Astronomy:7835 Myroncope

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7835 Myroncope
007835-asteroid shape model (7835) Myroncope.png
Shape model of Myroncope from its lightcurve
Discovery [1]
Discovered byT. B. Spahr
Discovery siteCatalina Stn.
Discovery date16 June 1993
Designations
(7835) Myroncope
Named afterMyron Cope
(American sports announcer)[2][3]
1993 MC · 1990 WV12
Minor planet categorymain-belt [1][4] · (middle)
Mitidika [5]
Orbital characteristics [4]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc26.35 yr (9,623 days)
|{{{apsis}}}|helion}}3.1508 AU
|{{{apsis}}}|helion}}1.9528 AU
2.5518 AU
Eccentricity0.2347
Orbital period4.08 yr (1,489 days)
Mean anomaly351.55°
Mean motion0° 14m 30.48s / day
Inclination12.964°
Longitude of ascending node220.40°
37.179°
Physical characteristics
Mean diameter6.21 km (calculated)[6]
10.752±0.061 km[7][8]
Rotation period7.43019±0.00001 h[9]
Pole ecliptic latitude
  • (72.0°, −64.0°) (λ1/β1)[9]
  • (288.0°, −55.0°) (λ2/β2)[9]
Geometric albedo0.085±0.018[7][8]
0.20 (assumed)[6]
S (assumed)[6]
Absolute magnitude (H)13.3[7] · 13.4[4][6]


7835 Myroncope (prov. designation: 1993 MC) is an asteroid of the Mitidika family from the central region of the asteroid belt. It was discovered on 16 June 1993, by American astronomer Timothy Spahr at the Catalina Station in Arizona, United States. The assumed S-type asteroid has a rotation period of 7.4 hours and measures approximately 10 kilometers (6 miles) in diameter. It was named in memory of American sports announcer Myron Cope (1929–2008).[2][1]

Classification and orbit

Myroncope has been identified as a member of the Mitidika family, a dispersed asteroid family of typically carbonaceous C-type asteroids. The family is named after 2262 Mitidika (diameter of 9 km) and consists of 653 known members, the largest ones being 404 Arsinoë (95 km) and 5079 Brubeck (17 km).[5][10]:23

The asteroid orbits the Sun in the central main-belt at a distance of 2.0–3.2 AU once every 4 years and 1 month (1,489 days). Its orbit has an eccentricity of 0.23 and an inclination of 13° with respect to the ecliptic.[4] The first identification of this asteroid was made at the Japanese Geisei Observatory in 1990. However the observation was excluded from the asteroid's orbit determination and did not extend its observation arc prior to its discovery.[1]

Naming

This minor planet was named in memory of famed sports announcer and journalist Myron Cope (1929–2008). He was a color commentator for the Pittsburgh Steelers National Football League team for 35 years and was the creator of the Terrible Towel in 1975.[2][3] The naming citation was published by the Minor Planet Center on 20 May 2008 (M.P.C. 62928).[11]

Physical characteristics

Diameter and albedo

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Myroncope measures 10.8 kilometers in diameter and its surface has an albedo of 0.08.[7][8] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a smaller diameter of 6.2 kilometers based on an absolute magnitude of 13.4.[6]

Rotation period and poles

In 2016, the asteroid's lightcurve has been modeled using data from Lowell photometric database, which gave a sidereal rotation period of 7.43019 hours, as well as two spin axes of (72.0°, −64.0°) and (288.0°, −55.0°) in ecliptic coordinates (λ, β) ({{{1}}}).[9]

References

  1. ↑ 1.0 1.1 1.2 1.3 "7835 Myroncope (1993 MC)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=7835. 
  2. ↑ 2.0 2.1 2.2 Pete Zapadka (13 June 2008). "Double yoi! Out-of-this-world honor for Myron Cope". Pittsburgh Post-Gazette. http://www.post-gazette.com/steelers/2008/06/13/Double-yoi-Out-of-this-world-honor-for-Myron-Cope/stories/200806130169. 
  3. ↑ 3.0 3.1 Dan Gigler (12 June 2008). "And it will land on Cleveland ...". Pittsburgh Post-Gazette. http://old.post-gazette.com/pg/08164/889468-360.stm. 
  4. ↑ 4.0 4.1 4.2 4.3 "JPL Small-Body Database Browser: 7835 Myroncope (1993 MC)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2007835. 
  5. ↑ 5.0 5.1 "Asteroid 7835 Myroncope – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=7835+Myroncope#Asteroid%207835%20MyroncopeEAR-A-VARGBDET-5-NESVORNYFAM-V3.0. 
  6. ↑ 6.0 6.1 6.2 6.3 6.4 "LCDB Data for (7835) Myroncope". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=7835%7CMyroncope. 
  7. ↑ 7.0 7.1 7.2 7.3 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. doi:10.1088/0004-637X/741/2/90. Bibcode: 2011ApJ...741...90M. 
  8. ↑ 8.0 8.1 8.2 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. doi:10.1088/0004-637X/741/2/68. Bibcode: 2011ApJ...741...68M. 
  9. ↑ 9.0 9.1 9.2 9.3 Durech, J.; Hanus, J.; Oszkiewicz, D.; Vanco, R. (March 2016). "Asteroid models from the Lowell photometric database". Astronomy and Astrophysics 587: 6. doi:10.1051/0004-6361/201527573. Bibcode: 2016A&A...587A..48D. 
  10. ↑ Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families". Asteroids IV. pp. 297–321. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN 9780816532131. Bibcode: 2015aste.book..297N. 
  11. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html. 

External links



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