79P/du Toit-Hartley
メタデータ
| 項目 |
値 |
| Designation |
79P/du Toit-Hartley |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2008-05-28T09:52:27.811200Z |
| Orbit solution date (soln_date, UTC) |
2021-05-04T14:20:50Z |
| Obs used |
215 |
| NEO |
Yes |
| M1 |
17.400 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2007-10-18.0000000 |
| e |
0.59408527 |
| q (au) |
1.230504 |
| a (au) |
3.031435 |
| i (deg) |
2.893178 |
| Ω (om, deg) |
307.838646 |
| ω (w, deg) |
253.269688 |
| M (ma, deg) |
318.280693 |
等級
散乱 + 全体線形
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
00:27:20.93 |
+06:01:39.4 |
HIP 2083 |
16.07 |
| 2026-02-03 12:00 |
00:27:39.28 |
+06:03:22.3 |
HIP 2083 |
20.25 |
| 2026-02-04 00:00 |
00:27:57.73 |
+06:05:05.9 |
HIP 2083 |
24.71 |
| 2026-02-04 12:00 |
00:28:16.28 |
+06:06:50.1 |
HIP 2083 |
29.34 |
| 2026-02-05 00:00 |
00:28:34.92 |
+06:08:35.1 |
HIP 2387 |
29.30 |
| 2026-02-05 12:00 |
00:28:53.66 |
+06:10:20.8 |
HIP 2356 |
25.48 |
| 2026-02-06 00:00 |
00:29:12.49 |
+06:12:07.2 |
HIP 2356 |
20.98 |
| 2026-02-06 12:00 |
00:29:31.42 |
+06:13:54.3 |
HIP 2356 |
16.74 |
| 2026-02-07 00:00 |
00:29:50.45 |
+06:15:42.0 |
HIP 2356 |
13.06 |
| 2026-02-07 12:00 |
00:30:09.56 |
+06:17:30.4 |
HIP 2356 |
10.57 |
| 2026-02-08 00:00 |
00:30:28.77 |
+06:19:19.5 |
HIP 2356 |
10.22 |
| 2026-02-08 12:00 |
00:30:48.07 |
+06:21:09.2 |
HIP 2356 |
12.24 |
| 2026-02-09 00:00 |
00:31:07.46 |
+06:22:59.6 |
HIP 2356 |
15.76 |
| 2026-02-09 12:00 |
00:31:26.95 |
+06:24:50.7 |
HIP 2356 |
20.02 |
| 2026-02-10 00:00 |
00:31:46.52 |
+06:26:42.3 |
HIP 2356 |
24.66 |
| 2026-02-10 12:00 |
00:32:06.17 |
+06:28:34.7 |
HIP 2548 |
29.08 |
| 2026-02-11 00:00 |
00:32:25.92 |
+06:30:27.6 |
HIP 2548 |
26.87 |
| 2026-02-11 12:00 |
00:32:45.75 |
+06:32:21.2 |
HIP 2548 |
25.56 |
| 2026-02-12 00:00 |
00:33:05.67 |
+06:34:15.4 |
HIP 2548 |
25.31 |
| 2026-02-12 12:00 |
00:33:25.67 |
+06:36:10.2 |
HIP 2548 |
26.15 |
| 2026-02-13 00:00 |
00:33:45.76 |
+06:38:05.6 |
HIP 2548 |
28.01 |
| 2026-02-13 12:00 |
00:34:05.93 |
+06:40:01.6 |
HIP 2548 |
30.70 |
| 2026-02-14 00:00 |
00:34:26.19 |
+06:41:58.2 |
HIP 2831 |
29.79 |
| 2026-02-14 12:00 |
00:34:46.52 |
+06:43:55.4 |
HIP 2831 |
27.83 |
| 2026-02-15 00:00 |
00:35:06.94 |
+06:45:53.1 |
HIP 2831 |
26.84 |
| 2026-02-15 12:00 |
00:35:27.43 |
+06:47:51.5 |
HIP 2847 |
23.30 |
| 2026-02-16 00:00 |
00:35:48.01 |
+06:49:50.4 |
HIP 2847 |
19.90 |
| 2026-02-16 12:00 |
00:36:08.66 |
+06:51:49.9 |
HIP 2847 |
17.57 |
| 2026-02-17 00:00 |
00:36:29.39 |
+06:53:49.9 |
HIP 2847 |
16.79 |
| 2026-02-17 12:00 |
00:36:50.20 |
+06:55:50.5 |
HIP 2847 |
17.78 |
| 2026-02-18 00:00 |
00:37:11.08 |
+06:57:51.6 |
HIP 2847 |
20.31 |
| 2026-02-18 12:00 |
00:37:32.04 |
+06:59:53.2 |
HIP 2847 |
23.89 |
| 2026-02-19 00:00 |
00:37:53.07 |
+07:01:55.4 |
HIP 2847 |
28.15 |
| 2026-02-19 12:00 |
00:38:14.17 |
+07:03:58.1 |
HIP 2847 |
32.83 |
| 2026-02-20 00:00 |
00:38:35.35 |
+07:06:01.3 |
HIP 2847 |
37.78 |
| 2026-02-20 12:00 |
00:38:56.59 |
+07:08:05.0 |
HIP 2847 |
42.92 |
| 2026-02-21 00:00 |
00:39:17.91 |
+07:10:09.2 |
HIP 3161 |
39.64 |
| 2026-02-21 12:00 |
00:39:39.30 |
+07:12:13.9 |
HIP 3161 |
36.09 |
| 2026-02-22 00:00 |
00:40:00.75 |
+07:14:19.0 |
HIP 3161 |
33.15 |
| 2026-02-22 12:00 |
00:40:22.28 |
+07:16:24.7 |
HIP 3161 |
30.97 |
| 2026-02-23 00:00 |
00:40:43.87 |
+07:18:30.8 |
HIP 3161 |
29.76 |
| 2026-02-23 12:00 |
00:41:05.52 |
+07:20:37.4 |
HIP 3161 |
29.63 |
| 2026-02-24 00:00 |
00:41:27.24 |
+07:22:44.5 |
HIP 3161 |
30.61 |