7655 Adamries

7655 Adamries
Discovery [1]
Discovered by F. Börngen
Discovery site Karl Schwarzschild Obs.
Discovery date 28 December 1991
Designations
MPC designation 7655 Adamries
Named after
 Adam Ries
(mathematician)[2]
1991 YM1 · 1977 BW
main-belt · Nysa [3]
Orbital characteristics [1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 38.49 yr (14,058 days)
Aphelion 2.7493 AU
Perihelion 2.0837 AU
2.4165 AU
Eccentricity 0.1377
3.76 yr (1,372 days)
184.61°
0° 15m 44.28s / day
Inclination 4.0159°
103.41°
9.0310°
Physical characteristics
Dimensions 3.60 km (calculated)[3]
4.21±0.96 km[4]
22.8758±0.1133 h[5]
0.21 (assumed)[3]
0.250±0.124[4]
C [6] · S [3]
14.00[4]
14.081±0.004 (R)[5]
14.1[1]
14.53[3]
14.56±0.26[6]

    7655 Adamries, provisional designation 1991 YM1, is a Nysa asteroid from the inner regions of the asteroid belt, approximately 4 kilometers in diameter. It was discovered on 28 December 1991, by German astronomer Freimut Börngen at Karl Schwarzschild Observatory in Tautenburg, eastern Germany.[7]

    The asteroid is a member of the Nysa family, one of the smaller families in the main-belt, named after its namesake, 44 Nysa. It orbits the Sun at a distance of 2.1–2.7 AU once every 3 years and 9 months (1,372 days). Its orbit has an eccentricity of 0.14 and an inclination of 4° with respect to the ecliptic.[1] Adamries was first identified as "1977 BW" at CrAO/Nauchnyj in 1977, extending the asteroid's observation arc by 15 years prior to its official discovery observation.[7]

    A rotational light-curve was obtained from photometric observation made at the U.S. Palomar Transient Factory, California, in September 2013. It showed an above average rotation period of 22.8758±0.1133 hours with a brightness variation of 0.33 magnitude (U=2).[5] The body's spectral type is unclear, as the Collaborative Asteroid Lightcurve Link (CALL) and Pan-STARRS' large-scale survey classify it as a S-type and C-type asteroid, respectively.[3][6] According to the survey carried out by NASA's space-based Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the asteroid measures 4.2 kilometers in diameter and its surface has an albedo of 0.25,[4] while CALL assumes a standard albedo for stony asteroids of 0.21 and calculates a diameter of 3.6 kilometers.[3]

    The minor planet was named in honor of famous German mathematician Adam Ries (1492–1559), who wrote the first German arithmetic book in the 16th century, explaining in simple terms to the common people how to do arithmetic. At the time, this was considered to be difficult. This minor planet was the 100th numbered discovery of astronomer Freimut Börngen.[2] Naming citation was published on 18 August 1997 (M.P.C. 30478).[8] This minor planet should not be confused with 236305 Adamriess, named after American astronomer and 2011 Nobel Prize winner Adam Riess.

    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 7655 Adamries (1991 YM1)" (2015-07-18 last obs.). Jet Propulsion Laboratory. Retrieved 29 April 2016.
    2. 1 2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (7655) Adamries. Springer Berlin Heidelberg. p. 608. ISBN 978-3-540-00238-3. Retrieved 29 April 2016.
    3. 1 2 3 4 5 6 7 "LCDB Data for (7655) Adamries". Asteroid Lightcurve Database (LCDB). Retrieved 29 April 2016.
    4. 1 2 3 4 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. arXiv:1209.5794Freely accessible. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 29 April 2016.
    5. 1 2 3 Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal. 150 (3): 35. arXiv:1504.04041Freely accessible. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 29 April 2016.
    6. 1 2 3 Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762Freely accessible. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 29 April 2016.
    7. 1 2 "7655 Adamries (1991 YM1)". Minor Planet Center. Retrieved 29 April 2016.
    8. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 29 April 2016.

    External links

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