메타데이터
| 항목 |
값 |
| Designation |
C/2012 T5 (Bressi) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2013-02-24T01:24:11.816640Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:24Z |
| Obs used |
661 |
| NEO |
- |
| M1 |
15.300 |
| K1 |
4.750 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2012-11-22.0000000 |
| e |
1.00043352 |
| q (au) |
0.322826 |
| a (au) |
-744.660040 |
| i (deg) |
72.098415 |
| Ω (om, deg) |
230.594454 |
| ω (w, deg) |
318.094191 |
| M (ma, deg) |
-0.004562 |
밝기
산란 + 전체 선형
$$
M_a = (14.819 + 4.103\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.819 |
| n |
4.103 |
| gf |
0.997 |
| gb |
-0.787 |
| k |
0.971 |
| δ90 |
9.997 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2012-10-14 |
2012-11-06 |
-18.5544 |
+6.497 |
| 2012-11-06 |
2013-01-07 |
+0.1230 |
+0.205 |
| 2013-01-07 |
2013-02-10 |
+7.5691 |
-0.903 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
23:49:03.01 |
+56:50:56.6 |
HIP 117466 |
7.31 |
| 2026-09-20 12:00 |
23:48:56.85 |
+56:50:43.1 |
HIP 117466 |
7.16 |
| 2026-09-21 00:00 |
23:48:50.69 |
+56:50:29.1 |
HIP 117466 |
7.12 |
| 2026-09-21 12:00 |
23:48:44.53 |
+56:50:14.7 |
HIP 117466 |
7.18 |
| 2026-09-22 00:00 |
23:48:38.37 |
+56:49:59.8 |
HIP 117466 |
7.33 |
| 2026-09-22 12:00 |
23:48:32.21 |
+56:49:44.6 |
HIP 117466 |
7.58 |
| 2026-09-23 00:00 |
23:48:26.06 |
+56:49:28.9 |
HIP 117466 |
7.92 |
| 2026-09-23 12:00 |
23:48:19.91 |
+56:49:12.7 |
HIP 117466 |
8.33 |
| 2026-09-24 00:00 |
23:48:13.77 |
+56:48:56.2 |
HIP 117466 |
8.80 |
| 2026-09-24 12:00 |
23:48:07.63 |
+56:48:39.2 |
HIP 117466 |
9.33 |
| 2026-09-25 00:00 |
23:48:01.50 |
+56:48:21.9 |
HIP 117466 |
9.91 |
| 2026-09-25 12:00 |
23:47:55.38 |
+56:48:04.1 |
HIP 117466 |
10.53 |
| 2026-09-26 00:00 |
23:47:49.26 |
+56:47:45.9 |
HIP 117466 |
11.18 |
| 2026-09-26 12:00 |
23:47:43.15 |
+56:47:27.2 |
HIP 117466 |
11.86 |
| 2026-09-27 00:00 |
23:47:37.04 |
+56:47:08.2 |
HIP 117466 |
12.56 |
| 2026-09-27 12:00 |
23:47:30.95 |
+56:46:48.7 |
HIP 117466 |
13.29 |
| 2026-09-28 00:00 |
23:47:24.86 |
+56:46:28.8 |
HIP 117466 |
14.03 |
| 2026-09-28 12:00 |
23:47:18.78 |
+56:46:08.6 |
HIP 117466 |
14.79 |
| 2026-09-29 00:00 |
23:47:12.71 |
+56:45:47.9 |
HIP 117466 |
15.56 |
| 2026-09-29 12:00 |
23:47:06.66 |
+56:45:26.8 |
HIP 117466 |
16.34 |
| 2026-09-30 00:00 |
23:47:00.61 |
+56:45:05.2 |
HIP 117466 |
17.13 |
| 2026-09-30 12:00 |
23:46:54.57 |
+56:44:43.3 |
HIP 117466 |
17.93 |
| 2026-10-01 00:00 |
23:46:48.55 |
+56:44:21.0 |
HIP 117466 |
18.74 |
| 2026-10-01 12:00 |
23:46:42.54 |
+56:43:58.3 |
HIP 117466 |
19.55 |
| 2026-10-02 00:00 |
23:46:36.54 |
+56:43:35.1 |
HIP 117466 |
20.38 |
| 2026-10-02 12:00 |
23:46:30.55 |
+56:43:11.6 |
HIP 117466 |
21.20 |
| 2026-10-03 00:00 |
23:46:24.58 |
+56:42:47.7 |
HIP 117466 |
22.04 |
| 2026-10-03 12:00 |
23:46:18.62 |
+56:42:23.3 |
HIP 117466 |
22.87 |
| 2026-10-04 00:00 |
23:46:12.68 |
+56:41:58.6 |
HIP 117466 |
23.72 |
| 2026-10-04 12:00 |
23:46:06.75 |
+56:41:33.5 |
HIP 117466 |
24.56 |
| 2026-10-05 00:00 |
23:46:00.84 |
+56:41:08.0 |
HIP 117466 |
25.41 |
| 2026-10-05 12:00 |
23:45:54.94 |
+56:40:42.1 |
HIP 117466 |
26.26 |
| 2026-10-06 00:00 |
23:45:49.07 |
+56:40:15.8 |
HIP 117466 |
27.12 |
| 2026-10-06 12:00 |
23:45:43.21 |
+56:39:49.1 |
HIP 116990 |
27.38 |
| 2026-10-07 00:00 |
23:45:37.36 |
+56:39:22.0 |
HIP 116990 |
26.46 |
| 2026-10-07 12:00 |
23:45:31.54 |
+56:38:54.5 |
HIP 116990 |
25.55 |
| 2026-10-08 00:00 |
23:45:25.73 |
+56:38:26.7 |
HIP 116990 |
24.63 |
| 2026-10-08 12:00 |
23:45:19.95 |
+56:37:58.5 |
HIP 116990 |
23.71 |
| 2026-10-09 00:00 |
23:45:14.19 |
+56:37:29.9 |
HIP 116990 |
22.79 |
| 2026-10-09 12:00 |
23:45:08.44 |
+56:37:00.9 |
HIP 116990 |
21.87 |
| 2026-10-10 00:00 |
23:45:02.72 |
+56:36:31.6 |
HIP 116990 |
20.95 |
| 2026-10-10 12:00 |
23:44:57.02 |
+56:36:01.8 |
HIP 116990 |
20.03 |
| 2026-10-11 00:00 |
23:44:51.34 |
+56:35:31.8 |
HIP 116990 |
19.11 |