C/1998 M3 (Larsen)
メタデータ
| 項目 |
値 |
| Designation |
C/1998 M3 (Larsen) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1998-07-17T02:37:10.369920Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:53Z |
| Obs used |
109 |
| NEO |
- |
| M1 |
6.500 |
| K1 |
10.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1998-08-29.0000000 |
| e |
1.00229380 |
| q (au) |
5.768232 |
| a (au) |
-2514.702905 |
| i (deg) |
113.422897 |
| Ω (om, deg) |
255.526698 |
| ω (w, deg) |
20.838100 |
| M (ma, deg) |
0.000335 |
等級
散乱 + 全体線形
$$
M_a = (2.182 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
2.182 |
| n |
6.000 |
| gf |
0.963 |
| 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) |
| 2026-02-03 00:00 |
05:24:06.96 |
+42:18:52.2 |
HIP 25064 |
24.08 |
| 2026-02-03 12:00 |
05:24:04.68 |
+42:18:37.9 |
HIP 25064 |
23.64 |
| 2026-02-04 00:00 |
05:24:02.43 |
+42:18:23.6 |
HIP 25064 |
23.21 |
| 2026-02-04 12:00 |
05:24:00.21 |
+42:18:09.2 |
HIP 25064 |
22.79 |
| 2026-02-05 00:00 |
05:23:58.01 |
+42:17:54.7 |
HIP 25064 |
22.38 |
| 2026-02-05 12:00 |
05:23:55.84 |
+42:17:40.2 |
HIP 25064 |
21.97 |
| 2026-02-06 00:00 |
05:23:53.70 |
+42:17:25.7 |
HIP 25064 |
21.57 |
| 2026-02-06 12:00 |
05:23:51.58 |
+42:17:11.1 |
HIP 25064 |
21.18 |
| 2026-02-07 00:00 |
05:23:49.49 |
+42:16:56.5 |
HIP 25064 |
20.79 |
| 2026-02-07 12:00 |
05:23:47.42 |
+42:16:41.8 |
HIP 25064 |
20.41 |
| 2026-02-08 00:00 |
05:23:45.38 |
+42:16:27.1 |
HIP 25064 |
20.05 |
| 2026-02-08 12:00 |
05:23:43.37 |
+42:16:12.4 |
HIP 25064 |
19.68 |
| 2026-02-09 00:00 |
05:23:41.38 |
+42:15:57.6 |
HIP 25064 |
19.33 |
| 2026-02-09 12:00 |
05:23:39.42 |
+42:15:42.7 |
HIP 25064 |
18.99 |
| 2026-02-10 00:00 |
05:23:37.49 |
+42:15:27.9 |
HIP 25064 |
18.65 |
| 2026-02-10 12:00 |
05:23:35.59 |
+42:15:13.0 |
HIP 25064 |
18.33 |
| 2026-02-11 00:00 |
05:23:33.71 |
+42:14:58.0 |
HIP 25064 |
18.01 |
| 2026-02-11 12:00 |
05:23:31.87 |
+42:14:43.1 |
HIP 25064 |
17.71 |
| 2026-02-12 00:00 |
05:23:30.05 |
+42:14:28.1 |
HIP 25064 |
17.41 |
| 2026-02-12 12:00 |
05:23:28.25 |
+42:14:13.0 |
HIP 25064 |
17.12 |
| 2026-02-13 00:00 |
05:23:26.49 |
+42:13:57.9 |
HIP 25064 |
16.85 |
| 2026-02-13 12:00 |
05:23:24.75 |
+42:13:42.8 |
HIP 25064 |
16.58 |
| 2026-02-14 00:00 |
05:23:23.04 |
+42:13:27.7 |
HIP 25064 |
16.33 |
| 2026-02-14 12:00 |
05:23:21.36 |
+42:13:12.6 |
HIP 25064 |
16.09 |
| 2026-02-15 00:00 |
05:23:19.71 |
+42:12:57.4 |
HIP 25064 |
15.86 |
| 2026-02-15 12:00 |
05:23:18.09 |
+42:12:42.2 |
HIP 25064 |
15.64 |
| 2026-02-16 00:00 |
05:23:16.49 |
+42:12:26.9 |
HIP 25064 |
15.43 |
| 2026-02-16 12:00 |
05:23:14.93 |
+42:12:11.7 |
HIP 25064 |
15.24 |
| 2026-02-17 00:00 |
05:23:13.39 |
+42:11:56.4 |
HIP 25064 |
15.06 |
| 2026-02-17 12:00 |
05:23:11.89 |
+42:11:41.1 |
HIP 25064 |
14.89 |
| 2026-02-18 00:00 |
05:23:10.41 |
+42:11:25.8 |
HIP 25064 |
14.73 |
| 2026-02-18 12:00 |
05:23:08.96 |
+42:11:10.4 |
HIP 25064 |
14.59 |
| 2026-02-19 00:00 |
05:23:07.54 |
+42:10:55.1 |
HIP 25064 |
14.46 |
| 2026-02-19 12:00 |
05:23:06.15 |
+42:10:39.7 |
HIP 25064 |
14.34 |
| 2026-02-20 00:00 |
05:23:04.79 |
+42:10:24.3 |
HIP 25064 |
14.24 |
| 2026-02-20 12:00 |
05:23:03.46 |
+42:10:08.9 |
HIP 25064 |
14.15 |
| 2026-02-21 00:00 |
05:23:02.15 |
+42:09:53.5 |
HIP 25064 |
14.07 |
| 2026-02-21 12:00 |
05:23:00.88 |
+42:09:38.0 |
HIP 25064 |
14.01 |
| 2026-02-22 00:00 |
05:22:59.64 |
+42:09:22.6 |
HIP 25064 |
13.96 |
| 2026-02-22 12:00 |
05:22:58.43 |
+42:09:07.2 |
HIP 25064 |
13.92 |
| 2026-02-23 00:00 |
05:22:57.24 |
+42:08:51.7 |
HIP 25064 |
13.89 |
| 2026-02-23 12:00 |
05:22:56.09 |
+42:08:36.2 |
HIP 25064 |
13.88 |
| 2026-02-24 00:00 |
05:22:54.97 |
+42:08:20.8 |
HIP 25064 |
13.88 |