Oct 11th 2013 with a half full moon in Sagittarius/Capricon, magnitude 6 stars are still visible to the naked eye under dark skies. Outside city lights with a half full moon, without any binoculars or scope, I can make out the circlet of Pisces and see delta Pisces and see the planet Uranus (magnitude 5.7) and the star HIP2954 (Magnitude 6.5) next to it. Also with the half full moon near Sagittarius, M7 was visible in binoculars.
There is an easy way to find Uranus:
Locate Algenib in the square of Pegasus.
To it's immediate lower right is 38 Pisces. Follow down lower left 2 more stars and you find 35 Pisces.
35 Pisces is in a diamond structure with 3 other like-magnitude stars.
At the extreme left of this diamond structure is 41 Pisces.
Rotate your finderscope a little down and left and you will find 51 Pisces.
Uranus and 51Pisces are almost at the same R.A 0h 34m.. so turn your declination down about 4 deg (Pisces 51 is at DEC 7deg RA 0h 32m and Uranus currently at 3deg RA 0h 35m)
Another way: rotate your finderscope a tad left you will see Delta Pisces with 2 stars (Pisces 62, Pisces 60) in a straight line pointing to Uranus. On the way down to the left is 96 Pisces. Uranus is 4 degrees to the lower right of 96 Pisceum.
I found that in light polluted skies, the blue is washed out.
Thursday, October 31, 2013
The wrath of Poseidon: Star hopping to find Neptune in Oct 2013
Neptune is 7.8 magnitude and probably better to look for it under dark skies.
These days (Oct 2013) Neptune is in Aquarius and the planet is not far from a whole story (classical mythology) forever written into the skies around his (assuming Poseidon and Neptune are the same God) wrath with the Queen Cassiopeia. Just above and to the left the constellation of Aquarius one can find the asterism - the big square of Pegasus. Connected to this asterism at Alpheratz is the chained princess Andromeda. Above her towards Polaris, is her mother Queen Cassiopeia and next to Cassiopeia is the King-Cepheus. Rising in the eastern horizon is the hero Perseus, future husband of Andromeda. Story goes Cassiopeia angered Poseidon by praising and comparing her daughter to the Nereids . Anyhow the story also has a happy ending when Perseus marries Andromeda.
Actually the big 'W' traditionally associated with Cassiopeia reminds me more of the Golden State Warriors than anything else.
To find Neptune, start from Sadachbia in the Aquarius Waterjug down thru 51 Aquarius and 44 Aquarius. 51 Aquarius is about 3.5 deg below from Sadachbia. If you have an equatorial, just slowly turn on the declination slow-motion handle. 44 Aquarius is to the lower right of 51 Aquarius. Hardly within 2.5 degrees below 44 Aquarius is Aancha (mag 4.3). From Aancha then hop down a little over a degree to HIP110009 (magnitude 5.4),
HIP110009 forms a triangle with Sigma Aquarius (lower left of HIP110009) and 38 Aquarius (lower right of HIP110009). All 3 stars are within 6 degrees and should be viewable together in a 6x30 finder-scope. If you a draw line from sigma Aquarius to 38 Aquarius, Neptune is in the center. Below Neptune are 3 dim stars towards 38 Aquarius.
Another option is from Deneb Algiedi in Capricon. To the left is the magnitude 4.2 star Iota Aquarii. Further to the left of Iota Aquarii are two magnitude 4 stars: 42 Aquarii (magnitude 5.4) and 38 Aquarii (magnitude 5.3). Between 42 and 38 Aquarii are 3 dim stars. The fist is magnitude 6.9, then 7.2 and finally 7.9 (HIP110169 about 670 ly away) . Neptune is the 3rd star to the right above HIP110169. Hop down these 3 stars and to the upper left you should find Neptune.
Stars near Celestial Equator
Stars near Celestial Equator:
Altair, Heze and Porrima (Virgo), Regulus (Leo), Mintaka (Orion), Alrescha and Pisces circlet (Pisces),
Eta and Zeta Aquarius (Aquarian waterjug), Sadal Melik (Aquarius)
Constellations along Celestial Equator
Virgo, Serpens, Caput, Ophiucus, Aquila, Aquarius, Pisces, Leo, Hydra, Canis Minor, Monoceros
Altair, Heze and Porrima (Virgo), Regulus (Leo), Mintaka (Orion), Alrescha and Pisces circlet (Pisces),
Eta and Zeta Aquarius (Aquarian waterjug), Sadal Melik (Aquarius)
Constellations along Celestial Equator
Virgo, Serpens, Caput, Ophiucus, Aquila, Aquarius, Pisces, Leo, Hydra, Canis Minor, Monoceros
HOUR | RA | DEC | STARS | CONSTELLATIONS |
Delta Pisces is very close to Vernal Equinox (0h and 0deg) | ||||
0h | Caph, Schedar, Alpheratz | Cassiopeia, Pegasus | ||
0h | 0h 9m | 69º | Caph | Cassiopeia |
0h | 0h 40m | 56º | Schedar | Cassiopeia |
0h | 0h 8m | 29º | Alpheratz | Pegasus |
1h | Mirach, Tau Pisceum | Andromeda, Pisces | ||
1h | 1h 9m | 35º | Mirach | Andromeda |
1h | 1h 12m | 36º | Tau Pisceum | Pisces |
2h | Hamal, Alrescha | Aries, Pisces | ||
2h | 2h 7m | 23º | Hamal | Aries |
2h | 2h 2m | 2.5º | Alrescha | Pisces |
3h | Pleiades, Mirfak, Lambda Tauri, Atik | Taurus, Perseus, Taurus, Perseus | ||
3h | 3h 47m | 24º | Pleiades | Star Cluster |
3h 3h | 3h 24m 3h 54m | 50º 32 | Mirfak Atik | Perseus Perseus |
4h | 4h | Lambda Tauri, Aldeberan | Taurus | |
4h | 4h 1m | 12º | Lambda Tauri | Taurus |
4h | 4h 36m | 16º | Aldeberan | Taurus |
5h | Capella, Menkalinan, Elnath | Auriga, Taurus | ||
5h | 5h 17m | 46º | Capella | Auriga |
5h | 5h 26m | 28 | Elnath | Taurus |
5h | 5h 60m | 45º | Menkalinan | Auriga |
7h | 7h 35m | 32º | Castor | Gemini |
7h | 7h 45m | 28º | Pollux | Gemini |
8h | Altarf | Cancer | ||
8h | 8h 16m | 9º | Altarf | Cancer |
9h | M81, M82 | UMa | ||
9h | 9h 56m | 69º 4.1 | M82 (Cigar galaxy) | UMa |
9h | 9h 55.6m | 69º 4.5 | M81 (Bode's galaxy) | UMa |
10h | 10h 8m | 12º | Regulus | Leo |
11h | Dubhe, Phecda | UMa | ||
11h | 11h | 62º | Dubhe | UMa |
11h | 11h 53m | 53º | Phecda | UMa |
12h | Megrez | UMa | ||
12h | 12h 15m | 57º | Megrez | UMa |
13h | Alioth | UMa | ||
13h | 12h53m | DEC | Alioth | UMa |
14h | M101 | UMa | ||
14h | 14h | º | M101 | UMa |
15h | Pherkad | UMi | ||
15h | 15h | º | Pherkad | UMi |
18h | Vega | Lyra | ||
18h | 18h36m | 39º | Vega | Lyra |
19h | Altair | Aquila | ||
19h | 19h 51m | 8º 52 | Altair | Aquila |
20h | Deneb (20h41') , Sadr | Cygnus | ||
20h | 20h | º | Deneb (20h41') , Sadr | Cygnus |
21h | Alderamin, Deneb | Cepheus, Cygnus | ||
21h | 21h | º | Alderamin, Deneb | Cepheus, Cygnus |
22h | Sadal Melik | Cepheus | ||
22h | 22h | º | Sadal Melik | Cepheus |
23h | Markab,Scheat, Gamma Pisceum | Pegasus,Pisces | ||
23h | 23h | º | Markab | Pegasus,Pisces |
23h | 23h | º | Scheat | Pegasus,Pisces |
23h | 23h | º | Gamma Pisceum | Pegasus,Pisces |
Wednesday, October 30, 2013
10x50 binocs and magnitude 5 stars in light polluted skies.
My 10x50 Nikon binoculars (variable) gives about 4 degrees FOV. The finderscope gives about 6degs. But seeing stars/DSO with greater than magnitude 8 with binoculars in these light-polluted skies (hardly any moonlight) was near impossible. My binoculars had no problem with stars around magnitude 5 (UMa 38) in city lights.
With the naked eye, stars with magnitude 3 are barely visible with the naked eye - I had a difficult time seeing the Aquarian waterjug or Piscean circlet without binoculars
With the naked eye, stars with magnitude 3 are barely visible with the naked eye - I had a difficult time seeing the Aquarian waterjug or Piscean circlet without binoculars
Sunday, October 27, 2013
Vernal Equinox in Pisces
Pisces is a great constellation for anyone wishing to see 0h RA line and the 0deg celestial equator.
The Pisces circlet is just barely over 6.5deg across so you may not be able to get the whole circlet in your finderscope.
Kappa pisceum in the circlet is barely a degree above the equator and if you can find Omega pisceum (a 2deg hop from iota Pisceum) then you are extremely close to 0h
Anyone wishing to see the Celestial Equator (0degrees) and RA (0h) intersection can clearly see it in the skies these nights (October)
Locate the waterjug of Aquarius. The Celestial Equator goes right through Eta Aquarii and Zeta1 Aquarii. Follow the line down below the circlet of Pisces and just between Omega Pisces and Delta2 Pisces, is the 0th hour (RA=0).
Also this a great way to locate the Planet Uranus which is in Pisces these days (Oct 2013).
The Pisces circlet is just barely over 6.5deg across so you may not be able to get the whole circlet in your finderscope.
Kappa pisceum in the circlet is barely a degree above the equator and if you can find Omega pisceum (a 2deg hop from iota Pisceum) then you are extremely close to 0h
Anyone wishing to see the Celestial Equator (0degrees) and RA (0h) intersection can clearly see it in the skies these nights (October)
Locate the waterjug of Aquarius. The Celestial Equator goes right through Eta Aquarii and Zeta1 Aquarii. Follow the line down below the circlet of Pisces and just between Omega Pisces and Delta2 Pisces, is the 0th hour (RA=0).
Also this a great way to locate the Planet Uranus which is in Pisces these days (Oct 2013).
Finderscope magnitude
Without use of any lens, Uranus at 5.7 and its current companion at magnitude 6.7 are easily visible in dark skies (Milky Way skies).
The 6x30 right finder cannot see the Ring Nebula at magnitude 9.5. I found the 6x30 can just see HIP110169 a small magnitude 7.9 star directly below Neptune in Aquarius. The star itself is 607 ly away. So I put the upper limit of the finder at 8. But (happiness expressed here) the 127mm Mak-Cassegrain can see up to 10.5 (my last test with the Mak was with M57 at magnitude 9.5) since it easily resolved TYC5810-701-1 at magnitude 10.56 -- one of 2 tiny stars to the left of Neptune and above HIP110169.
The 6x30 right finder cannot see the Ring Nebula at magnitude 9.5. I found the 6x30 can just see HIP110169 a small magnitude 7.9 star directly below Neptune in Aquarius. The star itself is 607 ly away. So I put the upper limit of the finder at 8. But (happiness expressed here) the 127mm Mak-Cassegrain can see up to 10.5 (my last test with the Mak was with M57 at magnitude 9.5) since it easily resolved TYC5810-701-1 at magnitude 10.56 -- one of 2 tiny stars to the left of Neptune and above HIP110169.
I'm going to see if I can see the 3 very faint magnitude 10 stars TYC6861-1787-1, TYC6861-2115-1 and TYC6848-2970-1 from Kaus Borealis to M28 (magnitude 10.5) with either my finder scope and the Mak Cassegrain.
TYC6861-2412-1 is exactly 10.0 and directly above Kaus Borealis and should be a good test for testing magnitude capability of both finder scope and Mak.
TYC6861-2412-1 is exactly 10.0 and directly above Kaus Borealis and should be a good test for testing magnitude capability of both finder scope and Mak.
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