[vsnet-ecl 2909] BC Eri

[K.Nagai]

Dear All, This is Nagai.

Light Element of BC Eri is as follows.

min=2451501.10674970+0.5272429xE (IBVS4937)

I calculated O-C.

 HJD           cycle     O-C  color  obs.          Inst.
-----------------------------------------------------------
2428869.6600 -42924.0  -0.0725  pg   none          GCVS 1985
2447176.3950  -8202.5  -0.0019  vis  Paschke Anton 
2448500.0298  -5692.0  -0.0104  V    Hipparcos     
2451138.1001   -688.5  +0.0001  V    Nga           10L+ST-5
2451176.0617   -616.5  +0.0002  V    Nga           10L+ST-5
2451427.2870   -140.0  -0.0057  ccd  Paschke Anton CCD
2451477.1157    -45.5  -0.0015  V    Kis           25SC+AP-7
2451493.1972    -15.0  -0.0009  Ic   Kis           25SC+AP-7
2451501.1073      0.0  +0.0006  V    Kis           25SC+AP-7
2451502.1599      2.0  -0.0013  Ic   Kis           25SC+AP-7
2451515.0810     26.5  +0.0023  V    Kis           25SC+AP-7
2451525.0978     45.5  +0.0015  Ic   Kis           25SC+AP-7
2451526.1481     47.5  -0.0027  V    Kis           25SC+AP-7
2451528.0020     51.0  +0.0059  V    Nga           10L+ST-5
2451529.0519     53.0  +0.0013  Ic   Kis           25SC+AP-7
2451538.0143     70.0  +0.0005  V    Nga           10L+ST-5
2451548.0301     89.0  -0.0013  V    Kis           25SC+AP-7
2451877.0216    713.0  -0.0093  Rc   Nga           10L+CV-04
2451883.0913    724.5  -0.0029  V    Kis           25SC+AP-7
2452143.8230   1219.0  +0.0072  V    Paschke Anton CCD
2452185.2119   1297.5  +0.0075  Ic   Kis           25SC+AP-7
2452209.1996   1343.0  +0.0056  Rc   Nga           10L+CV-04
2452241.0995   1403.5  +0.0073  Rc   Nga           10L+CV-04
2452271.9410   1462.0  +0.0051  Rc   Nga           10L+CV-04
2452607.0163   2097.5  +0.0176  Rc   Nga           10L+CV-04
2452644.9721   2169.5  +0.0119  Rc   Nga           10L+CV-04
2452997.9617   2839.0  +0.0124  Rc   Nga           10L+CV-04
2453301.1327   3414.0  +0.0187  Rc   Nga           10L+CV-04
2453326.1738   3461.5  +0.0158  Rc   Nga           10L+CV-04
2453715.0232   4199.0  +0.0235  V    Nga           20SC+SV-04LE
2453735.0598   4237.0  +0.0249  Ic   Kis           25SC+E47+
2454416.2663   5529.0  +0.0336  Ic   Njh           20SC+CV-04

Observer code:
Kis : Seiichiro Kiyota (Tsukuba, JAPAN)
Njh : Kazuhiro Nakajima (Mie, JAPAN)
Nga : Kazuo Nagai (Kanagawa, JAPAN)

O-C has the tendency of the plus.

d(O-C)=0.0000058xE-0.0011367 (from E=0 to E=5529)

new min=2451501.105613+0.5272487xE


Kazuo Nagai / PXS10547 at nifty.ne.jp ( http://homepage3.nifty.com/nga_star/ )