C/2019 T3 (ATLAS)
メタデータ
| 項目 |
値 |
| Designation |
C/2019 T3 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2021-03-02T19:33:37.736640Z |
| Orbit solution date (soln_date, UTC) |
2023-10-29T03:12:36Z |
| Obs used |
1828 |
| NEO |
- |
| M1 |
6.200 |
| K1 |
9.250 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2019-10-06T14:39:22.665600Z |
| Discovery magnitude (MPC) |
18.93 o |
| Discovery observatory (MPC) |
T08 · ATLAS-MLO, Mauna Loa |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2021-06-16.0000000 |
| e |
0.99811652 |
| q (au) |
5.946570 |
| a (au) |
3157.226390 |
| i (deg) |
121.862229 |
| Ω (om, deg) |
139.520850 |
| ω (w, deg) |
112.287584 |
| M (ma, deg) |
0.000584 |
等級
散乱 + 全体線形
$$
M_a = (0.980 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
0.980 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.905 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2019-01-17 |
2021-02-11 |
+8.5092 |
-6.642 |
| 2021-04-20 |
2022-07-29 |
-1.2668 |
+0.601 |
| 2022-07-29 |
2023-08-18 |
+15.8970 |
-13.656 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
20:56:07.09 |
-39:20:16.1 |
HIP 103504 |
29.78 |
| 2026-02-03 12:00 |
20:56:16.97 |
-39:20:18.2 |
HIP 103504 |
28.25 |
| 2026-02-04 00:00 |
20:56:26.85 |
-39:20:20.7 |
HIP 103504 |
26.78 |
| 2026-02-04 12:00 |
20:56:36.72 |
-39:20:23.6 |
HIP 103504 |
25.36 |
| 2026-02-05 00:00 |
20:56:46.58 |
-39:20:26.9 |
HIP 103504 |
24.03 |
| 2026-02-05 12:00 |
20:56:56.44 |
-39:20:30.6 |
HIP 103504 |
22.78 |
| 2026-02-06 00:00 |
20:57:06.29 |
-39:20:34.6 |
HIP 103504 |
21.63 |
| 2026-02-06 12:00 |
20:57:16.13 |
-39:20:39.1 |
HIP 103504 |
20.61 |
| 2026-02-07 00:00 |
20:57:25.96 |
-39:20:43.9 |
HIP 103504 |
19.72 |
| 2026-02-07 12:00 |
20:57:35.78 |
-39:20:49.2 |
HIP 103504 |
18.99 |
| 2026-02-08 00:00 |
20:57:45.59 |
-39:20:54.9 |
HIP 103504 |
18.44 |
| 2026-02-08 12:00 |
20:57:55.39 |
-39:21:00.9 |
HIP 103504 |
18.08 |
| 2026-02-09 00:00 |
20:58:05.18 |
-39:21:07.4 |
HIP 103504 |
17.92 |
| 2026-02-09 12:00 |
20:58:14.95 |
-39:21:14.3 |
HIP 103504 |
17.96 |
| 2026-02-10 00:00 |
20:58:24.71 |
-39:21:21.6 |
HIP 103504 |
18.22 |
| 2026-02-10 12:00 |
20:58:34.46 |
-39:21:29.3 |
HIP 103504 |
18.66 |
| 2026-02-11 00:00 |
20:58:44.20 |
-39:21:37.4 |
HIP 103504 |
19.29 |
| 2026-02-11 12:00 |
20:58:53.91 |
-39:21:46.0 |
HIP 103504 |
20.09 |
| 2026-02-12 00:00 |
20:59:03.62 |
-39:21:54.9 |
HIP 103504 |
21.03 |
| 2026-02-12 12:00 |
20:59:13.30 |
-39:22:04.3 |
HIP 103504 |
22.09 |
| 2026-02-13 00:00 |
20:59:22.97 |
-39:22:14.1 |
HIP 103504 |
23.27 |
| 2026-02-13 12:00 |
20:59:32.62 |
-39:22:24.4 |
HIP 103504 |
24.53 |
| 2026-02-14 00:00 |
20:59:42.26 |
-39:22:35.1 |
HIP 103504 |
25.87 |
| 2026-02-14 12:00 |
20:59:51.87 |
-39:22:46.2 |
HIP 103504 |
27.28 |
| 2026-02-15 00:00 |
21:00:01.47 |
-39:22:57.7 |
HIP 103504 |
28.74 |
| 2026-02-15 12:00 |
21:00:11.04 |
-39:23:09.7 |
HIP 103857 |
29.53 |
| 2026-02-16 00:00 |
21:00:20.60 |
-39:23:22.2 |
HIP 103857 |
27.78 |
| 2026-02-16 12:00 |
21:00:30.13 |
-39:23:35.0 |
HIP 103857 |
26.04 |
| 2026-02-17 00:00 |
21:00:39.64 |
-39:23:48.4 |
HIP 103857 |
24.33 |
| 2026-02-17 12:00 |
21:00:49.13 |
-39:24:02.1 |
HIP 103857 |
22.65 |
| 2026-02-18 00:00 |
21:00:58.59 |
-39:24:16.3 |
HIP 103857 |
21.01 |
| 2026-02-18 12:00 |
21:01:08.03 |
-39:24:31.0 |
HIP 103857 |
19.41 |
| 2026-02-19 00:00 |
21:01:17.44 |
-39:24:46.1 |
HIP 103857 |
17.86 |
| 2026-02-19 12:00 |
21:01:26.83 |
-39:25:01.7 |
HIP 103857 |
16.38 |
| 2026-02-20 00:00 |
21:01:36.19 |
-39:25:17.8 |
HIP 103857 |
14.99 |
| 2026-02-20 12:00 |
21:01:45.53 |
-39:25:34.3 |
HIP 103857 |
13.71 |
| 2026-02-21 00:00 |
21:01:54.84 |
-39:25:51.2 |
HIP 103857 |
12.58 |
| 2026-02-21 12:00 |
21:02:04.12 |
-39:26:08.7 |
HIP 103857 |
11.63 |
| 2026-02-22 00:00 |
21:02:13.37 |
-39:26:26.6 |
HIP 103857 |
10.91 |
| 2026-02-22 12:00 |
21:02:22.59 |
-39:26:44.9 |
HIP 103857 |
10.47 |
| 2026-02-23 00:00 |
21:02:31.78 |
-39:27:03.8 |
HIP 103857 |
10.35 |
| 2026-02-23 12:00 |
21:02:40.94 |
-39:27:23.1 |
HIP 103857 |
10.54 |
| 2026-02-24 00:00 |
21:02:50.07 |
-39:27:42.8 |
HIP 103857 |
11.03 |