メタデータ
| 項目 |
値 |
| Designation |
C/1997 L1 (Zhu-Balam) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1996-11-22T20:49:19.153920Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:51Z |
| Obs used |
213 |
| NEO |
- |
| M1 |
6.500 |
| K1 |
10.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1997-08-22.0000000 |
| e |
0.99797377 |
| q (au) |
4.899563 |
| a (au) |
2418.066374 |
| i (deg) |
72.991461 |
| Ω (om, deg) |
233.299834 |
| ω (w, deg) |
346.364690 |
| M (ma, deg) |
0.002256 |
等級
散乱 + 全体線形
$$
M_a = (2.899 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
2.899 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
1.000 |
| 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 |
00:29:21.64 |
+56:13:35.0 |
HIP 2450 |
20.32 |
| 2026-07-29 12:00 |
00:29:20.02 |
+56:13:54.8 |
HIP 2450 |
20.70 |
| 2026-07-30 00:00 |
00:29:18.36 |
+56:14:14.4 |
HIP 2450 |
21.09 |
| 2026-07-30 12:00 |
00:29:16.68 |
+56:14:33.9 |
HIP 2450 |
21.48 |
| 2026-07-31 00:00 |
00:29:14.97 |
+56:14:53.2 |
HIP 2450 |
21.88 |
| 2026-07-31 12:00 |
00:29:13.22 |
+56:15:12.3 |
HIP 2450 |
22.27 |
| 2026-08-01 00:00 |
00:29:11.45 |
+56:15:31.2 |
HIP 2450 |
22.66 |
| 2026-08-01 12:00 |
00:29:09.65 |
+56:15:50.0 |
HIP 2450 |
23.06 |
| 2026-08-02 00:00 |
00:29:07.82 |
+56:16:08.5 |
HIP 2450 |
23.46 |
| 2026-08-02 12:00 |
00:29:05.96 |
+56:16:26.9 |
HIP 2096 |
23.63 |
| 2026-08-03 00:00 |
00:29:04.07 |
+56:16:45.1 |
HIP 2096 |
23.52 |
| 2026-08-03 12:00 |
00:29:02.15 |
+56:17:03.1 |
HIP 2096 |
23.41 |
| 2026-08-04 00:00 |
00:29:00.21 |
+56:17:20.9 |
HIP 2096 |
23.30 |
| 2026-08-04 12:00 |
00:28:58.23 |
+56:17:38.5 |
HIP 2096 |
23.19 |
| 2026-08-05 00:00 |
00:28:56.23 |
+56:17:56.0 |
HIP 2096 |
23.08 |
| 2026-08-05 12:00 |
00:28:54.20 |
+56:18:13.2 |
HIP 2096 |
22.97 |
| 2026-08-06 00:00 |
00:28:52.14 |
+56:18:30.3 |
HIP 2096 |
22.87 |
| 2026-08-06 12:00 |
00:28:50.05 |
+56:18:47.1 |
HIP 2096 |
22.76 |
| 2026-08-07 00:00 |
00:28:47.93 |
+56:19:03.8 |
HIP 2096 |
22.66 |
| 2026-08-07 12:00 |
00:28:45.79 |
+56:19:20.2 |
HIP 2096 |
22.56 |
| 2026-08-08 00:00 |
00:28:43.62 |
+56:19:36.5 |
HIP 2096 |
22.47 |
| 2026-08-08 12:00 |
00:28:41.42 |
+56:19:52.5 |
HIP 2096 |
22.37 |
| 2026-08-09 00:00 |
00:28:39.19 |
+56:20:08.4 |
HIP 2096 |
22.28 |
| 2026-08-09 12:00 |
00:28:36.94 |
+56:20:24.0 |
HIP 2096 |
22.18 |
| 2026-08-10 00:00 |
00:28:34.66 |
+56:20:39.4 |
HIP 2096 |
22.09 |
| 2026-08-10 12:00 |
00:28:32.35 |
+56:20:54.7 |
HIP 2096 |
22.01 |
| 2026-08-11 00:00 |
00:28:30.01 |
+56:21:09.7 |
HIP 2096 |
21.92 |
| 2026-08-11 12:00 |
00:28:27.65 |
+56:21:24.5 |
HIP 2096 |
21.84 |
| 2026-08-12 00:00 |
00:28:25.26 |
+56:21:39.1 |
HIP 2096 |
21.76 |
| 2026-08-12 12:00 |
00:28:22.85 |
+56:21:53.4 |
HIP 2096 |
21.68 |
| 2026-08-13 00:00 |
00:28:20.41 |
+56:22:07.6 |
HIP 2101 |
21.48 |
| 2026-08-13 12:00 |
00:28:17.94 |
+56:22:21.5 |
HIP 2101 |
21.08 |
| 2026-08-14 00:00 |
00:28:15.45 |
+56:22:35.2 |
HIP 2101 |
20.68 |
| 2026-08-14 12:00 |
00:28:12.93 |
+56:22:48.7 |
HIP 2101 |
20.29 |
| 2026-08-15 00:00 |
00:28:10.39 |
+56:23:02.0 |
HIP 2101 |
19.89 |
| 2026-08-15 12:00 |
00:28:07.82 |
+56:23:15.0 |
HIP 2101 |
19.50 |
| 2026-08-16 00:00 |
00:28:05.23 |
+56:23:27.9 |
HIP 2101 |
19.11 |
| 2026-08-16 12:00 |
00:28:02.61 |
+56:23:40.5 |
HIP 2101 |
18.72 |
| 2026-08-17 00:00 |
00:27:59.97 |
+56:23:52.8 |
HIP 2101 |
18.34 |
| 2026-08-17 12:00 |
00:27:57.31 |
+56:24:05.0 |
HIP 2101 |
17.95 |
| 2026-08-18 00:00 |
00:27:54.62 |
+56:24:16.9 |
HIP 2101 |
17.57 |
| 2026-08-18 12:00 |
00:27:51.90 |
+56:24:28.6 |
HIP 2101 |
17.20 |
| 2026-08-19 00:00 |
00:27:49.17 |
+56:24:40.0 |
HIP 2101 |
16.82 |