メタデータ
| 項目 |
値 |
| Designation |
C/1998 T1 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1999-06-25T05:58:21.192960Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:57Z |
| Obs used |
376 |
| NEO |
- |
| M1 |
12.200 |
| 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) |
1999-05-05.0000000 |
| e |
0.99911409 |
| q (au) |
1.467728 |
| a (au) |
1656.736959 |
| i (deg) |
170.159948 |
| Ω (om, deg) |
153.357852 |
| ω (w, deg) |
226.351694 |
| M (ma, deg) |
359.999251 |
等級
散乱 + 全体線形
$$
M_a = (9.231 + 4.429\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.231 |
| n |
4.429 |
| gf |
1.000 |
| gb |
-0.516 |
| 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 |
08:42:18.42 |
+22:41:10.0 |
HIP 42840 |
20.17 |
| 2026-07-29 12:00 |
08:42:20.78 |
+22:41:01.4 |
HIP 42840 |
19.64 |
| 2026-07-30 00:00 |
08:42:23.14 |
+22:40:52.8 |
HIP 42840 |
19.11 |
| 2026-07-30 12:00 |
08:42:25.50 |
+22:40:44.2 |
HIP 42840 |
18.59 |
| 2026-07-31 00:00 |
08:42:27.86 |
+22:40:35.7 |
HIP 42840 |
18.06 |
| 2026-07-31 12:00 |
08:42:30.22 |
+22:40:27.2 |
HIP 42840 |
17.54 |
| 2026-08-01 00:00 |
08:42:32.58 |
+22:40:18.7 |
HIP 42840 |
17.02 |
| 2026-08-01 12:00 |
08:42:34.94 |
+22:40:10.2 |
HIP 42840 |
16.51 |
| 2026-08-02 00:00 |
08:42:37.29 |
+22:40:01.7 |
HIP 42840 |
15.99 |
| 2026-08-02 12:00 |
08:42:39.65 |
+22:39:53.3 |
HIP 42840 |
15.48 |
| 2026-08-03 00:00 |
08:42:42.01 |
+22:39:44.9 |
HIP 42840 |
14.98 |
| 2026-08-03 12:00 |
08:42:44.37 |
+22:39:36.5 |
HIP 42840 |
14.48 |
| 2026-08-04 00:00 |
08:42:46.72 |
+22:39:28.1 |
HIP 42840 |
13.98 |
| 2026-08-04 12:00 |
08:42:49.08 |
+22:39:19.8 |
HIP 42840 |
13.49 |
| 2026-08-05 00:00 |
08:42:51.43 |
+22:39:11.5 |
HIP 42840 |
13.00 |
| 2026-08-05 12:00 |
08:42:53.78 |
+22:39:03.2 |
HIP 42840 |
12.52 |
| 2026-08-06 00:00 |
08:42:56.13 |
+22:38:54.9 |
HIP 42840 |
12.05 |
| 2026-08-06 12:00 |
08:42:58.48 |
+22:38:46.7 |
HIP 42840 |
11.59 |
| 2026-08-07 00:00 |
08:43:00.82 |
+22:38:38.5 |
HIP 42840 |
11.13 |
| 2026-08-07 12:00 |
08:43:03.17 |
+22:38:30.3 |
HIP 42840 |
10.69 |
| 2026-08-08 00:00 |
08:43:05.51 |
+22:38:22.2 |
HIP 42840 |
10.25 |
| 2026-08-08 12:00 |
08:43:07.85 |
+22:38:14.1 |
HIP 42840 |
9.83 |
| 2026-08-09 00:00 |
08:43:10.19 |
+22:38:06.0 |
HIP 42840 |
9.42 |
| 2026-08-09 12:00 |
08:43:12.52 |
+22:37:57.9 |
HIP 42840 |
9.03 |
| 2026-08-10 00:00 |
08:43:14.85 |
+22:37:49.9 |
HIP 42840 |
8.66 |
| 2026-08-10 12:00 |
08:43:17.18 |
+22:37:41.9 |
HIP 42840 |
8.30 |
| 2026-08-11 00:00 |
08:43:19.50 |
+22:37:33.9 |
HIP 42840 |
7.97 |
| 2026-08-11 12:00 |
08:43:21.82 |
+22:37:26.0 |
HIP 42840 |
7.67 |
| 2026-08-12 00:00 |
08:43:24.14 |
+22:37:18.1 |
HIP 42840 |
7.40 |
| 2026-08-12 12:00 |
08:43:26.46 |
+22:37:10.2 |
HIP 42840 |
7.15 |
| 2026-08-13 00:00 |
08:43:28.76 |
+22:37:02.4 |
HIP 42840 |
6.95 |
| 2026-08-13 12:00 |
08:43:31.07 |
+22:36:54.6 |
HIP 42840 |
6.78 |
| 2026-08-14 00:00 |
08:43:33.37 |
+22:36:46.9 |
HIP 42840 |
6.65 |
| 2026-08-14 12:00 |
08:43:35.67 |
+22:36:39.2 |
HIP 42840 |
6.56 |
| 2026-08-15 00:00 |
08:43:37.96 |
+22:36:31.5 |
HIP 42840 |
6.52 |
| 2026-08-15 12:00 |
08:43:40.25 |
+22:36:23.9 |
HIP 42840 |
6.52 |
| 2026-08-16 00:00 |
08:43:42.53 |
+22:36:16.3 |
HIP 42840 |
6.57 |
| 2026-08-16 12:00 |
08:43:44.80 |
+22:36:08.7 |
HIP 42840 |
6.66 |
| 2026-08-17 00:00 |
08:43:47.07 |
+22:36:01.2 |
HIP 42840 |
6.79 |
| 2026-08-17 12:00 |
08:43:49.34 |
+22:35:53.7 |
HIP 42840 |
6.96 |
| 2026-08-18 00:00 |
08:43:51.60 |
+22:35:46.3 |
HIP 42840 |
7.16 |
| 2026-08-18 12:00 |
08:43:53.85 |
+22:35:38.9 |
HIP 42840 |
7.40 |
| 2026-08-19 00:00 |
08:43:56.10 |
+22:35:31.5 |
HIP 42840 |
7.67 |