2021-09-29, 03:50 PM
Hi BMD,
Yes the new GUI at HORIZONS is an improvement. Regarding the Data Table not fitting on your monitor, have you tried to use the
Ctrl-'-' key combo on the Number pad to reduce the screen magnification? To restore to 100% Zoom use Ctrl-0. To be clear, hold the Ctrl key & press the '-' key on the number pad simultaneously. That reduces the Zoom level, while Ctrl-'+' increases it.
Regarding the estimated apparent magnitude of the MPs, ST4 calculates that in the ephemeris, but I'm not sure that it includes atmospheric extinction in the Mag calculation. However, I think that extinction is included in the 'Quality' calculation because I've seen 'Quality' drop from 'Fair' to 'Poor' through a night as the object approaches the horizon.
The elements that I used to calculate the ephemeris for 2021 RG19 were from 2021 Sep 27 according to the OI.
The OL for close MPs for October 1 is attached.
Hope this is useful,
Phil S.
Yes the new GUI at HORIZONS is an improvement. Regarding the Data Table not fitting on your monitor, have you tried to use the
Ctrl-'-' key combo on the Number pad to reduce the screen magnification? To restore to 100% Zoom use Ctrl-0. To be clear, hold the Ctrl key & press the '-' key on the number pad simultaneously. That reduces the Zoom level, while Ctrl-'+' increases it.
Regarding the estimated apparent magnitude of the MPs, ST4 calculates that in the ephemeris, but I'm not sure that it includes atmospheric extinction in the Mag calculation. However, I think that extinction is included in the 'Quality' calculation because I've seen 'Quality' drop from 'Fair' to 'Poor' through a night as the object approaches the horizon.
The elements that I used to calculate the ephemeris for 2021 RG19 were from 2021 Sep 27 according to the OI.
The OL for close MPs for October 1 is attached.
Hope this is useful,
Phil S.