207 Hedda: Difference between revisions
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<!-- Additional parameters for this template are available at [[Template:Infobox Planet]]. -->{{Infobox planet | discovery=yes | physical_characteristics = yes | bgcolour=#FFFFC0 |
<!-- Additional parameters for this template are available at [[Template:Infobox Planet]]. -->{{Infobox planet | discovery=yes | physical_characteristics = yes | bgcolour=#FFFFC0 |
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| name=207 Hedda |
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| discoverer=[[Johann Palisa]] |
| discoverer=[[Johann Palisa]] |
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| discovered=October 17, 1879 |
| discovered=October 17, 1879 |
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| mp_category=[[Asteroid belt|Main belt]] |
| mp_category=[[Asteroid belt|Main belt]] |
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| epoch=30 January 2005 ([[Julian day|JD]] 2453400.5) |
| epoch=30 January 2005 ([[Julian day|JD]] 2453400.5) |
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| semimajor= |
| semimajor=2.284 [[Astronomical unit|AU]] |
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| perihelion= |
| perihelion=2.218 AU |
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| aphelion= |
| aphelion=2.35 AU |
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| eccentricity=0.029 |
| eccentricity=0.029 |
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| period=1260.619 d |
| period=1260.619 d<br>(3.45 [[Julian year (astronomy)|yr]]) |
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| inclination=3.804° |
| inclination=3.804° |
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| asc_node=29.292° |
| asc_node=29.292° |
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| avg_speed=19.71 km/s |
| avg_speed=19.71 km/s |
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| dimensions=59.0 km |
| dimensions=59.0 km |
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| mass= |
| mass= |
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| density= |
| density= |
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| surface_grav= |
| surface_grav= |
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| escape_velocity= |
| escape_velocity= |
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| rotation= |
| rotation=19.489<ref name="mpb37_1_21"/> h |
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| spectral_type=[[C-type asteroid|C]] |
| spectral_type=[[C-type asteroid|C]] |
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| abs_magnitude=9.92 |
| abs_magnitude=9.92 |
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| albedo=0.055 |
| albedo=0.055 |
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| single_temperature= |
| single_temperature= |
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}} |
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'''207 Hedda''' is a sizeable [[Asteroid belt|Main belt]] [[asteroid]]. It is a [[C-type asteroid]], meaning it is primitive in composition and dark in colour. |
'''207 Hedda''' is a sizeable [[Asteroid belt|Main belt]] [[asteroid]]. It is a [[C-type asteroid]], meaning it is primitive in composition and dark in colour. This asteroid was discovered by [[Johann Palisa]] on October 17, 1879 in [[Pula|Pola]] and was named after Hedwig, wife of astronomer [[Friedrich A. T. Winnecke]]. |
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Attempts to determine the rotation period for this asteroid have led to conflicting results. A study published in 2010 using [[Photometry (astronomy)|photometric]] observations from Organ Mesa Observatory showed a [[rotation period]] of 19.489 ± 0.002 hours and a brightness variation of 0.18 ± 0.02 in [[Magnitude (astronomy)|magnitude]].<ref name="mpb37_1_21"/> |
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It was discovered by [[Johann Palisa]] on October 17, 1879 in [[Pula|Pola]] and was named after Hedwig, wife of astronomer [[Friedrich A. T. Winnecke]]. |
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== References == |
== References == |
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{{reflist|refs= |
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<ref name="mpb37_1_21">{{citation |
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| last1=Pilcher | first1=Frederick |
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| title=Rotational Period Determination for 23 Thalia, 204 Kallisto and 207 Hedda, and Notes on 161 Athor and 215 Oenone |
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| journal=The Minor Planet Bulletin |
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| volume=37 | issue=1 | pages=21–23 | date=January 2010 |
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| bibcode=2010MPBu...37...21P |
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| postscript=. |
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}}</ref> |
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}} |
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==External links== |
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*[ftp://ftp.lowell.edu/pub/elgb/astorb.html The Asteroid Orbital Elements Database] |
*[ftp://ftp.lowell.edu/pub/elgb/astorb.html The Asteroid Orbital Elements Database] |
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*[http://cfa-www.harvard.edu/iau/lists/NumberedMPs.html Minor Planet Discovery Circumstances] |
*[http://cfa-www.harvard.edu/iau/lists/NumberedMPs.html Minor Planet Discovery Circumstances] |
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Revision as of 19:44, 9 April 2015
| Discovery | |
|---|---|
| Discovered by | Johann Palisa |
| Discovery date | October 17, 1879 |
| Designations | |
| 1932 CL1, 1934 XJ, 1953 BF | |
| Main belt | |
| Orbital characteristics | |
| Epoch 30 January 2005 (JD 2453400.5) | |
| Aphelion | 2.35 AU |
| Perihelion | 2.218 AU |
| 2.284 AU | |
| Eccentricity | 0.029 |
| 1260.619 d (3.45 yr) | |
Average orbital speed | 19.71 km/s |
| 275.242° | |
| Inclination | 3.804° |
| 29.292° | |
| 193.504° | |
| Physical characteristics | |
| Dimensions | 59.0 km |
| 19.489[1] h | |
| Albedo | 0.055 |
Spectral type | C |
| 9.92 | |
207 Hedda is a sizeable Main belt asteroid. It is a C-type asteroid, meaning it is primitive in composition and dark in colour. This asteroid was discovered by Johann Palisa on October 17, 1879 in Pola and was named after Hedwig, wife of astronomer Friedrich A. T. Winnecke.
Attempts to determine the rotation period for this asteroid have led to conflicting results. A study published in 2010 using photometric observations from Organ Mesa Observatory showed a rotation period of 19.489 ± 0.002 hours and a brightness variation of 0.18 ± 0.02 in magnitude.[1]
References
- ^ a b Pilcher, Frederick (January 2010), "Rotational Period Determination for 23 Thalia, 204 Kallisto and 207 Hedda, and Notes on 161 Athor and 215 Oenone", The Minor Planet Bulletin, 37 (1): 21–23, Bibcode:2010MPBu...37...21P.
External links
- The Asteroid Orbital Elements Database
- Minor Planet Discovery Circumstances
- Asteroid Albedo Compilation
_mathilde.jpg){kind=small} | This article about a C-type asteroid native to the asteroid belt is a stub. You can help Wikipedia by expanding it. |