547 Praxedis

547 Praxedis
Discovery [1][2]
Discovered byP. Götz
Discovery siteHeidelberg Obs.
Discovery date14 October 1904
Designations
(547) Praxedis
Pronunciation/prækˈsiːdɪs/ (Πραξηδίς)
Named after
Novel character [3]
(Joseph Victor von Scheffel)
1904 PB
main-belt · (middle)
Postrema [4]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc112.72 yr (41,171 days)
Aphelion3.4304 AU
Perihelion2.1237 AU
2.7770 AU
Eccentricity0.2353
4.63 yr (1,690 days)
161.79°
0° 12m 46.8s / day
Inclination16.899°
193.21°
195.64°
Physical characteristics
Dimensions52.462±1.716 km[1]
9.105 h (0.3794 d)[1]
0.101±0.009[1]
Tholen = XD: [1]
SMASS = Xk [1]
B–V = 0.761[1]
U–B = 0.254[1]
9.52[1]

547 Praxedis, provisional designation 1904 PB, is a Postremian asteroid from the central regions of the asteroid belt, approximately 52 kilometers in diameter.

Description

The asteroid was discovered on 14 October 1904, by astronomer Paul Götz at the Heidelberg-Königstuhl State Observatory in southwest Germany.[2] It was named from literature after the character "Praxedis" in Joseph Victor von Scheffel's historical romance Ekkehard (1855). The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 58).

Praxedis is a member of the Postrema family (541),[4] a mid-sized central asteroid family of little more than 100 members.[5]: 23  It orbits the Sun in the central main-belt at a distance of 2.1–3.4 AU once every 4 years and 8 months (1,690 days). Its orbit has an eccentricity of 0.24 and an inclination of 17° with respect to the ecliptic.[1]

In the Tholen classification, Praxedis has an ambiguous spectral type, closest to an X-type and somewhat similar to that of a darker D-type asteroid. In the SMASS classification it is a Xk-subtype that transitions from the X- to the rare K-type asteroids.[1] According to the survey carried out by NASA's Wide-field Infrared Survey Explorer, Praxedis measures 52.462 kilometers in diameter and its surface has an albedo of 0.101.[1]

References

  1. ^ a b c d e f g h i j k l m "JPL Small-Body Database Browser: 547 Praxedis (1904 PB)" (2017-07-05 last obs.). Jet Propulsion Laboratory. Retrieved 19 October 2017.
  2. ^ a b "547 Praxedis (1904 PB)". Minor Planet Center. Retrieved 19 October 2017.
  3. ^ Schmadel, Lutz D. (2007). "(547) Praxedis". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 57. doi:10.1007/978-3-540-29925-7_548. ISBN 978-3-540-00238-3.
  4. ^ a b "Asteroid 547 Praxedis – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. Retrieved 24 October 2019.
  5. ^ Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families". Asteroids IV. pp. 297–321. arXiv:1502.01628. Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN 9780816532131.

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