Rotational period determination of 2717 Tellervo and 9773 1993 mg1

Tellervo

Maurizio Scardella, Angelo Tomassini, Francesco Franceschini
ATA (Associazione Tuscolana di Astronomia)
“F. Fuligni” Observatory    (MPC code D06)
Via Lazio, 14 – Rocca di Papa (RM) – 00040– ITALY

The main-belt asteroids (2717)Tellervo and (9773) 1993 MG1 were observed over several nights throughout 2015May-August in order to determine their synodic rotational period.

The observations of the analysed asteroids were carried out from F. Fuligni Observatoryusing a 0.35-m f/10 ACF telescope and SBIG ST8-XE CCD camera with Bessel R filter and from Franceschini’s equipment using a 9.25″ f/6.3 reflector telescope equipped with Atik 314L- CCD camera with Astrodon R filter.  All images were dark and flat-field calibrated with Maxim DL. Differential photometry and period analysis was done using MPO Canopus (Warner, 2012).

(2717) Tellervo

The lightcurve of the main-belt asteroid (2717)Tellervo was already carried out from our team during the summer 2012 (see MPB 40-2) but because scattered data acquired, his rotational period resulted quite different with respect to the value calculated in this session. Current version photos were taken during May-June 2015 over five nights. Theresulting lightcurve has synodic period P = 4.213 ± 0.001 hoursand amplitude 0.40 mag (Fig. 1).

(9773) 1993 MG1

Discovered in June 1993 by E. F. Helin at Mount Palomar Observatory, this main-belt asteroid were selected from the “Lightcurve Photometry Opportunities: July-Sept 2015” on MPB 42-3 (Warner, 2015). The observations were carried out from “F. Fuligni” Observatory and from Francesco Franceschini during four nights in July 2015.The derived synodic period was P = 2.67 ± 0.01 h with an amplitude of A = 0.24 mag (Fig. 2).

 

Tellervo

Figure 1.The lightcurve of (2717)Tellervo with a period P = 4.213 ± 0.001 h with an amplitude A = 0.40 mag.

 

of (9773) 1993 MG1

Figure 2. The lightcurve of (9773) 1993 MG1with a period P = 2.67 ± 0.01 h with an amplitude A = 0.24 mag.

 

 References

Warner, B.D. (2012). The MPO Software, Canopus version 10.4.1.9. Bdw Publishing, http://minorplanetobserver.com/

Warner, B.D. (2012). The MPO User Guide: A Companion Guide To The MPO Canopus/PhotoRed Reference Manual. BDW Publishing, Colorado Spring, CO.

Warner, B.D. (2013). “Lightcurve of 2717 Tellervo”.Pag. 108. MPC 40-2.

Warner, B.D. (2015) “Lightcurve Photometry Opportunities: July-Sept 2015”. MPC 42-3.

http://www.MinorPlanet.info/PHP/call_OppLCDBQuery.php

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