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1474 Beira

December 02, 2023

1474 Beira, provisional designation 1935 QY, is a bright carbonaceous asteroid and large Mars-crosser on an eccentric orbit from the asteroid belt, approximately 15 kilometers in diameter. It was discovered on 20 August 1935, by South African astronomer Cyril Jackson at the Union Observatory in Johannesburg.[3] The asteroid was named after the port city of Beira in Mozambique.[2]

1474 Beira
Discovery[1]
Discovered byC. Jackson
Discovery siteJohannesburg Obs.
Discovery date20 August 1935
Designations
(1474) Beira
Named after
Beira[2]
(city in Mozambique)
1935 QY · 1950 DQ
Mars-crosser[1][3][4]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc81.06 yr (29,606 d)
Aphelion4.0740 AU
Perihelion1.3920 AU
2.7330 AU
Eccentricity0.4907
4.52 yr (1,650 days)
19.609°
0° 13m 5.16s / day
Inclination26.683°
323.50°
84.070°
Physical characteristics
Dimensions8.73 km (calculated)[4]
14.9±1.5 km[5]
15±2 km[6]
15.46±1.55 km[7]
4.184±0.001 h[8][9][a]
4.184±0.002 h[10]
0.06±0.01[6]
0.064±0.013[7]
0.07±0.01[5]
0.20 (assumed)[4]
Tholen = FX[1]
SMASS = B[1][4]
B–V = 0.620[1]
U–B = 0.245[1]
12.66[1][4][5][6][7]

Orbit and classification edit

Beira is a Mars-crossing asteroid, a dynamically unstable group between the main belt and the near-Earth populations, crossing the orbit of Mars at 1.666 AU. It orbits the Sun at a distance of 1.4–4.1 AU once every 4 years and 6 months (1,650 days). Its orbit has a high eccentricity of 0.49 and an inclination of 27° with respect to the ecliptic.[1] The body's observation arc begins with its official discovery observation at Johannesburg in 1935.[3]

Physical characteristics edit

In the SMASS classification, Beira is a bright carbonaceous B-type asteroid, while in the Tholen classification its spectral type is ambiguous, closest to an F-type and somewhat similar to that of an X-type asteroid.[1]

Rotation period edit

Three rotational lightcurves of Beira were obtained from photometric observations. Lightcurve analysis gave a well-defined rotation period of 4.184 hours with a brightness amplitude between 0.15 and 0.24 magnitude (U=3/3/3).[8][9][10][a]

Diameter and albedo edit

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Beira measures between 14.9 and 15.46 kilometers in diameter and its surface has a low albedo between 0.06 and 0.07.[5][6][7] Conversely, the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and consequently calculates a smaller diameter of 8.73 kilometers using an absolute magnitude of 12.66.[4]

With a diameter close to 15 kilometers, Beira is larger than most sizeable Mars-crossing asteroids such as 1065 Amundsenia (9.75 km), 1139 Atami (9.35 km), 1011 Laodamia (7.39 km), 1727 Mette (est 9 km), 1131 Porzia (7.13 km), 1235 Schorria (est. 9 km), 985 Rosina (8.18 km) 1310 Villigera (15.24 km), and 1468 Zomba (7 km); but still smaller than the largest members of this dynamical group, namely, 132 Aethra, 323 Brucia, 1508 Kemi, 2204 Lyyli and 512 Taurinensis, which are larger than 20 kilometers in diameter (in one or other given source).

Naming edit

This minor planet was named after the port city of Beira in Mozambique.[2] The official naming citation was published by the Minor Planet Center in April 1953 (M.P.C. 909).[11]

Notes edit

  1. ^ a b Lightcurve plot of (1474) Beira, Robert Koff, Antelope Hills Observatory (H09). Summary figures at LCDB

References edit

  1. ^ a b c d e f g h i j "JPL Small-Body Database Browser: 1474 Beira (1935 QY)" (2016-09-09 last obs.). Jet Propulsion Laboratory. Retrieved 21 October 2017.
  2. ^ a b c Schmadel, Lutz D. (2007). "(1474) Beira". Dictionary of Minor Planet Names – (1474) Beira. Springer Berlin Heidelberg. p. 118. doi:10.1007/978-3-540-29925-7_1475. ISBN 978-3-540-00238-3.
  3. ^ a b c "1474 Beira (1935 QY)". Minor Planet Center. Retrieved 21 October 2017.
  4. ^ a b c d e f "LCDB Data for (1474) Beira". Asteroid Lightcurve Database (LCDB). Retrieved 21 October 2017.
  5. ^ a b c d Alí-Lagoa, V.; Licandro, J.; Gil-Hutton, R.; Cañ; ada-Assandri, M.; Delbo', M.; et al. (June 2016). "Differences between the Pallas collisional family and similarly sized B-type asteroids". Astronomy and Astrophysics. 591: 11. Bibcode:2016A&A...591A..14A. doi:10.1051/0004-6361/201527660. Retrieved 21 October 2017.
  6. ^ a b c d Alí-Lagoa, V.; de León, J.; Licandro, J.; Delbó, M.; Campins, H.; Pinilla-Alonso, N.; et al. (June 2013). "Physical properties of B-type asteroids from WISE data". Astronomy and Astrophysics. 554: 16. arXiv:1303.5487. Bibcode:2013A&A...554A..71A. doi:10.1051/0004-6361/201220680. Retrieved 21 October 2017.
  7. ^ a b c d Alí-Lagoa, V.; Delbo', M. (July 2017). "Sizes and albedos of Mars-crossing asteroids from WISE/NEOWISE data" (PDF). Astronomy and Astrophysics. 603: 8. arXiv:1705.10263. Bibcode:2017A&A...603A..55A. doi:10.1051/0004-6361/201629917. Retrieved 21 October 2017.
  8. ^ a b Strabla, Luca; Quadri, Ulisse; Girelli, Robert (April 2013). "Asteroid Observed from Bassano Bresciano Observatory 2012 August-September". The Minor Planet Bulletin. 40 (2): 83–84. Bibcode:2013MPBu...40...83S. ISSN 1052-8091. Retrieved 21 October 2017.
  9. ^ a b Koff, Robert A. (June 2004). "Lightcurve photometry of Mars-crossing asteroids 1474 Beira and 3674 Erbisbuhl". The Minor Planet Bulletin. 31 (2): 33–34. Bibcode:2004MPBu...31...33K. ISSN 1052-8091. Retrieved 21 October 2017.
  10. ^ a b Apostolovska, Gordana; Ivanova, Violeta; Borisov, Galin (June 2004). "Lightcurves and rotational periods of 1474 Beira, 1309 Hyperborea, and 2525 O'Steen". The Minor Planet Bulletin. 31 (2): 44–45. Bibcode:2004MPBu...31...44A. ISSN 1052-8091. Retrieved 21 October 2017.
  11. ^ Schmadel, Lutz D. (2009). "Appendix – Publication Dates of the MPCs". Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008). Springer Berlin Heidelberg. p. 221. doi:10.1007/978-3-642-01965-4. ISBN 978-3-642-01964-7.

External links edit

  • Asteroid Lightcurve Database (LCDB), query form (info 2017-12-16 at the Wayback Machine)
  • 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
  • 1474 Beira at AstDyS-2, Asteroids—Dynamic Site
    • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
  • 1474 Beira at the JPL Small-Body Database
    • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

December 02, 2023
1474, beira, provisional, designation, 1935, bright, carbonaceous, asteroid, large, mars, crosser, eccentric, orbit, from, asteroid, belt, approximately, kilometers, diameter, discovered, august, 1935, south, african, astronomer, cyril, jackson, union, observa. 1474 Beira provisional designation 1935 QY is a bright carbonaceous asteroid and large Mars crosser on an eccentric orbit from the asteroid belt approximately 15 kilometers in diameter It was discovered on 20 August 1935 by South African astronomer Cyril Jackson at the Union Observatory in Johannesburg 3 The asteroid was named after the port city of Beira in Mozambique 2 1474 BeiraDiscovery 1 Discovered byC JacksonDiscovery siteJohannesburg Obs Discovery date20 August 1935DesignationsMPC designation 1474 BeiraNamed afterBeira 2 city in Mozambique Alternative designations1935 QY 1950 DQMinor planet categoryMars crosser 1 3 4 Orbital characteristics 1 Epoch 4 September 2017 JD 2458000 5 Uncertainty parameter 0Observation arc81 06 yr 29 606 d Aphelion4 0740 AUPerihelion1 3920 AUSemi major axis2 7330 AUEccentricity0 4907Orbital period sidereal 4 52 yr 1 650 days Mean anomaly19 609 Mean motion0 13m 5 16s dayInclination26 683 Longitude of ascending node323 50 Argument of perihelion84 070 Physical characteristicsDimensions8 73 km calculated 4 14 9 1 5 km 5 15 2 km 6 15 46 1 55 km 7 Synodic rotation period4 184 0 001 h 8 9 a 4 184 0 002 h 10 Geometric albedo0 06 0 01 6 0 064 0 013 7 0 07 0 01 5 0 20 assumed 4 Spectral typeTholen FX 1 SMASS B 1 4 B V 0 620 1 U B 0 245 1 Absolute magnitude H 12 66 1 4 5 6 7 Contents 1 Orbit and classification 2 Physical characteristics 2 1 Rotation period 2 2 Diameter and albedo 3 Naming 4 Notes 5 References 6 External linksOrbit and classification editBeira is a Mars crossing asteroid a dynamically unstable group between the main belt and the near Earth populations crossing the orbit of Mars at 1 666 AU It orbits the Sun at a distance of 1 4 4 1 AU once every 4 years and 6 months 1 650 days Its orbit has a high eccentricity of 0 49 and an inclination of 27 with respect to the ecliptic 1 The body s observation arc begins with its official discovery observation at Johannesburg in 1935 3 Physical characteristics editIn the SMASS classification Beira is a bright carbonaceous B type asteroid while in the Tholen classification its spectral type is ambiguous closest to an F type and somewhat similar to that of an X type asteroid 1 Rotation period edit Three rotational lightcurves of Beira were obtained from photometric observations Lightcurve analysis gave a well defined rotation period of 4 184 hours with a brightness amplitude between 0 15 and 0 24 magnitude U 3 3 3 8 9 10 a Diameter and albedo edit According to the survey carried out by the NEOWISE mission of NASA s Wide field Infrared Survey Explorer Beira measures between 14 9 and 15 46 kilometers in diameter and its surface has a low albedo between 0 06 and 0 07 5 6 7 Conversely the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0 20 and consequently calculates a smaller diameter of 8 73 kilometers using an absolute magnitude of 12 66 4 With a diameter close to 15 kilometers Beira is larger than most sizeable Mars crossing asteroids such as 1065 Amundsenia 9 75 km 1139 Atami 9 35 km 1011 Laodamia 7 39 km 1727 Mette est 9 km 1131 Porzia 7 13 km 1235 Schorria est 9 km 985 Rosina 8 18 km 1310 Villigera 15 24 km and 1468 Zomba 7 km but still smaller than the largest members of this dynamical group namely 132 Aethra 323 Brucia 1508 Kemi 2204 Lyyli and 512 Taurinensis which are larger than 20 kilometers in diameter in one or other given source Naming editThis minor planet was named after the port city of Beira in Mozambique 2 The official naming citation was published by the Minor Planet Center in April 1953 M P C 909 11 Notes edit a b Lightcurve plot of 1474 Beira Robert Koff Antelope Hills Observatory H09 Summary figures at LCDBReferences edit a b c d e f g h i j JPL Small Body Database Browser 1474 Beira 1935 QY 2016 09 09 last obs Jet Propulsion Laboratory Retrieved 21 October 2017 a b c Schmadel Lutz D 2007 1474 Beira Dictionary of Minor Planet Names 1474 Beira Springer Berlin Heidelberg p 118 doi 10 1007 978 3 540 29925 7 1475 ISBN 978 3 540 00238 3 a b c 1474 Beira 1935 QY Minor Planet Center Retrieved 21 October 2017 a b c d e f LCDB Data for 1474 Beira Asteroid Lightcurve Database LCDB Retrieved 21 October 2017 a b c d Ali Lagoa V Licandro J Gil Hutton R Can ada Assandri M Delbo M et al June 2016 Differences between the Pallas collisional family and similarly sized B type asteroids Astronomy and Astrophysics 591 11 Bibcode 2016A amp A 591A 14A doi 10 1051 0004 6361 201527660 Retrieved 21 October 2017 a b c d Ali Lagoa V de Leon J Licandro J Delbo M Campins H Pinilla Alonso N et al June 2013 Physical properties of B type asteroids from WISE data Astronomy and Astrophysics 554 16 arXiv 1303 5487 Bibcode 2013A amp A 554A 71A doi 10 1051 0004 6361 201220680 Retrieved 21 October 2017 a b c d Ali Lagoa V Delbo M July 2017 Sizes and albedos of Mars crossing asteroids from WISE NEOWISE data PDF Astronomy and Astrophysics 603 8 arXiv 1705 10263 Bibcode 2017A amp A 603A 55A doi 10 1051 0004 6361 201629917 Retrieved 21 October 2017 a b Strabla Luca Quadri Ulisse Girelli Robert April 2013 Asteroid Observed from Bassano Bresciano Observatory 2012 August September The Minor Planet Bulletin 40 2 83 84 Bibcode 2013MPBu 40 83S ISSN 1052 8091 Retrieved 21 October 2017 a b Koff Robert A June 2004 Lightcurve photometry of Mars crossing asteroids 1474 Beira and 3674 Erbisbuhl The Minor Planet Bulletin 31 2 33 34 Bibcode 2004MPBu 31 33K ISSN 1052 8091 Retrieved 21 October 2017 a b Apostolovska Gordana Ivanova Violeta Borisov Galin June 2004 Lightcurves and rotational periods of 1474 Beira 1309 Hyperborea and 2525 O Steen The Minor Planet Bulletin 31 2 44 45 Bibcode 2004MPBu 31 44A ISSN 1052 8091 Retrieved 21 October 2017 Schmadel Lutz D 2009 Appendix Publication Dates of the MPCs Dictionary of Minor Planet Names Addendum to Fifth Edition 2006 2008 Springer Berlin Heidelberg p 221 doi 10 1007 978 3 642 01965 4 ISBN 978 3 642 01964 7 External links editAsteroid Lightcurve Database LCDB query form info Archived 2017 12 16 at the Wayback Machine Dictionary of Minor Planet Names Google books Asteroids and comets rotation curves CdR Observatoire de Geneve Raoul Behrend Discovery Circumstances Numbered Minor Planets 1 5000 Minor Planet Center 1474 Beira at AstDyS 2 Asteroids Dynamic Site Ephemeris Observation prediction Orbital info Proper elements Observational info 1474 Beira at the JPL Small Body DatabaseClose approach Discovery Ephemeris Orbit diagram Orbital elements Physical parameters Retrieved from https en wikipedia org w index php title 1474 Beira amp oldid 1123252253, wikipedia, wiki, book, books, library,

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