer Sigmund Mauderli (1876–1962), who was the preceding director of the Astronomical Institute ''(also see [[1748 Mauderli]])''. Schürer also dealt with stellar dynamics and was deeply involved as a pioneer in [[satellite geodesy]].<ref name="springer" />

== References ==
{{notelist|refs=

{{efn|name=lcdb|1=Seifert (2011) web: rotation period {{val|7.45|0.01}} hours with a brightness amplitude of {{val|0.12}} mag. Summary figures at {{URL|1=http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=2429%7CSchurer |2=Collaborative Asteroid Lightcurve Link (CALL) for (2429) Schurer}}}}

}} <!-- end of notelist -->

{{reflist
|refs=

<ref name="lcdb">{{cite web
|title=LCDB Data for (2429) Schurer
|publisher=Asteroid Lightcurve Database (LCDB)
|url=http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=2429%7CSchurer
|accessdate=December 2015}}</ref>

<ref name="jpldata">{{cite web
|type=2015-11-13 last obs.
|title=JPL Small-Body Database Browser: 2429 Schurer (1977 TZ)
|url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2002429
|publisher=Jet Propulsion Laboratory
|accessdate=December 2015}}</ref>

<ref name="springer">{{cite book
|url=http://link.springer.com/referenceworkentry/10.1007/978-3-540-29925-7_2430
|title=Dictionary of Minor Planet Names – (2429) Schürer
|last=Schmadel |first=Lutz D.
|publisher=Springer Berlin Heidelberg
|page=198
|date=2003
|isbn=978-3-540-29925-7
|accessdate=December 2015}}</ref>

<ref name="MPC-Schurer">{{cite web
|title=2429 Schurer (1977 TZ)
|work=Minor Planet Center
|url=http://www.minorplanetcenter.net/db_search/show_object?object_id=2429
|accessdate=December 2015}}</ref>

<ref name="AKARI">{{cite journal
|authors = Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; Ishihara, Daisuke; Kataza, Hirokazu; Takita, Satoshi; Oyabu, Shinki; Ueno, Munetaka; Matsuhara, Hideo; Onaka, Takashi
|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= December 2015}}</ref>

<ref name="WISE">{{cite journal
|authors = Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; McMillan, R. S.; Spahr, T.; Cutri, R. M.; Wright, E.; Watkins, J.; Mo, W.; Maleszewski, C.
|date = November 2011
|title = NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...90M
|journal = The Astrophysical Journal
|volume = 741
|issue = 2
|page = 25
|bibcode = 2011ApJ...741...90M
|doi = 10.1088/0004-637X/741/2/90
|access-date= December 2015}}</ref>

<ref name="Masiero-2012">{{cite journal
|authors = Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; Cabrera, M. S.
|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
|access-date= December 2015}}</ref>

<ref name="Alvarez-2004">{{cite journal
|authors = Alvarez-Candal, Alvaro; Duffard, René; Angeli, Cláudia A.; Lazzaro, Daniela; Fernández, Silvia
|date = December 2004
|title = Rotational lightcurves of asteroids belonging to families
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2004Icar..172..388A
|journal = Icarus
|volume = 172
|issue = 2
|pages = 388–401
|bibcode = 2004Icar..172..388A
|doi = 10.1016/j.icarus.2004.06.008
|access-date= December 2015}}</ref>

<ref name="Kim-2014">{{cite journal
|authors = Kim, M.-J.; Choi, Y.-J.; Moon, H.-K.; Byun, Y.-I.; Brosch, N.; Kaplan, M.; Kaynar, S.; Uysal, &#214;.; Güzel, E.; Behrend, R.; Yoon, J.-N.; Mottola, S.; Hellmich, S.; Hinse, T. C.; Eker, Z.; Park, J.-H.
|date = March 2014
|title = Rotational Properties of the Maria Asteroid Family
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014AJ....147...56K
|journal = The Astronomical Journal
|volume = 147
|issue = 3
|page = 15
|bibcode = 2014AJ....147...56K
|doi = 10.1088/0004-6256/147/3/56
|access-date= December 2015}}</ref>

}} <!-- end of reflist -->

== External links ==
* [http://www.minorplanet.info/PHP/lcdbsummaryquery.php Asteroid Lightcurve Database (LCDB)], query form ([http://www.minorplanet.info/lightcurvedatabase.html info])
* [https://books.google.se/books?id=aeAg1X7afOoC&pg Dictionary of Minor Planet Names], Google books
* [http://obswww.unige.ch/~behrend/page_cou.html Asteroids and comets rotation curves, CdR] – Observatoire de Genève, Raoul Behrend
* [http://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html Discovery Circumstances: Numbered Minor Planets (1)-(5000)] – Minor Planet Center
* {{JPL small body|title=2429 Schurer (1977 TZ)|id=2002429}}


{{Minor planets navigator|2428 Kamenyar|2430 Bruce Helin}}
{{Minor planets navigator|2428 Kamenyar|2430 Bruce Helin}}
Line 14: Line 158:


{{DEFAULTSORT:Schurer}}
{{DEFAULTSORT:Schurer}}
[[Category:Main-belt asteroids]]
[[Category:Main-belt asteroids|002429]]
[[Category:Numbered asteroids]]
[[Category:Asteroids named for people]]
[[Category:Asteroids named for people]]
[[Category:Astronomical objects discovered in 1977]]
[[Category:Astronomical objects discovered in 1977|19771012]]
[[Category:Eunomia asteroids|002429]]



{{Beltasteroid-stub}}
{{Beltasteroid-stub}}

Revision as of 17:25, 10 December 2015

2429 Schürer
Discovery [1]
Discovered byP. Wild
Discovery siteZimmerwald Obs.
Discovery date12 October 1977
Designations
2429 Schurer
Named after
Max Schürer
(astronomer)[2]
1977 TZ · A915 TB
main-belt
Eunomia [3] · Maria [4]
Orbital characteristics [1]
Epoch 27 June 2015 (JD 2457200.5)
Uncertainty parameter 0
Observation arc100.09 yr (36,559 days)
Aphelion2.8292 AU
Perihelion2.3140 AU
2.5716 AU
Eccentricity0.1001
4.12 yr (1,506 days)
31.551°
Inclination15.050°
17.918°
29.525°
Physical characteristics
Dimensions15.95±0.38 km[5]
12.517±0.026 km[6]
15.99±0.26 km[7]
12.09 km (caculated)[3]
6.66 h[8]
7.070 h[4]
7.45±0.01 h[a]
0.096±0.005[5]
0.1976±0.0440[6]
0.120±0.023[7]
0.21 (assumed)[3]
S [3]
11.9[1]

2429 Schürer, provisional designation 1977 TZ, is a stony asteroid from the inner regions of the asteroid belt, about 14 kilometers in diameter. It was discovered by Swiss astronomer Paul Wild at Zimmerwald Observatory near Bern, Switzerland, on 12 October 1977.[9]

The Collaborative Asteroid Lightcurve Link (CALL) classifies the asteroid as a member of the Eunomia family, a large group of S-type asteroids and the most prominent family in the intermediate main-belt. However, based on its concurring orbital elements, Alvarez-Candal from the Universidad Nacional de Córdoba, groups the asteroid into the Maria family, which is named after 170 Maria.[4]: 389 

It orbits the Sun at a distance of 2.3–2.8 AU once every 4 years and 1 month (1,506 days). Its orbit shows an eccentricity of 0.10 and is tilted by 15 degrees to the plane of the ecliptic. The body's rotation period has been determined by three different photometric light-curve observations, that gave a period between 6.7 and 7.5 hours.[8][4][a] The asteroid's albedo amounts to 0.10–0.20, according to the surveys carried out by the Japanese Akari satellite (0.10) and the Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission (0.12 and 0.20), while CALL assumes an albedo of 0.21, which results in the lowest of all estimated diameters for the body(12.1 km).[3][5][6][7]

The minor planet was named in honor of Swiss astronomer Max Schürer (1910–1997), who was director of the Astronomical Institute of the University of Bern from 1947 to 1980. Due to his initiative, endurance, and great technical competence, the discovering observatory at Zimmerwald – after which the asteroid 1775 Zimmerwald is named – could be build in 1956. He did a lot of orbit computation on asteroids when he was a pupil of astronomer Sigmund Mauderli (1876–1962), who was the preceding director of the Astronomical Institute (also see 1748 Mauderli). Schürer also dealt with stellar dynamics and was deeply involved as a pioneer in satellite geodesy.[2]

References

  1. ^ a b Seifert (2011) web: rotation period 7.45±0.01 hours with a brightness amplitude of 0.12 mag. Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (2429) Schurer
  1. ^ a b c "JPL Small-Body Database Browser: 2429 Schurer (1977 TZ)" (2015-11-13 last obs.). Jet Propulsion Laboratory. Retrieved December 2015. {{cite web}}: Check date values in: |accessdate= (help)
  2. ^ a b Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (2429) Schürer. Springer Berlin Heidelberg. p. 198. ISBN 978-3-540-29925-7. Retrieved December 2015. {{cite book}}: Check date values in: |accessdate= (help)
  3. ^ a b c d e "LCDB Data for (2429) Schurer". Asteroid Lightcurve Database (LCDB). Retrieved December 2015. {{cite web}}: Check date values in: |accessdate= (help)
  4. ^ a b c d "Rotational lightcurves of asteroids belonging to families". Icarus. 172 (2): 388–401. December 2004. Bibcode:2004Icar..172..388A. doi:10.1016/j.icarus.2004.06.008. Retrieved December 2015. {{cite journal}}: Check date values in: |access-date= (help); Unknown parameter |authors= ignored (help)
  5. ^ a b c "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. October 2011. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved December 2015. {{cite journal}}: Check date values in: |access-date= (help); Unknown parameter |authors= ignored (help)
  6. ^ a b c "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. November 2011. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved December 2015. {{cite journal}}: Check date values in: |access-date= (help); Unknown parameter |authors= ignored (help)
  7. ^ a b c "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. November 2012. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved December 2015. {{cite journal}}: Check date values in: |access-date= (help); Unknown parameter |authors= ignored (help)
  8. ^ a b "Rotational Properties of the Maria Asteroid Family". The Astronomical Journal. 147 (3): 15. March 2014. Bibcode:2014AJ....147...56K. doi:10.1088/0004-6256/147/3/56. Retrieved December 2015. {{cite journal}}: Check date values in: |access-date= (help); Unknown parameter |authors= ignored (help)
  9. ^ "2429 Schurer (1977 TZ)". Minor Planet Center. Retrieved December 2015. {{cite web}}: Check date values in: |accessdate= (help)


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