Asteroids around opposition

Charts show 1 month either side of opposition and are tabulated in order of opposition date. Positions are calculated from the latest osculating elements given in the Minor Planet Center's database. Star data are from the Hipparcos/Tycho databases.

Our aim is to provide charts for all minor planets that reach magnitude 12.0 or brighter at opposition (as estimated from G and H parameters*). A chart for any object at any one date & time can also be plotted from our "What's observable" applet.

The following table gives data at opposition. An asterisk after an object's name means that an ephemeris may be found in the printed Handbook.

The charts are interactive, to assist magnitude estimation. Green boxes indicate stars with a colour index similar to the Sun (0.60 < B - V < 0.72). For further explanation see the comet charts page.

NEW (2013 Dec 2) Starting with 1021 Flammario the charts have ephemeris data built in too. If the cursor is moved along the track of an asteroid, data for 0h UT on every day appear in blue. You may need to refresh your browser's cache (Ctrl-F5 in Windows) on a chart to get the latest script file.

* Magnitude estimates are based on H, G, r, Δ and phase angle. The theory behind this was explained in "The H and G magnitude system for asteroids" by Roger Dymock in the BAA Journal: J.Br.Astron.Assoc. 117,6,2007 p.342.

Link to chartOpposition
(UT)
MagDec
(°)
r
(AU)
Δ
(AU)
Phase
(°)
Speed1
(°/hr)
139 Juewa2016-May-04 16h10.99-28.062.461.465.090.0095
69 Hesperia2016-May-05 16h11.35-8.483.072.072.700.0088
99 Dike2016-May-20 05h11.72-27.952.141.133.830.0112
23 Thalia2016-May-22 21h10.43-19.182.741.730.510.0102
511 Davida2016-May-23 21h11.58-5.413.682.704.230.0080
432 Pythia2016-May-26 06h10.86-11.572.031.034.820.0115
241 Germania2016-May-26 13h11.80-24.603.102.091.120.0084
7 Iris2016-May-29 18h9.24-23.342.861.850.580.0103
516 Amherstia2016-May-31 01h10.55-46.931.981.0212.650.0079
404 Arsinoe2016-Jun-06 14h11.36-15.072.171.163.570.0116
87 Sylvia2016-Jun-10 13h11.55-24.893.372.360.550.0079
8 Flora2016-Jun-11 12h9.35-18.022.411.402.130.0112
90 Antiope2016-Jun-11 13h11.81-23.762.791.770.230.0083
335 Roberta2016-Jun-17 08h11.05-14.562.071.064.310.0092
704 Interamnia2016-Jun-18 01h10.35-29.453.142.131.950.0093
120 Lachesis2016-Jun-18 12h11.99-33.473.012.003.370.0081
224 Oceana2016-Jun-19 13h11.88-33.112.531.523.870.0092
354 Eleonora2016-Jun-26 06h10.67-3.232.961.996.760.0094
141 Lumen2016-Jun-29 09h11.98-35.872.631.634.860.0099
284 Amalia2016-Jun-29 10h11.53-10.781.840.846.810.0095
71 Niobe2016-Jul-06 15h10.52-43.672.451.488.600.0118
980 Anacostia2016-Jul-11 02h10.66-20.562.431.410.640.0112
359 Georgia2016-Jul-13 17h11.96-32.752.431.424.640.0090
44 Nysa2016-Jul-15 05h10.56-19.652.781.760.680.0100
161 Athor2016-Jul-15 18h11.48-38.652.061.078.520.0093
138 Tolosa2016-Jul-16 06h10.73-26.632.071.052.640.0092
111 Ate2016-Jul-21 16h11.70-21.212.851.840.310.0095
64 Angelina2016-Jul-25 05h11.59-19.843.012.000.070.0091
779 Nina2016-Jul-28 10h10.13-8.592.101.095.100.0115
59 Elpis2016-Jul-29 20h11.35-9.122.591.583.790.0094
20 Massalia2016-Aug-01 09h9.87-16.862.701.680.410.0101
19 Fortuna2016-Aug-10 09h9.63-12.892.281.271.190.0100
349 Dembowska2016-Aug-11 18h9.67-26.782.771.774.500.0086
85 Io2016-Aug-12 00h10.204.172.141.169.360.0089
48 Doris2016-Aug-14 01h11.36-8.253.192.182.030.0082
56 Melete2016-Aug-14 20h10.34-2.212.011.016.270.0091
24 Themis2016-Aug-16 03h11.89-14.653.532.510.280.0079
437 Rhodia2016-Aug-18 00h11.750.821.790.798.270.0082
751 Faina2016-Aug-19 07h11.82-36.332.281.3310.960.0095
2 Pallas2016-Aug-20 13h9.199.883.352.406.920.0107
433 Eros2016-Aug-22 02h11.97-1.461.730.726.380.0192
521 Brixia2016-Aug-22 14h11.50-26.492.351.366.790.0098
532 Herculina2016-Aug-23 11h10.36-26.633.152.175.210.0092
17 Thetis2016-Aug-24 02h10.40-15.082.321.311.860.0101
372 Palma2016-Aug-26 05h11.92-6.903.212.201.160.0101
110 Lydia2016-Aug-26 14h11.03-19.402.511.513.950.0090
670 Ottegebe2016-Sep-04 05h11.95-4.352.301.291.310.0094
451 Patientia2016-Sep-05 18h11.10-26.543.012.057.130.0083
185 Eunike2016-Sep-08 07h10.65-13.592.421.423.600.0129
385 Ilmatar2016-Sep-11 19h11.81-2.923.192.190.460.0093
31 Euphrosyne2016-Sep-11 20h11.60-28.183.202.267.990.0092
67 Asia2016-Sep-13 06h10.252.032.051.043.050.0102
322 Phaeo2016-Sep-19 15h11.3812.312.101.117.000.0084
984 Gretia2016-Sep-19 22h11.729.082.251.264.930.0092
92 Undina2016-Sep-22 20h10.71-13.632.871.885.140.0082
550 Senta2016-Sep-27 07h11.9518.862.141.168.640.0093
11 Parthenope2016-Sep-29 14h9.16-4.032.261.273.190.0100
487 Venetia2016-Sep-30 21h11.44-11.962.451.476.620.0093
117 Lomia2016-Oct-01 07h11.9810.352.921.922.630.0095
32 Pomona2016-Oct-05 07h11.258.582.791.791.450.0098
341 California2016-Oct-09 08h11.893.901.890.891.400.0113
163 Erigone2016-Oct-09 11h11.961.652.221.222.310.0109
129 Antigone2016-Oct-11 11h11.65-7.443.192.224.880.0089
51 Nemausa2016-Oct-13 19h10.561.612.511.512.750.0110
91 Aegina2016-Oct-16 16h11.629.852.431.430.320.0099
57 Mnemosyne2016-Oct-19 00h10.737.392.811.820.970.0097
737 Arequipa2016-Oct-19 21h11.372.382.231.243.750.0112
65 Cybele2016-Oct-20 04h11.726.813.642.641.040.0077
1 Ceres2016-Oct-21 06h7.43-1.212.871.904.390.0094
345 Tercidina2016-Oct-22 15h11.0212.192.231.240.440.0116
308 Polyxo2016-Oct-23 17h11.758.552.751.751.180.0094
18 Melpomene2016-Oct-24 00h7.97-6.461.800.8310.560.0096
444 Gyptis2016-Oct-26 21h10.667.572.371.382.280.0102
313 Chaldaea2016-Oct-31 19h11.831.432.321.345.770.0115
79 Eurynome2016-Nov-03 18h9.5613.021.970.981.190.0100
234 Barbara2016-Nov-05 20h11.59-11.292.041.1113.340.0101
194 Prokne2016-Nov-19 19h11.42-8.792.521.6110.960.0099
287 Nephthys2016-Nov-24 02h11.464.212.401.446.750.0107
60 Echo2016-Nov-27 10h10.0515.602.011.032.770.0104

1 The speed column shows apparent speed across the sky at opposition. This should assist photographers to determine how frequently to take frames to obtain a trail (knowing pixels per degree in their telescope/camera configuration).

next to a chart provides a link to a red-on-black version, for display while observing.

 

Section Director
Steve Harvey

Section Director, Steve Harvey

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