1253 Frisia

1253 FrisiaDiscovery[1]

Discovered by| K. Reinmuth
Discovery site| Heidelberg Obs.
Discovery date| 9 October 1931
Designations

MPC designation

| (1253) Frisia
Pronunciation| /ˈfrɪziə/[5]
Named after| Frisia * Frisian Islands
(Home of the Frisian people)[2]

Alternative designations

| 1931 TV1 * 1933 BO
1937 VN * 1948 SE
1954 UC * 1959 RC
1971 UE3
Minor planet category| main-belt * (outer)
Themis[3][4]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc| 85.48 yr (31,220 days)
|{{{apsis}}}|helion}}| 3.8295 AU
|{{{apsis}}}|helion}}| 2.4952 AU

Semi-major axis

| 3.1624 AU
Eccentricity| 0.2110
Orbital period| 5.62 yr (2,054 days)
Mean anomaly| 78.227°
Mean motion| 0° 10m 31.08s / day
Inclination| 1.3468°
Longitude of ascending node| 40.015°

|{{{apsis}}}|helion}}

| 355.23°
Physical characteristics
Dimensions| 18.71 km (calculated)[3]
19.09±0.19 km[6]
21.682±0.043 km[7]
22.995±0.121 km[8]
24.00±7.16 km[9]
Rotation period| 14.557±0.002 h[10]
18.500±0.0096 h[11]
Geometric albedo| 0.04±0.03[9]
0.077±0.012[6]
0.08 (assumed)[3]
0.0839±0.0105[8]

Spectral type

| C (assumed)[3]
Absolute magnitude (H)| 11.5[8] * 12.00[1][3][6] * 12.02±0.26[12] * 12.088±0.001 (R)[11] * 12.13[9]

1253 Frisia, provisional designation 1931 TV1, is a carbonaceous Themistian asteroid from the outer regions of the asteroid belt, approximately 20 kilometers in diameter. Discovered by Karl Reinmuth at Heidelberg Observatory in 1931, the asteroid was later named after the region of Frisia and the Frisian Islands.[2]

## Contents

* 1 Discovery
* 2 Orbit and classification
* 3 Physical characteristics
* 3.1 Rotation period
* 3.2 Diameter and albedo
* 4 Naming
* 5 References
* 6 External links

## Discovery

Frisia was discovered on 9 October 1931, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany.[13] It was independently discovered by Soviet astronomer Pelageya Shajn at the Simeiz Observatory on the Crimean peninsula on 6 November 1931.[2] The body's observation arc begins at Heidelberg eleven days after its official discovery observation.[13]

## Orbit and classification

Frisia is a Themistian asteroid that belongs to the Themis family (602),[3][4] a very large family of carbonaceous asteroids, named after 24 Themis.[14]: 23 It orbits the Sun in the outer main-belt at a distance of 2.5–3.8 AU once every 5 years and 7 months (2,054 days). Its orbit has an eccentricity of 0.21 and an inclination of 1° with respect to the ecliptic.[1]

## Physical characteristics

Frisia is an assumed carbonaceous C-type asteroid,[3] which corresponds to the overall spectral type of the Themis family.[14]: 23

### Rotation period

In November 2011, a rotational lightcurve of Frisia was obtained by astronomers at the University of North Dakota (730) and the Badlands Observatory in North Dakota, United States. Lightcurve analysis gave a rotation period of 14.557 hours with a brightness variation of 0.16 magnitude ({{{1}}}).[10] Photometric observations in the R-band at the Palomar Transient Factory in September 2011, gave a somewhat similar period of 18.500 hours and an amplitude of 0.15 magnitude ({{{1}}}).[11]

### Diameter and albedo

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Frisia measures between 19.09 and 24.00 kilometers in diameter and its surface has an albedo between 0.04 and 0.0839.[6][7][8][9]

The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.08 and calculates a diameter of 18.71 kilometers based on an absolute magnitude of 12.0.[3]

## Naming

This minor planet was named after region of Frisia and its Frisian Islands, located on the southeastern coast of the North Sea. The region is the homeland of the Frisian people and mostly part of the Netherlands but its islands stretch along the coast up to Germany and Denmark. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 115).[2]

## References

1. ↑ 1.0 1.1 1.2 1.3 "JPL Small-Body Database Browser: 1253 Frisia (1931 TV1)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001253. Retrieved 19 September 2017.
2. ↑ 2.0 2.1 2.2 2.3 Schmadel, Lutz D. (2007). "(1253) Frisia". Dictionary of Minor Planet Names – (1253) Frisia. Springer Berlin Heidelberg. p. 104. doi:10.1007/978-3-540-29925-7_1254. ISBN 978-3-540-00238-3.
3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 "LCDB Data for (1253) Frisia". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1253|Frisia. Retrieved 19 September 2017.
4. ↑ 4.0 4.1 "Asteroid 1253 Frisia – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1253+Frisia#Asteroid 1253 FrisiaEAR-A-VARGBDET-5-NESVORNYFAM-V3.0. Retrieved 26 October 2019.
5. ↑ Frisian (3rd ed.), Oxford University Press, September 2005, http://oed.com/search?searchType=dictionary&q=Frisian (Subscription or UK public library membership required.)
6. ↑ 6.0 6.1 6.2 6.3 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. doi:10.1088/2041-8205/759/1/L8. Bibcode: 2012ApJ...759L...8M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...759L...8M. Retrieved 19 September 2017.
7. ↑ 7.0 7.1 Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R. et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal 791 (2): 11. doi:10.1088/0004-637X/791/2/121. Bibcode: 2014ApJ...791..121M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014ApJ...791..121M. Retrieved 19 September 2017.
8. ↑ 8.0 8.1 8.2 8.3 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D. et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal 741 (2): 25. doi:10.1088/0004-637X/741/2/90. Bibcode: 2011ApJ...741...90M.
9. ↑ 9.0 9.1 9.2 9.3 Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T. et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos". The Astronomical Journal 152 (3): 12. doi:10.3847/0004-6256/152/3/63. Bibcode: 2016AJ....152...63N.
10. ↑ 10.0 10.1 Gartrelle, Gordon M. (April 2012). "Lightcurve Results for Eleven Asteroids". The Minor Planet Bulletin 39 (2): 40%–46. ISSN 1052-8091. Bibcode: 2012MPBu...39...40G. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012MPBu...39...40G. Retrieved 19 September 2017.
11. ↑ 11.0 11.1 11.2 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. doi:10.1088/0004-6256/150/3/75. Bibcode: 2015AJ....150...75W. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015AJ....150...75W. Retrieved 19 September 2017.
12. ↑ 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. doi:10.1016/j.icarus.2015.08.007. Bibcode: 2015Icar..261...34V. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015Icar..261...34V. Retrieved 19 September 2017.
13. ↑ 13.0 13.1 "1253 Frisia (1931 TV1)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=1253. Retrieved 19 September 2017.
14. ↑ 14.0 14.1 Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families". Asteroids IV: 297–321. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN 9780816532131. Bibcode: 2015aste.book..297N.

## External links

* Asteroid Lightcurve Database (LCDB), query form (info )
* Dictionary of Minor Planet Names, Google books
* Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
* Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
* 1253 Frisia at AstDyS-2, Asteroids—Dynamic Site
* Ephemeris * Observation prediction * Orbital info * Proper elements * Observational info
* 1253 Frisia at the JPL Small-Body Database
* Close approach * Discovery * Ephemeris * Orbit diagram * Orbital elements * Physical parameters

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