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) |
| 2026-05-12 00:00 |
08:53:36.05 |
+63:17:17.1 |
HIP 43793 |
15.01 |
| 2026-05-12 12:00 |
08:53:36.40 |
+63:17:07.0 |
HIP 43793 |
15.11 |
| 2026-05-13 00:00 |
08:53:36.76 |
+63:16:56.8 |
HIP 43793 |
15.21 |
| 2026-05-13 12:00 |
08:53:37.14 |
+63:16:46.7 |
HIP 43793 |
15.30 |
| 2026-05-14 00:00 |
08:53:37.54 |
+63:16:36.5 |
HIP 43793 |
15.40 |
| 2026-05-14 12:00 |
08:53:37.95 |
+63:16:26.3 |
HIP 43793 |
15.50 |
| 2026-05-15 00:00 |
08:53:38.38 |
+63:16:16.2 |
HIP 43793 |
15.59 |
| 2026-05-15 12:00 |
08:53:38.83 |
+63:16:06.0 |
HIP 43793 |
15.69 |
| 2026-05-16 00:00 |
08:53:39.29 |
+63:15:55.8 |
HIP 43793 |
15.79 |
| 2026-05-16 12:00 |
08:53:39.77 |
+63:15:45.6 |
HIP 43793 |
15.89 |
| 2026-05-17 00:00 |
08:53:40.26 |
+63:15:35.5 |
HIP 43793 |
15.98 |
| 2026-05-17 12:00 |
08:53:40.77 |
+63:15:25.3 |
HIP 43793 |
16.08 |
| 2026-05-18 00:00 |
08:53:41.30 |
+63:15:15.1 |
HIP 43793 |
16.18 |
| 2026-05-18 12:00 |
08:53:41.84 |
+63:15:04.9 |
HIP 43793 |
16.28 |
| 2026-05-19 00:00 |
08:53:42.40 |
+63:14:54.8 |
HIP 43793 |
16.38 |
| 2026-05-19 12:00 |
08:53:42.97 |
+63:14:44.6 |
HIP 43793 |
16.48 |
| 2026-05-20 00:00 |
08:53:43.56 |
+63:14:34.5 |
HIP 43793 |
16.58 |
| 2026-05-20 12:00 |
08:53:44.17 |
+63:14:24.3 |
HIP 43793 |
16.68 |
| 2026-05-21 00:00 |
08:53:44.79 |
+63:14:14.2 |
HIP 43793 |
16.78 |
| 2026-05-21 12:00 |
08:53:45.43 |
+63:14:04.0 |
HIP 43793 |
16.88 |
| 2026-05-22 00:00 |
08:53:46.08 |
+63:13:53.9 |
HIP 43793 |
16.98 |
| 2026-05-22 12:00 |
08:53:46.75 |
+63:13:43.8 |
HIP 43793 |
17.08 |
| 2026-05-23 00:00 |
08:53:47.43 |
+63:13:33.7 |
HIP 43793 |
17.18 |
| 2026-05-23 12:00 |
08:53:48.13 |
+63:13:23.5 |
HIP 43793 |
17.29 |
| 2026-05-24 00:00 |
08:53:48.84 |
+63:13:13.5 |
HIP 43793 |
17.39 |
| 2026-05-24 12:00 |
08:53:49.57 |
+63:13:03.4 |
HIP 43793 |
17.49 |
| 2026-05-25 00:00 |
08:53:50.32 |
+63:12:53.3 |
HIP 43793 |
17.59 |
| 2026-05-25 12:00 |
08:53:51.08 |
+63:12:43.2 |
HIP 43793 |
17.70 |
| 2026-05-26 00:00 |
08:53:51.85 |
+63:12:33.2 |
HIP 43793 |
17.80 |
| 2026-05-26 12:00 |
08:53:52.64 |
+63:12:23.2 |
HIP 43793 |
17.90 |
| 2026-05-27 00:00 |
08:53:53.45 |
+63:12:13.1 |
HIP 43793 |
18.01 |
| 2026-05-27 12:00 |
08:53:54.27 |
+63:12:03.1 |
HIP 43793 |
18.11 |
| 2026-05-28 00:00 |
08:53:55.10 |
+63:11:53.2 |
HIP 43793 |
18.22 |
| 2026-05-28 12:00 |
08:53:55.95 |
+63:11:43.2 |
HIP 43793 |
18.33 |
| 2026-05-29 00:00 |
08:53:56.81 |
+63:11:33.2 |
HIP 43793 |
18.43 |
| 2026-05-29 12:00 |
08:53:57.69 |
+63:11:23.3 |
HIP 43793 |
18.54 |
| 2026-05-30 00:00 |
08:53:58.58 |
+63:11:13.4 |
HIP 43793 |
18.64 |
| 2026-05-30 12:00 |
08:53:59.49 |
+63:11:03.5 |
HIP 43793 |
18.75 |
| 2026-05-31 00:00 |
08:54:00.41 |
+63:10:53.6 |
HIP 43793 |
18.86 |
| 2026-05-31 12:00 |
08:54:01.34 |
+63:10:43.7 |
HIP 43793 |
18.97 |
| 2026-06-01 00:00 |
08:54:02.29 |
+63:10:33.9 |
HIP 43793 |
19.08 |
| 2026-06-01 12:00 |
08:54:03.25 |
+63:10:24.1 |
HIP 43793 |
19.19 |
| 2026-06-02 00:00 |
08:54:04.23 |
+63:10:14.3 |
HIP 43793 |
19.29 |