845 Naëma
| Discovery Perihelion | 2.7324 AU | |
|---|---|---|
| 2.9381 AU | ||
| Eccentricity | 0.0700 | |
| 5.04 yr (1,840 d) | ||
| 265.75° | ||
| 0° 11m 44.52s / day | ||
| Inclination | 12.610° | |
| 43.144° | ||
| 294.62° | ||
| Physical characteristics | ||
| Dimensions | 63.1 km × 42.5 km | |
Mean diameter | ||
Synodic rotation period | 20.892±0.019 h[10] | |
| 10.20[1][3] | ||
845 Naëma (rotation period of 20.9 hours and measures approximately 54 kilometers (34 miles) in diameter on average, as it is likely elongated in shape. Any reference of the asteroid's name to a person is unknown.[2]
Orbit and classification
Naëma is the
Nesvorný,[5] as well as Milani and Knežević (AstDyS)[4] The family was first detected by Vincenzo Zappalà in 1994/95.[13]
Naëma orbits the Sun in the
Heidelberg Observatory on 16 November 1916.[1]
Naming
Naëma is a German variant of the biblical name
Naomi.[14] However, any reference of this minor planet's name to a person or occurrence is unknown.[2]
Unknown meaning
Among the many thousands of
Karl Reinmuth.[15]
Physical characteristics
In the Bus–Binzel
Naëma family.[11]
: 23
Rotation period
In September 2006, a rotational
U=1).[17]
Diameter and albedo
According to the surveys carried out by the
mean diameter measurements published by the WISE team include (47.19±13.93 km), (52.419±20.30 km), (52.91±11.64 km), (56.933±0.338 km) and (60.12±2.45 km) with corresponding albedos of (0.06±0.05), (0.0417±0.0296), (0.04±0.02), (0.0718±0.0189) and (0.041±0.006).[16][18]
Several
asteroid occultations of Naëma have been observed between 2002 and 2010. The best-rated one from 10 April 2010, gave a best-fit ellipse dimension of (63.1 km × 42.5 km).[16]
These timed observations are taken when the asteroid passes in front of a distant star.
References
- ^ a b c d e "845 Naema (A916 WM)". Minor Planet Center. Retrieved 7 March 2020.
- ^ ISBN 978-3-540-00238-3.
- ^ a b c d e "JPL Small-Body Database Browser: 845 Naema (A916 WM)" (2020-02-03 last obs.). Jet Propulsion Laboratory. Retrieved 7 March 2020.
- ^ a b "Asteroid 845 Naema – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 7 March 2020.
- ^ a b "Asteroid 845 Naema – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. Retrieved 7 March 2020.
- ^ Bibcode:2016PDSS..247.....M. Retrieved 7 March 2020.
- ^ .
- ^ Bibcode:2004PDSS...12.....T. Retrieved 7 March 2020.
- ^ )
- ^ ISSN 1052-8091. Archived from the original(PDF) on 13 February 2020. Retrieved 7 March 2020.
- ^ ISBN 9780816532131.
- ^ Zappalà, V.; Bendjoya, Ph.; Cellino, A.; Farinella, P.; Froeschle, C. (1997). "Asteroid Dynamical Families". NASA Planetary Data System: EAR-A-5-DDR-FAMILY-V4.1. Retrieved 4 March 2020.} (PDS main page)
- ISSN 0019-1035.
- ^ Nicodemus Frischlin (1606) Methodus declamandi posthuma, in laudatione, thesi de laudibus mulierum demonstrata, p. 165-166
- ISBN 978-3-540-00238-3.
- ^ a b c "Asteroid 845 Naema". Small Bodies Data Ferret. Retrieved 7 March 2020.
- ^ Behrend, Raoul. "Asteroids and comets rotation curves – (845) Naema". Geneva Observatory. Retrieved 7 March 2020.
- ^ a b "LCDB Data for (845) Naëma". Asteroid Lightcurve Database (LCDB). Retrieved 7 March 2020.
External links
- Lightcurve Database Query (LCDB), at www.minorplanet.info
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 845 Naëma at AstDyS-2, Asteroids—Dynamic Site
- 845 Naëma at the JPL Small-Body Database
