メタデータ
| 項目 |
値 |
| Designation |
C/1999 T2 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2000-11-24T11:11:44.891520Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:02Z |
| Obs used |
1021 |
| NEO |
- |
| M1 |
8.400 |
| K1 |
8.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2000-10-10.0000000 |
| e |
1.00201162 |
| q (au) |
3.037404 |
| a (au) |
-1509.929133 |
| i (deg) |
111.002049 |
| Ω (om, deg) |
14.878823 |
| ω (w, deg) |
104.667943 |
| M (ma, deg) |
-0.000764 |
等級
散乱 + 全体線形
$$
M_a = (6.101 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
6.101 |
| n |
6.000 |
| gf |
0.999 |
| gb |
-0.731 |
| 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 |
07:58:48.66 |
-44:57:23.9 |
HIP 39107 |
13.78 |
| 2026-07-29 12:00 |
07:58:51.89 |
-44:57:32.4 |
HIP 39107 |
13.19 |
| 2026-07-30 00:00 |
07:58:55.12 |
-44:57:41.2 |
HIP 39107 |
12.60 |
| 2026-07-30 12:00 |
07:58:58.35 |
-44:57:50.3 |
HIP 39107 |
12.01 |
| 2026-07-31 00:00 |
07:59:01.57 |
-44:57:59.6 |
HIP 39107 |
11.42 |
| 2026-07-31 12:00 |
07:59:04.79 |
-44:58:09.2 |
HIP 39107 |
10.83 |
| 2026-08-01 00:00 |
07:59:08.01 |
-44:58:19.1 |
HIP 39107 |
10.24 |
| 2026-08-01 12:00 |
07:59:11.21 |
-44:58:29.2 |
HIP 39107 |
9.65 |
| 2026-08-02 00:00 |
07:59:14.41 |
-44:58:39.7 |
HIP 39107 |
9.06 |
| 2026-08-02 12:00 |
07:59:17.61 |
-44:58:50.4 |
HIP 39107 |
8.46 |
| 2026-08-03 00:00 |
07:59:20.80 |
-44:59:01.3 |
HIP 39107 |
7.87 |
| 2026-08-03 12:00 |
07:59:23.98 |
-44:59:12.6 |
HIP 39107 |
7.28 |
| 2026-08-04 00:00 |
07:59:27.16 |
-44:59:24.1 |
HIP 39107 |
6.68 |
| 2026-08-04 12:00 |
07:59:30.33 |
-44:59:35.8 |
HIP 39107 |
6.09 |
| 2026-08-05 00:00 |
07:59:33.49 |
-44:59:47.9 |
HIP 39107 |
5.50 |
| 2026-08-05 12:00 |
07:59:36.65 |
-45:00:00.2 |
HIP 39107 |
4.90 |
| 2026-08-06 00:00 |
07:59:39.80 |
-45:00:12.7 |
HIP 39107 |
4.31 |
| 2026-08-06 12:00 |
07:59:42.94 |
-45:00:25.6 |
HIP 39107 |
3.71 |
| 2026-08-07 00:00 |
07:59:46.08 |
-45:00:38.7 |
HIP 39107 |
3.12 |
| 2026-08-07 12:00 |
07:59:49.20 |
-45:00:52.1 |
HIP 39107 |
2.53 |
| 2026-08-08 00:00 |
07:59:52.32 |
-45:01:05.7 |
HIP 39107 |
1.94 |
| 2026-08-08 12:00 |
07:59:55.43 |
-45:01:19.6 |
HIP 39107 |
1.35 |
| 2026-08-09 00:00 |
07:59:58.53 |
-45:01:33.8 |
HIP 39107 |
0.79 |
| 2026-08-09 12:00 |
08:00:01.62 |
-45:01:48.2 |
HIP 39107 |
0.35 |
| 2026-08-10 00:00 |
08:00:04.70 |
-45:02:02.9 |
HIP 39107 |
0.59 |
| 2026-08-10 12:00 |
08:00:07.78 |
-45:02:17.8 |
HIP 39107 |
1.13 |
| 2026-08-11 00:00 |
08:00:10.84 |
-45:02:33.0 |
HIP 39107 |
1.72 |
| 2026-08-11 12:00 |
08:00:13.89 |
-45:02:48.5 |
HIP 39107 |
2.31 |
| 2026-08-12 00:00 |
08:00:16.94 |
-45:03:04.2 |
HIP 39107 |
2.90 |
| 2026-08-12 12:00 |
08:00:19.97 |
-45:03:20.2 |
HIP 39107 |
3.50 |
| 2026-08-13 00:00 |
08:00:22.99 |
-45:03:36.5 |
HIP 39107 |
4.09 |
| 2026-08-13 12:00 |
08:00:26.00 |
-45:03:53.0 |
HIP 39107 |
4.69 |
| 2026-08-14 00:00 |
08:00:29.00 |
-45:04:09.7 |
HIP 39107 |
5.29 |
| 2026-08-14 12:00 |
08:00:31.99 |
-45:04:26.7 |
HIP 39107 |
5.89 |
| 2026-08-15 00:00 |
08:00:34.97 |
-45:04:44.0 |
HIP 39107 |
6.49 |
| 2026-08-15 12:00 |
08:00:37.93 |
-45:05:01.5 |
HIP 39107 |
7.09 |
| 2026-08-16 00:00 |
08:00:40.89 |
-45:05:19.2 |
HIP 39107 |
7.69 |
| 2026-08-16 12:00 |
08:00:43.83 |
-45:05:37.2 |
HIP 39107 |
8.29 |
| 2026-08-17 00:00 |
08:00:46.76 |
-45:05:55.5 |
HIP 39107 |
8.89 |
| 2026-08-17 12:00 |
08:00:49.68 |
-45:06:14.0 |
HIP 39107 |
9.49 |
| 2026-08-18 00:00 |
08:00:52.58 |
-45:06:32.7 |
HIP 39107 |
10.09 |
| 2026-08-18 12:00 |
08:00:55.47 |
-45:06:51.7 |
HIP 39241 |
9.57 |
| 2026-08-19 00:00 |
08:00:58.35 |
-45:07:10.9 |
HIP 39241 |
8.99 |