メタデータ
| 項目 |
値 |
| Designation |
85D/Boethin |
| Type |
D |
| Perihelion (tp_cal, UTC) |
2008-12-12T17:55:03.103680Z |
| Orbit solution date (soln_date, UTC) |
2007-09-25T13:47:46Z |
| Obs used |
51 |
| NEO |
Yes |
| M1 |
- |
| K1 |
- |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2007-06-01.0000000 |
| e |
0.78116063 |
| q (au) |
1.134657 |
| a (au) |
5.184887 |
| i (deg) |
4.295295 |
| Ω (om, deg) |
359.396114 |
| ω (w, deg) |
37.618385 |
| M (ma, deg) |
313.187511 |
等級
散乱 + 全体線形
$$
M_a = (8.705 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.705 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.865 |
| k |
1.000 |
| δ90 |
9.984 |
| パラメータ |
記号 |
範囲 |
説明 |
| 太陽・地球距離が1 AUのときの絶対等級 |
H0 |
-5 to 20 |
彗星の固有の明るさ |
| 測光スロープパラメータ |
n |
2 to 6 |
太陽距離に対する明るさ変化率 |
| 前方散乱非対称係数 |
gf |
0.8 to 1 |
前方散乱の強さ |
| 後方散乱非対称係数 |
gb |
-1 to -0.5 |
後方散乱の強さ |
| 分配係数 |
k |
0.8 to 1 |
前方/後方散乱の寄与比 |
| ダスト/ガス明るさ比 |
δ90 |
1 to 10 |
ダスト散乱とガス放射の相対寄与 |
参考: EPSC-DPS2025-160
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
14:14:56.66 |
-18:04:27.4 |
HIP 69658 |
10.00 |
| 2026-05-12 12:00 |
14:14:44.84 |
-18:03:25.4 |
HIP 69658 |
12.70 |
| 2026-05-13 00:00 |
14:14:33.07 |
-18:02:23.4 |
HIP 69658 |
15.50 |
| 2026-05-13 12:00 |
14:14:21.33 |
-18:01:21.5 |
HIP 69658 |
18.35 |
| 2026-05-14 00:00 |
14:14:09.64 |
-18:00:19.5 |
HIP 69658 |
21.22 |
| 2026-05-14 12:00 |
14:13:57.99 |
-17:59:17.6 |
HIP 69658 |
24.11 |
| 2026-05-15 00:00 |
14:13:46.39 |
-17:58:15.7 |
HIP 69658 |
27.00 |
| 2026-05-15 12:00 |
14:13:34.83 |
-17:57:13.9 |
HIP 69362 |
24.56 |
| 2026-05-16 00:00 |
14:13:23.33 |
-17:56:12.1 |
HIP 69362 |
21.70 |
| 2026-05-16 12:00 |
14:13:11.87 |
-17:55:10.3 |
HIP 69362 |
18.86 |
| 2026-05-17 00:00 |
14:13:00.46 |
-17:54:08.7 |
HIP 69362 |
16.07 |
| 2026-05-17 12:00 |
14:12:49.10 |
-17:53:07.1 |
HIP 69362 |
13.33 |
| 2026-05-18 00:00 |
14:12:37.80 |
-17:52:05.5 |
HIP 69362 |
10.68 |
| 2026-05-18 12:00 |
14:12:26.55 |
-17:51:04.1 |
HIP 69362 |
8.20 |
| 2026-05-19 00:00 |
14:12:15.36 |
-17:50:02.8 |
HIP 69362 |
6.08 |
| 2026-05-19 12:00 |
14:12:04.23 |
-17:49:01.6 |
HIP 69362 |
4.80 |
| 2026-05-20 00:00 |
14:11:53.15 |
-17:48:00.5 |
HIP 69362 |
5.02 |
| 2026-05-20 12:00 |
14:11:42.14 |
-17:46:59.5 |
HIP 69362 |
6.58 |
| 2026-05-21 00:00 |
14:11:31.18 |
-17:45:58.6 |
HIP 69362 |
8.77 |
| 2026-05-21 12:00 |
14:11:20.29 |
-17:44:57.9 |
HIP 69362 |
11.22 |
| 2026-05-22 00:00 |
14:11:09.46 |
-17:43:57.3 |
HIP 69362 |
13.79 |
| 2026-05-22 12:00 |
14:10:58.69 |
-17:42:56.9 |
HIP 69362 |
16.41 |
| 2026-05-23 00:00 |
14:10:47.99 |
-17:41:56.6 |
HIP 69247 |
17.83 |
| 2026-05-23 12:00 |
14:10:37.36 |
-17:40:56.5 |
HIP 69247 |
18.53 |
| 2026-05-24 00:00 |
14:10:26.79 |
-17:39:56.6 |
HIP 69247 |
19.58 |
| 2026-05-24 12:00 |
14:10:16.29 |
-17:38:56.8 |
HIP 69247 |
20.93 |
| 2026-05-25 00:00 |
14:10:05.86 |
-17:37:57.2 |
HIP 69111 |
18.99 |
| 2026-05-25 12:00 |
14:09:55.50 |
-17:36:57.9 |
HIP 69111 |
17.07 |
| 2026-05-26 00:00 |
14:09:45.21 |
-17:35:58.7 |
HIP 69111 |
15.39 |
| 2026-05-26 12:00 |
14:09:34.99 |
-17:34:59.7 |
HIP 69111 |
14.01 |
| 2026-05-27 00:00 |
14:09:24.85 |
-17:34:00.9 |
HIP 69111 |
13.04 |
| 2026-05-27 12:00 |
14:09:14.77 |
-17:33:02.4 |
HIP 69111 |
12.54 |
| 2026-05-28 00:00 |
14:09:04.78 |
-17:32:04.0 |
HIP 69111 |
12.58 |
| 2026-05-28 12:00 |
14:08:54.86 |
-17:31:05.9 |
HIP 69111 |
13.12 |
| 2026-05-29 00:00 |
14:08:45.01 |
-17:30:08.1 |
HIP 69111 |
14.10 |
| 2026-05-29 12:00 |
14:08:35.25 |
-17:29:10.4 |
HIP 69111 |
15.44 |
| 2026-05-30 00:00 |
14:08:25.56 |
-17:28:13.1 |
HIP 69111 |
17.03 |
| 2026-05-30 12:00 |
14:08:15.95 |
-17:27:15.9 |
HIP 69111 |
18.81 |
| 2026-05-31 00:00 |
14:08:06.42 |
-17:26:19.1 |
HIP 69111 |
20.73 |
| 2026-05-31 12:00 |
14:07:56.97 |
-17:25:22.5 |
HIP 68918 |
20.07 |
| 2026-06-01 00:00 |
14:07:47.61 |
-17:24:26.2 |
HIP 68918 |
17.98 |
| 2026-06-01 12:00 |
14:07:38.32 |
-17:23:30.1 |
HIP 68918 |
16.00 |
| 2026-06-02 00:00 |
14:07:29.12 |
-17:22:34.4 |
HIP 68918 |
14.17 |