FO Aqr time keeping [Observed: 49 sessions from 2004 to 2015]
Twelve seasons, from 2004 to 2015, of photometric monitoring of the intermediate polar FO Aqr are presented and are compared with previous observations. The ambiguities in the cycle counting can be lifted and a new O-C diagram, spanning 34 y,r is presented, along with new ephemerides.

AO Psc time keeping [Observed: 74 sessions from 2004 to 2014]
Eleven seasons, from 2004 to 2014, of photometric monitoring of the intermediate polar AO Psc are presented and are compared with previous observations. The spin up of the white dwarf is found to be slowing down. The amplitudes of the modulated and non-modulated components of the brightness are found to have undergone a major change in 2007.

KZ Hya time keeping [Observations: 25, 27 April, 18, 19 May 2004]
Three pulses are observed for this SX Phe pulsating star. They are 29 mn late from the 29 yr old GCVS ephemeris.

EX Hya [Observed: 19, 23, 24, 29 May, 6 June 2004]
Light curves for this cataclysmic star, classified as both IP and NL, are presented and compared with the ephemeris.

GRB041211: Search for an optical transient [Observation: 11 Dec 2004]
10 hours after the burst, no optical counterpart down to mag 17.8.

WX Cet outburst [Observations: 10, 11, 12, 13 Dec 2004]
On Dec 10, 2004 I discovered the UG dwarf nova WX Cet as being unusually bright. Light curves follow.

BF Eri flickering [Observations: October, November 2004]
The cataclysmic dwarf nova BF Eri is observed by differential photometry. The light curves are searched for periodicities.

2004 PT42, a speedy asteroid [Observations: 14-15 August 2004]

V2400 Oph [Observations: several sessions between July and Sept 2004]
V2400 Oph is an IP, discless cataclysmic star. It is observed (the data are not very good) to flicker and that the color is V-R=0.3+/-0.1.

EH Lib regular pulses [Observations: April-May 2004, March-April 2005]
The pulsating star EH Lib was observed and 15 pulses were measured. They are in phase with the 55-year old ephemeris of the GCVS (may be late by 2 or 3 mn only).

17 Sept 2004: TY PsA superoutburst [Observations: Sept ,Oct 2004]
TY PsA was 4 magnitudes brighter than usual in September 2004.