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NGC 7771,7771A,7770,7769 (Pegasus) * August-September 2017 * ASA N12 astrograph (f/3.6, 1075mm) * ASA DDM85 mount * G3-16200 EC Moravian CCD* LRGB Baader filters * Subframes acquired unguided: Auotslew+ Sequence programms * L: 720 min R: 480min G::420 min B:540 min *
( Thanks to Mr. Sakib Rasool for the image suggestion).
The galactic group of NGC 7771 is about 200 million light-years away in the constellation of Pegasus: NGC 7771 is the large, pebble spiral galaxy of 75,000 light-years in diameter that appears in the center of the image, which is accompanied by two small galaxies beneath it... a lenticular (NGC 7770) and a very small one in it´s border (NGC 7771A). The spiral galaxy is NGC 7769, front view. Galaxies in the NGC 7771 group interact with each other and, within a cosmological scale, are predicted to end up fused into an even larger galaxy. The history of these interactions can be described by following the faint currents of stars plucked from galaxies, distorted by the effect of the gravitational tide caused by the above-mentioned close encounters. NGC 7771 has a huge "tails" implying that the galaxies have already passed very close to each other.
It is not easy to get a clear picture of this galactic group, as more detailed images also reveal the presence of dust clouds in the foreground. These faint dust nebulae, located a few hundred light-years away from us and slightly above the galactic plane, reflect the light of the stars in our own galaxy, the Milky Way.
(Image information credits: APOD, Wikipedia, Michael Ryskamp )
BLOODHOUND build: Work continues on the test assembly of the front subframe - to which the front wheels will be attached.
The bottom part of the bushing touches the support plate; it shouldn't. The rubber that holds the central rod anchored to the outer sleeve weakens and as a result, the subframe sags.
28 May 2022, ~11pm ET, Springfield Virginia USA. Orion Atlas AZ/EQ-G Pro mount. QHY 294M Pro camera @ -10C, bin 1, exposure 15 seconds, gain 2600, 11MP mode, stack of 60 subframes, no calibration frames. Baader Luminance filter. Reprocessed on 31 May 2023 in Siril and PS.
Clouds: partly cloudy
Seeing: avg
Transparency: avg
Moon phase: 3%
FOV: 32 x 30 arcmin.
Resolution: 0.9 arcsec/pixel.
Orientation: Up is West.
Appearance: Finely detailed face-on spiral galaxy.
Notes: Focused center FOV. Unguided.
From Wikipedia:
Messier 63 or M63, also known as NGC 5055 or the Sunflower Galaxy, is a spiral galaxy in the northern constellation of Canes Venatici with approximately 400 billion stars. M63 was first discovered by the French astronomer Pierre Méchain, then later verified by his colleague Charles Messier on June 14, 1779. The galaxy became listed as object 63 in the Messier Catalogue. In the mid-19th century, Anglo-Irish astronomer Lord Rosse identified spiral structures within the galaxy, making this one of the first galaxies in which such structure was identified.
The shape or morphology of this galaxy has a classification of SAbc, indicating a spiral form with no central bar feature (SA) and two moderate to loosely wound arms (bc). Each arm wraps 150° around the galaxy and extends out to 13,000 light-years (4,000 parsecs) from the nucleus.
M63 is a weakly active galaxy with a LINER nucleus – short for 'low-ionization nuclear emission-line region'. This displays as an unresolved source at the galactic nucleus that is cloaked in a diffuse emission. The latter is extended along a position angle of 110° relative to the north celestial pole, and both soft X-rays and hydrogen (H-alpha) emission can be observed coming from along nearly the same direction. The existence of a supermassive black hole (SMBH) at the nucleus is uncertain; if it does exist, then the mass is estimated as (8.5±1.9)×108 M☉, or around 850 million times the mass of the Sun.
Radio observations at the 21-cm hydrogen line show the gaseous disk of M63 extends outward to a radius of 130,000 light-years (40 kiloparsecs), well past the bright optical disk. This gas shows a symmetrical form that is warped in a pronounced manner, starting at a radius of 33,000 light-years (10 kiloparsecs). The form suggests a dark matter halo that is offset with respect to the inner region. The reason for the warp is unclear, but the position angle points toward the smaller companion galaxy, UGC 8313.
The distance to M63, based upon the luminosity-distance measurement is 29,300,000 light-years (8.99 megaparsecs). The radial velocity relative to the Local Group yields an estimate of 15,200,000 light-years (4.65 megaparsecs). Estimates based on the Tully–Fisher relation range over 16,000,000–34,000,000 light-years (5.0–10.3 megaparsecs). The tip of the red-giant branch technique gives a distance of 28,930,000 ± 950,000 light-years (8.87 ± 0.29 megaparsecs).
M63 is part of the M51 Group, a group of galaxies that also includes M51 (the 'Whirlpool Galaxy').
In 1971, a supernova with a magnitude of 11.8 appeared in one of the arms. It was discovered on May 24 and reached peak light around May 26. The spectrum of this, SN 1971 I, is consistent with a supernova of type I. However, the spectroscopic behavior appeared anomalous.
Stack of 83 subframes, each 20 seconds. Moon nearly full. Processing in DSS, then taken straight into Photoshop CS2, then changed to jpg in GIMP. What a palava.
This subframe carries a single person. An advanced AI controls the canon while the human pilot controls the walker along with the forward light laser turret.
M82 with 58 subframes of 300 seconds from T3 at iTelescope's observatory in New Mexico. Processed in PixInsight and Lightroom.
CON 771C seen on the seafront at Lowestoft, Suffolk.
Model E-Type Series I
Manufacturer: Jaguar Cars, Coventry
Designer: Malcolm Sayer
Chassis/body: Central steel monocoque with front subframe
Length: 175 in. (4,445 mm)
Wheelbase: 96 in. (2,438)
Width: 65.2 in. (1,656 mm)
Front track: 50 in. (1,270 mm)
Rear track: 50 in. (1,270 mm)
Height: 48.1 in. (1,221 mm)
Kerb weight: 2,770 lbs. (1,256 kg)
Steering: Rack and pinion
Turning circle: 37 ft. (11.27 m)
Front: Independent, unequal length A-arms, torsion bars, tube shocks
Rear: Independent, transverse tubular and trailing links, twin coil springs and telescopic dampers each side, anti-roll bar
Brake system: Hydraulic with vacuum servo, separate systems front and rear
Front break: Dunlop disc, 11 in. (279 mm) diameter
Rear: Dunlop disc, 10 in. (254 mm) diameter
Front tyres: 6.40 x 15 in. (162 x 381 mm) Dunlop R.S.5
Rear tyres: 6.40 x 15 in. (162 x 381 mm) Dunlop R.S.5
Normal tyre pressure front: 23 psi (1.585 bar)
Normal tyre pressure rear: 25 psi (1.723 bar)
Fuel capacity: 14 gal. (63.6 litres)
Engine: 4,235 cc (258.43 cu. in.) six cylinder, inline, double overhead camshafts
Engine output: 260 hp (193.88 kW) at 4,000 rpm
Fuel system: Triple HD.8 SU carburettors
Gearbox: 4 speed manual, non-synchro
Max speed: 130+ mph (209 + km/h)
0 to 60 mph (96.5 km/h): 6.9 sec
UK price at introduction: £1,550 (1,810 Euro - $1,915) + tax
The differential is attached rigidly to the subframe. Remove the bolt that goes through the differential support bushing and lower the final drive. You should also support it with something. I forgot to support it for some time which could have damaged it, but luckily nothing happened.
Normally I raise the rear and place the jackstands under the crossmember. Obviously, since you will be lowering the crossmember, the jackstands have to go somewhere else - the jacking point is right in front of the subframe support plate. The standard jackstands fit, but in a rather precarious position. Maybe this support point is meant to work with a special jackstand.
Owners of the BMW 3 Series (E46 models) have been reporting cracks and damage in the rear subframe area of their vehicles. The issue was also common on the earlier 3 Series models and unfortunately, have reoccurred with the E46 from 1999-2006. This issue specifically appears in the rear mounting points of the subframe, which can tear out from their position in the sheet metal. This occurs as the rear differential transmits the torsional load from the engine through the subframe, and then, into the chassis of the vehicle. This constant abuse leads to fatigue in the metal, causing cracks and separation from the chassis.
The parts used for this repair includes:
Active Autowerke (www.activeautowerke.com):
• E46 Subframe / Rear Chassis Reinforcement Kit
Powerflex USA (powerflexusa.com):
• BMW E46 M3 Rear Subframe Front Bushing - Street
• BMW E46 M3 Rear Subframe Rear Bushing - Street
• BMW E46 M3 Rear Diff Rear Mount - Street
• BMW E46 M3 Rear Diff Front Mount - Street
The rubber is lubed with a very thin solution of water and dish soap. It evaporates almost instantaneously. The vertical groove in the bushing must be aligned with the dimples in the sleeve of the subframe.
I thought that by lowering the trailing arm I would gain some additional space for the subframe, but in retrospect this turned out to be unnecessary. I did not do the same on the right side and the subframe dropped just fine.
Old Celestron C8 SCT (1980's era), Antares f6.4 reducer, JMI focuser, ASI533MC Pro, iOptron HAE29 mount. Thirty 120 second subframes. Calibrated with dark, flat, and bias frames. FOV 32’ x 32’.
I used for the first time a mini-pc mounted to the scope to control the mount, main camera, and auto-guider using NINA. I was able to monitor and control the equipment remotely with an iPad. It was quite nice to be able to sit indoors out of the cold with a hot cup of tea once I got everything calibrated and working right.
February 20, 2025, backyard, Tallahassee, Florida. Bortle 7 suburban sky. Seeing was good. Guiding was fair (total error was around 1 arcsec on average.) DSS, PS, StarNet.
I am a bit slow. I was perplexed that my images were coming out in black and white. That was because I did not properly debayer the images during processing. To correct that problem, I will now shoot FIT files since my stacking software is smarter than I and will debayer FIT files automatically in the proper sequence during processing.