Re: M 32 (NGC 221)
I spent most of today trying to find out if I could identify my possible asteroid in M32. Using the Lowell Observatory Asteroid Plot (ASTPLOT) I have 2 possibilities, the favourite being [i](76865) 2000 XW38[/i].
Here's the plot generated by my search (centred on coordinates obtained from StarryNight 6 using my image)
Lowell Observatory 2008
Name RA Decl R mag Daily Motion Eph. Uncert.
RA Decl RA Decl
(76865) 2000 XW38 00 44 24.261 40 56 37.32 17.2 -85.6 -6.20 1.25E-02 5.44E-02
2003 WT24 00 43 50.227 40 10 46.96 19.1 -72.1 -12.19 5.99E+01 1.83E+02
2005 MP32 00 39 59.407 40 30 32.64 19.2 -93.5 -4.24 -NaN -NaN
Interestingly, setting the time forward 24 hours and zooming in on the coordinates I obtained from my image I got an interesting result
Lowell Observatory 2008
and zooming in further
Lowell Observatory 2008
So, it would seem to have arrived a day early, and is slightly off course. I guess it's orbital properties need updating, but I doubt it. The approx. angular separation between the data and my observed result is 0 18' 55" at a position angle of 257.2 on Oct 16 2008 00:27:43 UTC
Here's some data:
[b](76865) 2000 XW38[/b]
[table][tr][td]Preliminary indications[/td][td]2000 XW38[/td][/tr][tr][td]Catalog No.[/td][td]76865[/td][/tr][tr][td]Title [/td][td]2000 XW38[/td][/tr][tr][td][b][u]Discovered[/u][/b][/td][td][/td][/tr][tr][td]When[/td][td]February 5 2000[/td][/tr][tr][td]Where
[/td][td]Socorro[/td][/tr][tr][td]Who
[/td][td]LINEAR[/td][/tr][tr][td][b][u]Elements of the runway (Epoch J2000, 0)[/u][/b]
[/td][td][/td][/tr][tr][td]Epoch
[/td][td]30th 2008 0:00:00 UTC[/td][/tr][tr][td]Great half[/td][td]1.9550 AU - 292 458 063 km[/td][/tr][tr][td]Eccentricity[/td][td]0.0584[/td][/tr][tr][td]Median daily movement
[/td][td]0.3606 / day[/td][/tr][tr][td]The slope of the runway to ecliptic
[/td][td]17.4049
[/td][/tr][tr][td]The length of ascending node
[/td][td]300.5276
[/td][/tr][tr][td]The argument width perihelion
[/td][td]321.4437 [/td][/tr][tr][td]Central anomaly
[/td][td]134.1315 [/td][/tr][tr][td][b][u]Other data[/u][/b]
[/td][td][/td][/tr][tr][td]Magnitude
[/td][td]14.70 mag[/td][/tr][tr][td]Number of observations[/td][td]91[/td][/tr][tr][td]The number of opposition[/td][td] 4[/td][/tr][tr][td]Observed in the years[/td][td]1994-2004[/td][/tr][tr][td]Last observation
[/td][td]30th January 2004[/td][/tr][tr][td]Type asteroids
[/td][td]in the main asteroid belt[/td][/tr]
[/table]
Source Planety slune[ch269]n soustavy
Perturbed ephemeris below is based on 4-opp elements from MPO 55062. Last observed on 2007 Apr. 23
Date UT R.A. (J2000) Decl. Delta r El. Ph. V Sky Motion Uncertainty info
h m s "/min P.A. 3-sig/" P.A.
2008 10 14 000000 00 47 09.4 +41 08 04 1.104 2.012 146.4 15.9 17.3 0.69 251.6 1 058.8
2008 10 15 000000 00 45 46.4 +41 02 34 1.104 2.013 146.6 15.8 17.3 0.69 249.8 1 058.6
2008 10 16 000000 00 44 24.2 +40 56 35 1.104 2.013 146.7 15.8 17.3 0.69 248.0 1 058.3
2008 10 17 000000 00 43 03.0 +40 50 08 1.104 2.014 146.9 15.7 17.3 0.69 246.3 1 058.0
2008 10 18 000000 00 41 43.0 +40 43 12 1.105 2.015 147.0 15.6 17.3 0.69 244.5 1 057.8
2008 10 19 000000 00 40 24.2 +40 35 48 1.105 2.015 147.0 15.6 17.3 0.69 242.8 1 057.5
2008 10 20 000000 00 39 06.8 +40 27 58 1.106 2.016 147.0 15.6 17.3 0.69 241.1 1 057.3
2008 10 21 000000 00 37 50.9 +40 19 42 1.107 2.016 147.0 15.6 17.3 0.69 239.3 1 057.1
2008 10 22 000000 00 36 36.6 +40 11 00 1.108 2.017 147.0 15.6 17.3 0.69 237.6 1 056.8
2008 10 23 000000 00 35 24.1 +40 01 55 1.110 2.017 146.9 15.6 17.3 0.69 235.9 1 056.6
2008 10 24 000000 00 34 13.4 +39 52 26 1.111 2.018 146.7 15.7 17.3 0.69 234.1 1 056.4
2008 10 25 000000 00 33 04.7 +39 42 35 1.113 2.019 146.6 15.8 17.3 0.68 232.4 1 056.2
2008 10 26 000000 00 31 58.0 +39 32 23 1.115 2.019 146.3 15.8 17.3 0.68 230.7 1 056.0
2008 10 27 000000 00 30 53.5 +39 21 51 1.117 2.020 146.1 15.9 17.3 0.68 228.9 1 055.8
2008 10 28 000000 00 29 51.2 +39 11 00 1.120 2.020 145.8 16.0 17.3 0.67 227.1 1 055.6
2008 10 29 000000 00 28 51.3 +38 59 52 1.122 2.021 145.5 16.2 17.4 0.67 225.3 1 055.4
2008 10 30 000000 00 27 53.8 +38 48 27 1.125 2.022 145.1 16.3 17.4 0.66 223.5 1 055.2
2008 10 31 000000 00 26 58.7 +38 36 46 1.128 2.022 144.8 16.5 17.4 0.66 221.7 1 055.1
2008 11 01 000000 00 26 06.2 +38 24 52 1.132 2.023 144.4 16.6 17.4 0.65 219.9 1 054.9
2008 11 02 000000 00 25 16.2 +38 12 45 1.135 2.023 143.9 16.8 17.4 0.65 218.0 1 054.8
2008 11 03 000000 00 24 28.9 +38 00 26 1.139 2.024 143.5 17.0 17.4 0.64 216.1 1 054.7
2008 11 04 000000 00 23 44.3 +37 47 57 1.143 2.024 143.0 17.2 17.4 0.63 214.2 1 054.6
2008 11 05 000000 00 23 02.4 +37 35 18 1.147 2.025 142.4 17.4 17.4 0.63 212.3 1 054.4
2008 11 06 000000 00 22 23.2 +37 22 31 1.151 2.025 141.9 17.6 17.5 0.62 210.3 1 054.4
2008 11 07 000000 00 21 46.8 +37 09 38 1.155 2.026 141.3 17.8 17.5 0.61 208.3 1 054.3
Ed: This story continues here - [b]Asteroid (76865) 2000 XW38[/b]
Here's the plot generated by my search (centred on coordinates obtained from StarryNight 6 using my image)
Lowell Observatory 2008
Name RA Decl R mag Daily Motion Eph. Uncert.
RA Decl RA Decl
(76865) 2000 XW38 00 44 24.261 40 56 37.32 17.2 -85.6 -6.20 1.25E-02 5.44E-02
2003 WT24 00 43 50.227 40 10 46.96 19.1 -72.1 -12.19 5.99E+01 1.83E+02
2005 MP32 00 39 59.407 40 30 32.64 19.2 -93.5 -4.24 -NaN -NaN
Interestingly, setting the time forward 24 hours and zooming in on the coordinates I obtained from my image I got an interesting result
Lowell Observatory 2008
and zooming in further
Lowell Observatory 2008
So, it would seem to have arrived a day early, and is slightly off course. I guess it's orbital properties need updating, but I doubt it. The approx. angular separation between the data and my observed result is 0 18' 55" at a position angle of 257.2 on Oct 16 2008 00:27:43 UTC
Here's some data:
[b](76865) 2000 XW38[/b]
[table][tr][td]Preliminary indications[/td][td]2000 XW38[/td][/tr][tr][td]Catalog No.[/td][td]76865[/td][/tr][tr][td]Title [/td][td]2000 XW38[/td][/tr][tr][td][b][u]Discovered[/u][/b][/td][td][/td][/tr][tr][td]When[/td][td]February 5 2000[/td][/tr][tr][td]Where
[/td][td]Socorro[/td][/tr][tr][td]Who
[/td][td]LINEAR[/td][/tr][tr][td][b][u]Elements of the runway (Epoch J2000, 0)[/u][/b]
[/td][td][/td][/tr][tr][td]Epoch
[/td][td]30th 2008 0:00:00 UTC[/td][/tr][tr][td]Great half[/td][td]1.9550 AU - 292 458 063 km[/td][/tr][tr][td]Eccentricity[/td][td]0.0584[/td][/tr][tr][td]Median daily movement
[/td][td]0.3606 / day[/td][/tr][tr][td]The slope of the runway to ecliptic
[/td][td]17.4049
[/td][/tr][tr][td]The length of ascending node
[/td][td]300.5276
[/td][/tr][tr][td]The argument width perihelion
[/td][td]321.4437 [/td][/tr][tr][td]Central anomaly
[/td][td]134.1315 [/td][/tr][tr][td][b][u]Other data[/u][/b]
[/td][td][/td][/tr][tr][td]Magnitude
[/td][td]14.70 mag[/td][/tr][tr][td]Number of observations[/td][td]91[/td][/tr][tr][td]The number of opposition[/td][td] 4[/td][/tr][tr][td]Observed in the years[/td][td]1994-2004[/td][/tr][tr][td]Last observation
[/td][td]30th January 2004[/td][/tr][tr][td]Type asteroids
[/td][td]in the main asteroid belt[/td][/tr]
[/table]
Source Planety slune[ch269]n soustavy
Perturbed ephemeris below is based on 4-opp elements from MPO 55062. Last observed on 2007 Apr. 23
Date UT R.A. (J2000) Decl. Delta r El. Ph. V Sky Motion Uncertainty info
h m s "/min P.A. 3-sig/" P.A.
2008 10 14 000000 00 47 09.4 +41 08 04 1.104 2.012 146.4 15.9 17.3 0.69 251.6 1 058.8
2008 10 15 000000 00 45 46.4 +41 02 34 1.104 2.013 146.6 15.8 17.3 0.69 249.8 1 058.6
2008 10 16 000000 00 44 24.2 +40 56 35 1.104 2.013 146.7 15.8 17.3 0.69 248.0 1 058.3
2008 10 17 000000 00 43 03.0 +40 50 08 1.104 2.014 146.9 15.7 17.3 0.69 246.3 1 058.0
2008 10 18 000000 00 41 43.0 +40 43 12 1.105 2.015 147.0 15.6 17.3 0.69 244.5 1 057.8
2008 10 19 000000 00 40 24.2 +40 35 48 1.105 2.015 147.0 15.6 17.3 0.69 242.8 1 057.5
2008 10 20 000000 00 39 06.8 +40 27 58 1.106 2.016 147.0 15.6 17.3 0.69 241.1 1 057.3
2008 10 21 000000 00 37 50.9 +40 19 42 1.107 2.016 147.0 15.6 17.3 0.69 239.3 1 057.1
2008 10 22 000000 00 36 36.6 +40 11 00 1.108 2.017 147.0 15.6 17.3 0.69 237.6 1 056.8
2008 10 23 000000 00 35 24.1 +40 01 55 1.110 2.017 146.9 15.6 17.3 0.69 235.9 1 056.6
2008 10 24 000000 00 34 13.4 +39 52 26 1.111 2.018 146.7 15.7 17.3 0.69 234.1 1 056.4
2008 10 25 000000 00 33 04.7 +39 42 35 1.113 2.019 146.6 15.8 17.3 0.68 232.4 1 056.2
2008 10 26 000000 00 31 58.0 +39 32 23 1.115 2.019 146.3 15.8 17.3 0.68 230.7 1 056.0
2008 10 27 000000 00 30 53.5 +39 21 51 1.117 2.020 146.1 15.9 17.3 0.68 228.9 1 055.8
2008 10 28 000000 00 29 51.2 +39 11 00 1.120 2.020 145.8 16.0 17.3 0.67 227.1 1 055.6
2008 10 29 000000 00 28 51.3 +38 59 52 1.122 2.021 145.5 16.2 17.4 0.67 225.3 1 055.4
2008 10 30 000000 00 27 53.8 +38 48 27 1.125 2.022 145.1 16.3 17.4 0.66 223.5 1 055.2
2008 10 31 000000 00 26 58.7 +38 36 46 1.128 2.022 144.8 16.5 17.4 0.66 221.7 1 055.1
2008 11 01 000000 00 26 06.2 +38 24 52 1.132 2.023 144.4 16.6 17.4 0.65 219.9 1 054.9
2008 11 02 000000 00 25 16.2 +38 12 45 1.135 2.023 143.9 16.8 17.4 0.65 218.0 1 054.8
2008 11 03 000000 00 24 28.9 +38 00 26 1.139 2.024 143.5 17.0 17.4 0.64 216.1 1 054.7
2008 11 04 000000 00 23 44.3 +37 47 57 1.143 2.024 143.0 17.2 17.4 0.63 214.2 1 054.6
2008 11 05 000000 00 23 02.4 +37 35 18 1.147 2.025 142.4 17.4 17.4 0.63 212.3 1 054.4
2008 11 06 000000 00 22 23.2 +37 22 31 1.151 2.025 141.9 17.6 17.5 0.62 210.3 1 054.4
2008 11 07 000000 00 21 46.8 +37 09 38 1.155 2.026 141.3 17.8 17.5 0.61 208.3 1 054.3
Ed: This story continues here - [b]Asteroid (76865) 2000 XW38[/b]