5040 Rabinowitz

5040 RabinowitzDiscovery [1]

Discovered by| T. Gehrels
Discovery site| Palomar Obs.
Discovery date| 15 September 1972
Designations

MPC designation

| (5040) Rabinowitz
Named after| David Rabinowitz
(American astronomer)[2]

Alternative designations

| 1972 RF * 1987 QE
Minor planet category| main-belt * Phocaea [3][4]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc| 46.20 yr (16,874 days)
|{{{apsis}}}|helion}}| 2.9644 AU
|{{{apsis}}}|helion}}| 1.8705 AU

Semi-major axis

| 2.4174 AU
Eccentricity| 0.2263
Orbital period| 3.76 yr (1,373 days)
Mean anomaly| 7.0892°
Mean motion| 0° 15m 43.92s / day
Inclination| 24.361°
Longitude of ascending node| 175.69°

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

| 149.71°
Physical characteristics
Dimensions| 6.41 km (calculated)[3]
Rotation period| 4.472±0.001 h[5]
4.6901±0.0004 h[lower-alpha 1]
4.691±0.001 h[6]
Geometric albedo| 0.23 (assumed)[3]

Spectral type

| S [3]
Absolute magnitude (H)| 12.73±0.13 (R)[lower-alpha 1] * 12.9[1] * 13.15±0.35[7] * 13.18[3]

5040 Rabinowitz, provisional designation 1972 RF, is a stony Phocaea asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered by Dutch–American astronomer Tom Gehrels at Palomar Observatory on 15 September 1972.[8] Contrary to most of his discoveries, this asteroid is unrelated to the Palomar–Leiden survey and exclusively credited to Tom Gehrels.

## Contents

* 1 Orbit and classification
* 2 Physical characteristics
* 2.1 Rotation period
* 2.2 Diameter and albedo
* 3 Naming
* 4 Notes
* 5 References
* 6 External links

## Orbit and classification

The stony S-type asteroid is a member of the Phocaea family (701), a group of asteroids with similar orbital characteristics, named after its largest member, 25 Phocaea.[4] It orbits the Sun in the inner main-belt at a distance of 1.9–3.0 AU once every 3 years and 9 months (1,373 days). Its orbit has an eccentricity of 0.23 and an inclination of 24° with respect to the ecliptic.[1] A first precovery was taken at the discovering observatory in 1971, extending the body's observation arc by one year prior to its official discovery observation.[8]

## Physical characteristics

### Rotation period

In July 2013, a rotational lightcurve for this asteroid was obtained from photometric observations by Czech astronomer Petr Pravec at the Ondřejov Observatory. The well-defined lightcurve gave a rotation period of 4.6901±0.0004 hours with a brightness variation of 0.33 in magnitude ({{{1}}}).[lower-alpha 1]

During the same opposition opportunity, two more lightcurves – obtained by Robert Stephens at the Center for Solar System Studies and by Maurice Clark at the Preston Gott Observatory – gave a similar period of 4.691 and 4.472 hours, with an amplitude of 0.35 and 0.31 in magnitude, respectively ({{{1}}}).[5][6]

### Diameter and albedo

The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.23, derived from the Phocaea family's namesake, and calculates a diameter of 6.4 kilometers with an absolute magnitude of 13.18.[3]

## Naming

This minor planet was named after American astronomer David Rabinowitz (born 1960), a discoverer of minor planets himself and researcher at Yale University. The naming also honors his work for the Spacewatch program.[2] The official naming citation was published by the Minor Planet Center on 1 September 1993 (M.P.C. 22505).[9]

## Notes

1. ↑ 1.0 1.1 1.2 Pravec (2013): lightcurve plot of (5040) Rabinowitz with a rotation period 4.6901±0.0004 hours with a brightness amplitude of 0.33 mag and an abs. magnitude of 12.73. Summary figures at Collaborative Asteroid Lightcurve Link (CALL) and Pravec, P.; Wolf, M.; Sarounova, L. (2013)

## References

1. ↑ 1.0 1.1 1.2 1.3 "JPL Small-Body Database Browser: 5040 Rabinowitz (1972 RF)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2005040.
2. ↑ 2.0 2.1 Schmadel, Lutz D. (2007). "(5040) Rabinowitz". Dictionary of Minor Planet Names – (5040) Rabinowitz. Springer Berlin Heidelberg. p. 434. doi:10.1007/978-3-540-29925-7_4907. ISBN 978-3-540-00238-3.
3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 "LCDB Data for (5040) Rabinowitz". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=5040|Rabinowitz.
4. ↑ 4.0 4.1 "Asteroid 5040 Rabinowitz – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=5040+Rabinowitz#Asteroid 5040 RabinowitzEAR-A-VARGBDET-5-NESVORNYFAM-V3.0.
5. ↑ 5.0 5.1 Clark, Maurice (April 2014). "Asteroid Photometry from the Preston Gott Observatory". The Minor Planet Bulletin 41 (2): 100–101. ISSN 1052-8091. Bibcode: 2014MPBu...41..100C. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014MPBu...41..100C. Retrieved 1 July 2016.
6. ↑ 6.0 6.1 Stephens, Robert D.; Coley, Daniel R. (October 2013). "A Plethora of Phocaea Asteroids". The Minor Planet Bulletin 40 (4): 203–204. ISSN 1052-8091. Bibcode: 2013MPBu...40..203S. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2013MPBu...40..203S. Retrieved 1 July 2016.
7. ↑ 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 1 July 2016.
8. ↑ 8.0 8.1 "5040 Rabinowitz (1972 RF)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=5040.
9. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html.

## 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 (5001)-(10000) – Minor Planet Center
* 5040 Rabinowitz at AstDyS-2, Asteroids—Dynamic Site
* Ephemeris * Observation prediction * Orbital info * Proper elements * Observational info
* 5040 Rabinowitz at the JPL Small-Body Database
* Close approach * Discovery * Ephemeris * Orbit diagram * Orbital elements * Physical parameters

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