メタデータ
| 項目 |
値 |
| Designation |
C/2007 W3 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2008-06-02T19:04:58.730880Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:15Z |
| Obs used |
206 |
| NEO |
- |
| M1 |
15.300 |
| 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) |
2008-02-28.0000000 |
| e |
1.00016327 |
| q (au) |
1.776638 |
| a (au) |
-10881.860403 |
| i (deg) |
78.673550 |
| Ω (om, deg) |
73.069451 |
| ω (w, deg) |
112.625589 |
| M (ma, deg) |
-0.000083 |
等級
散乱 + 全体線形
$$
M_a = (16.097 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
16.097 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.577 |
| 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 |
03:54:54.53 |
-68:26:01.9 |
HIP 18577 |
21.04 |
| 2026-05-12 12:00 |
03:55:02.96 |
-68:25:50.9 |
HIP 18577 |
20.25 |
| 2026-05-13 00:00 |
03:55:11.39 |
-68:25:40.3 |
HIP 18577 |
19.45 |
| 2026-05-13 12:00 |
03:55:19.84 |
-68:25:30.0 |
HIP 18577 |
18.66 |
| 2026-05-14 00:00 |
03:55:28.29 |
-68:25:20.2 |
HIP 18577 |
17.86 |
| 2026-05-14 12:00 |
03:55:36.75 |
-68:25:10.7 |
HIP 18577 |
17.07 |
| 2026-05-15 00:00 |
03:55:45.22 |
-68:25:01.6 |
HIP 18577 |
16.28 |
| 2026-05-15 12:00 |
03:55:53.70 |
-68:24:52.8 |
HIP 18577 |
15.49 |
| 2026-05-16 00:00 |
03:56:02.19 |
-68:24:44.5 |
HIP 18577 |
14.70 |
| 2026-05-16 12:00 |
03:56:10.68 |
-68:24:36.5 |
HIP 18577 |
13.91 |
| 2026-05-17 00:00 |
03:56:19.17 |
-68:24:28.9 |
HIP 18577 |
13.13 |
| 2026-05-17 12:00 |
03:56:27.67 |
-68:24:21.7 |
HIP 18577 |
12.35 |
| 2026-05-18 00:00 |
03:56:36.18 |
-68:24:14.8 |
HIP 18577 |
11.57 |
| 2026-05-18 12:00 |
03:56:44.69 |
-68:24:08.3 |
HIP 18577 |
10.79 |
| 2026-05-19 00:00 |
03:56:53.20 |
-68:24:02.3 |
HIP 18577 |
10.02 |
| 2026-05-19 12:00 |
03:57:01.72 |
-68:23:56.6 |
HIP 18577 |
9.25 |
| 2026-05-20 00:00 |
03:57:10.24 |
-68:23:51.2 |
HIP 18577 |
8.49 |
| 2026-05-20 12:00 |
03:57:18.76 |
-68:23:46.3 |
HIP 18577 |
7.73 |
| 2026-05-21 00:00 |
03:57:27.28 |
-68:23:41.7 |
HIP 18577 |
6.99 |
| 2026-05-21 12:00 |
03:57:35.81 |
-68:23:37.5 |
HIP 18577 |
6.26 |
| 2026-05-22 00:00 |
03:57:44.33 |
-68:23:33.7 |
HIP 18577 |
5.55 |
| 2026-05-22 12:00 |
03:57:52.86 |
-68:23:30.3 |
HIP 18577 |
4.86 |
| 2026-05-23 00:00 |
03:58:01.38 |
-68:23:27.2 |
HIP 18577 |
4.22 |
| 2026-05-23 12:00 |
03:58:09.90 |
-68:23:24.5 |
HIP 18577 |
3.64 |
| 2026-05-24 00:00 |
03:58:18.42 |
-68:23:22.2 |
HIP 18577 |
3.16 |
| 2026-05-24 12:00 |
03:58:26.94 |
-68:23:20.3 |
HIP 18577 |
2.82 |
| 2026-05-25 00:00 |
03:58:35.46 |
-68:23:18.8 |
HIP 18577 |
2.69 |
| 2026-05-25 12:00 |
03:58:43.97 |
-68:23:17.6 |
HIP 18577 |
2.78 |
| 2026-05-26 00:00 |
03:58:52.48 |
-68:23:16.8 |
HIP 18577 |
3.09 |
| 2026-05-26 12:00 |
03:59:00.99 |
-68:23:16.4 |
HIP 18577 |
3.55 |
| 2026-05-27 00:00 |
03:59:09.49 |
-68:23:16.3 |
HIP 18577 |
4.11 |
| 2026-05-27 12:00 |
03:59:17.99 |
-68:23:16.6 |
HIP 18577 |
4.74 |
| 2026-05-28 00:00 |
03:59:26.48 |
-68:23:17.3 |
HIP 18577 |
5.41 |
| 2026-05-28 12:00 |
03:59:34.97 |
-68:23:18.4 |
HIP 18577 |
6.11 |
| 2026-05-29 00:00 |
03:59:43.45 |
-68:23:19.9 |
HIP 18577 |
6.83 |
| 2026-05-29 12:00 |
03:59:51.92 |
-68:23:21.7 |
HIP 18577 |
7.57 |
| 2026-05-30 00:00 |
04:00:00.39 |
-68:23:23.9 |
HIP 18577 |
8.31 |
| 2026-05-30 12:00 |
04:00:08.85 |
-68:23:26.4 |
HIP 18577 |
9.06 |
| 2026-05-31 00:00 |
04:00:17.30 |
-68:23:29.4 |
HIP 18577 |
9.82 |
| 2026-05-31 12:00 |
04:00:25.74 |
-68:23:32.7 |
HIP 18577 |
10.58 |
| 2026-06-01 00:00 |
04:00:34.18 |
-68:23:36.3 |
HIP 18577 |
11.35 |
| 2026-06-01 12:00 |
04:00:42.60 |
-68:23:40.4 |
HIP 18577 |
12.11 |
| 2026-06-02 00:00 |
04:00:51.02 |
-68:23:44.8 |
HIP 18577 |
12.88 |