Movatterモバイル変換

[0]ホーム
URL:

Jump to content
WikipediaThe Free Encyclopedia
Search

154 Bertha

From Wikipedia, the free encyclopedia
Main-belt asteroid

154 Bertha
Discovery[1]
Discovered byP. M. Henry
Discovery date4 November 1875
Designations
(154) Bertha
Pronunciation/ˈbɜːrθə/[2]
A875 VD
Main belt
Orbital characteristics[3][4]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc130.75 yr (47758 d)
Aphelion3.44 AU (515.21 Gm)
Perihelion2.95 AU (441.30 Gm)
3.20 AU (478.26 Gm)
Eccentricity0.077261
5.72 years (2,087.9 d)
16.63 km/s
125.046°
0° 10m 20.734s / day
Inclination20.9724°
36.7441°
159.722°
Earth MOID1.95 AU (291.94 Gm)
Jupiter MOID1.53 AU (229.03 Gm)
TJupiter3.087
Physical characteristics
Dimensions184.93±3.6 km[3]
186.85±1.83 km[5]
Mass(9.19±5.20)×1018 kg[5]
2.69±1.52 g/cm3[5]
0.0517 m/s²
Equatorialescape velocity
0.0978 km/s
25.224 h (1.0510 d)[3][6]
0.0480±0.002[3]
0.0483 ± 0.0107[7]
Temperature~156K
C[7]
7.58,[3] 7.530[7]

154 Bertha is amain-beltasteroid. It was discovered by the French brothersPaul Henry and Prosper Henry on 4 November 1875, but the credit for the discovery was given to Prosper. It is probably named afterBerthe Martin-Flammarion, sister of the astronomerCamille Flammarion.[8]

Observations performed at the Palmer Divide Observatory inColorado Springs, Colorado in during 2007 produced alight curve with a period of 22.30 ± 0.03 hours and a brightness range of 0.10 ± 0.02 inmagnitude. A 1998 measurement gave a value of 27.6 hours, which doesn't fit the PDO data.[9] In 2011, observations from the Organ Mesa Observatory inLas Cruces, New Mexico were used to determine a rotation period of 25.224 ± 0.002 hours with a brightness variability of 0.10 ± 0.01 magnitude, ruling out previous studies.[6]

This is classified as aC-type asteroid[7] and it has an estimated diameter of about 187 km.[5]

References

[edit]
  1. ^"Discovery Circumstances: Numbered Minor Planets". International Astronomical Union - Minor Planet Center.
  2. ^"Bertha".Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription orparticipating institution membership required.)
  3. ^abcdeYeomans, Donald K.,"154 Bertha",JPL Small-Body Database Browser,NASA Jet Propulsion Laboratory, retrieved12 May 2016.
  4. ^"The Asteroid Orbital Elements Database".astorb.Lowell Observatory.
  5. ^abcdCarry, B. (December 2012), "Density of asteroids",Planetary and Space Science, vol. 73, pp. 98–118,arXiv:1203.4336,Bibcode:2012P&SS...73...98C,doi:10.1016/j.pss.2012.03.009. See Table 1.
  6. ^abPilcher, Frederick (April 2012), "Rotation Period Determinations for 31 Euphrosyne, 65 Cybele, 154 Bertha 177 Irma, 200 Dynamene, 724 Hapag, 880 Herba, and 1470 Carla",The Minor Planet Bulletin, vol. 39, no. 2, pp. 57–60,Bibcode:2012MPBu...39...57P.
  7. ^abcdPravec, P.; et al. (May 2012), "Absolute Magnitudes of Asteroids and a Revision of Asteroid Albedo Estimates from WISE Thermal Observations",Asteroids, Comets, Meteors 2012, Proceedings of the conference held May 16–20, 2012 in Niigata, Japan, no. 1667,Bibcode:2012LPICo1667.6089P. See Table 4.
  8. ^Schmadel, Lutz D. (2012),Dictionary of Minor Planet Names (6th ed.), Springer, p. 27,ISBN 3642297188.
  9. ^Warner, Brian D. (September 2007), "Asteroid Lightcurve Analysis at the Palmer Divide Observatory",The Minor Planet Bulletin,Bibcode:2007MPBu...34...72W.

External links

[edit]
Minor planets
Asteroid
Distant minor planet
Comets
Other
Authority control databasesEdit this at Wikidata


Stub icon

This article about a C-type asteroid native to theasteroid belt is astub. You can help Wikipedia byadding missing information.

Retrieved from "https://en.wikipedia.org/w/index.php?title=154_Bertha&oldid=1324355231"
Categories:
Hidden categories:
[8]ページ先頭
©2009-2026 Movatter.jp