メタデータ
| 項目 |
値 |
| Designation |
C/1915 C1 (Mellish) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1915-07-17T15:36:50.613120Z |
| Orbit solution date (soln_date, UTC) |
2024-04-15T15:43:28Z |
| Obs used |
94 |
| NEO |
- |
| M1 |
7.700 |
| 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) |
1915-06-30.0000000 |
| e |
1.00027442 |
| q (au) |
1.005324 |
| a (au) |
-3663.395604 |
| i (deg) |
54.791644 |
| Ω (om, deg) |
73.453125 |
| ω (w, deg) |
247.782134 |
| M (ma, deg) |
-0.000078 |
等級
散乱 + 全体線形
$$
M_a = (9.514 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.514 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.852 |
| k |
0.800 |
| δ90 |
10.000 |
| 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) |
| 2026-07-29 00:00 |
08:57:04.23 |
+62:56:31.4 |
HIP 43999 |
15.91 |
| 2026-07-29 12:00 |
08:57:06.16 |
+62:56:27.8 |
HIP 43999 |
15.80 |
| 2026-07-30 00:00 |
08:57:08.10 |
+62:56:24.4 |
HIP 43999 |
15.70 |
| 2026-07-30 12:00 |
08:57:10.04 |
+62:56:21.0 |
HIP 43999 |
15.61 |
| 2026-07-31 00:00 |
08:57:11.98 |
+62:56:17.7 |
HIP 43999 |
15.52 |
| 2026-07-31 12:00 |
08:57:13.92 |
+62:56:14.4 |
HIP 43999 |
15.43 |
| 2026-08-01 00:00 |
08:57:15.86 |
+62:56:11.3 |
HIP 43999 |
15.35 |
| 2026-08-01 12:00 |
08:57:17.80 |
+62:56:08.2 |
HIP 43999 |
15.27 |
| 2026-08-02 00:00 |
08:57:19.74 |
+62:56:05.2 |
HIP 43999 |
15.19 |
| 2026-08-02 12:00 |
08:57:21.69 |
+62:56:02.3 |
HIP 43999 |
15.12 |
| 2026-08-03 00:00 |
08:57:23.63 |
+62:55:59.4 |
HIP 43999 |
15.05 |
| 2026-08-03 12:00 |
08:57:25.58 |
+62:55:56.7 |
HIP 43999 |
14.99 |
| 2026-08-04 00:00 |
08:57:27.52 |
+62:55:54.0 |
HIP 43999 |
14.94 |
| 2026-08-04 12:00 |
08:57:29.47 |
+62:55:51.4 |
HIP 43999 |
14.88 |
| 2026-08-05 00:00 |
08:57:31.41 |
+62:55:48.9 |
HIP 43999 |
14.84 |
| 2026-08-05 12:00 |
08:57:33.36 |
+62:55:46.5 |
HIP 43999 |
14.79 |
| 2026-08-06 00:00 |
08:57:35.30 |
+62:55:44.1 |
HIP 43999 |
14.75 |
| 2026-08-06 12:00 |
08:57:37.25 |
+62:55:41.8 |
HIP 43999 |
14.72 |
| 2026-08-07 00:00 |
08:57:39.19 |
+62:55:39.6 |
HIP 43999 |
14.69 |
| 2026-08-07 12:00 |
08:57:41.13 |
+62:55:37.5 |
HIP 43999 |
14.67 |
| 2026-08-08 00:00 |
08:57:43.08 |
+62:55:35.5 |
HIP 43999 |
14.65 |
| 2026-08-08 12:00 |
08:57:45.02 |
+62:55:33.6 |
HIP 43999 |
14.63 |
| 2026-08-09 00:00 |
08:57:46.96 |
+62:55:31.7 |
HIP 43999 |
14.62 |
| 2026-08-09 12:00 |
08:57:48.90 |
+62:55:29.9 |
HIP 43999 |
14.62 |
| 2026-08-10 00:00 |
08:57:50.84 |
+62:55:28.2 |
HIP 43999 |
14.62 |
| 2026-08-10 12:00 |
08:57:52.77 |
+62:55:26.6 |
HIP 43999 |
14.62 |
| 2026-08-11 00:00 |
08:57:54.71 |
+62:55:25.1 |
HIP 43999 |
14.63 |
| 2026-08-11 12:00 |
08:57:56.64 |
+62:55:23.7 |
HIP 43999 |
14.64 |
| 2026-08-12 00:00 |
08:57:58.58 |
+62:55:22.3 |
HIP 43999 |
14.66 |
| 2026-08-12 12:00 |
08:58:00.51 |
+62:55:21.0 |
HIP 43999 |
14.68 |
| 2026-08-13 00:00 |
08:58:02.43 |
+62:55:19.8 |
HIP 43999 |
14.71 |
| 2026-08-13 12:00 |
08:58:04.36 |
+62:55:18.7 |
HIP 43999 |
14.74 |
| 2026-08-14 00:00 |
08:58:06.28 |
+62:55:17.7 |
HIP 43999 |
14.78 |
| 2026-08-14 12:00 |
08:58:08.20 |
+62:55:16.8 |
HIP 43999 |
14.82 |
| 2026-08-15 00:00 |
08:58:10.12 |
+62:55:15.9 |
HIP 43999 |
14.87 |
| 2026-08-15 12:00 |
08:58:12.04 |
+62:55:15.2 |
HIP 43999 |
14.92 |
| 2026-08-16 00:00 |
08:58:13.95 |
+62:55:14.5 |
HIP 43999 |
14.97 |
| 2026-08-16 12:00 |
08:58:15.86 |
+62:55:13.9 |
HIP 43999 |
15.03 |
| 2026-08-17 00:00 |
08:58:17.77 |
+62:55:13.4 |
HIP 43999 |
15.09 |
| 2026-08-17 12:00 |
08:58:19.67 |
+62:55:12.9 |
HIP 43999 |
15.16 |
| 2026-08-18 00:00 |
08:58:21.57 |
+62:55:12.6 |
HIP 43999 |
15.23 |
| 2026-08-18 12:00 |
08:58:23.46 |
+62:55:12.3 |
HIP 43999 |
15.31 |
| 2026-08-19 00:00 |
08:58:25.36 |
+62:55:12.2 |
HIP 43999 |
15.39 |