547 Praxedis

547 Praxedis
Discovery [1][2]
Discovered by P. Götz
Discovery site Heidelberg Obs.
Discovery date 14 October 1904
Designations
MPC designation (547) Praxedis
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 arc 112.72 yr (41,171 days)
Aphelion 3.4304 AU
Perihelion 2.1237 AU
2.7770 AU
Eccentricity 0.2353
4.63 yr (1,690 days)
161.79°
0° 12m 46.8s / day
Inclination 16.899°
193.21°
195.64°
Physical characteristics
Dimensions 52.462±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 (1857). 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]

    Its star code is HIP 221126 mag 13.4.[6] The most recent passing of Praxedis was on September 23, 2015 at 02:11UT. Much of eastern Europe and Russia had view of the asteroid.[6]

    References

    1. 1 2 3 4 5 6 7 8 9 10 11 12 13 "JPL Small-Body Database Browser: 547 Praxedis (1904 PB)" (2017-07-05 last obs.). Jet Propulsion Laboratory. Retrieved 19 October 2017.
    2. 1 2 "547 Praxedis (1904 PB)". Minor Planet Center. Retrieved 19 October 2017.
    3. ↑ Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (547) Praxedis. Springer Berlin Heidelberg. p. 57. ISBN 978-3-540-00238-3. Retrieved 19 October 2017.
    4. 1 2 "Small Bodies Data Ferret". Nesvorny HCM Asteroid Families V3.0. Retrieved 19 October 2017.
    5. ↑ Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families" (PDF). Asteroids IV: 297–321. arXiv:1502.01628. Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. Retrieved 19 October 2017.
    6. 1 2 "(547) Praxedis / HIP 22129 event on 2015 Sep 23, 02:11 UT". www.asteroidoccultation.com. Retrieved 2015-10-01.
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