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 |
0.996 |
| 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 |
-18.5543 |
+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) |
| 2026-03-26 00:00 |
23:49:40.63 |
+53:55:35.4 |
HIP 117456 |
7.57 |
| 2026-03-26 12:00 |
23:49:46.58 |
+53:55:53.7 |
HIP 117456 |
8.47 |
| 2026-03-27 00:00 |
23:49:52.51 |
+53:56:12.2 |
HIP 117456 |
9.38 |
| 2026-03-27 12:00 |
23:49:58.44 |
+53:56:31.1 |
HIP 117456 |
10.29 |
| 2026-03-28 00:00 |
23:50:04.36 |
+53:56:50.4 |
HIP 117456 |
11.21 |
| 2026-03-28 12:00 |
23:50:10.28 |
+53:57:10.0 |
HIP 117626 |
11.02 |
| 2026-03-29 00:00 |
23:50:16.18 |
+53:57:30.0 |
HIP 117626 |
10.09 |
| 2026-03-29 12:00 |
23:50:22.07 |
+53:57:50.3 |
HIP 117626 |
9.16 |
| 2026-03-30 00:00 |
23:50:27.96 |
+53:58:10.9 |
HIP 117626 |
8.23 |
| 2026-03-30 12:00 |
23:50:33.83 |
+53:58:31.9 |
HIP 117626 |
7.30 |
| 2026-03-31 00:00 |
23:50:39.70 |
+53:58:53.2 |
HIP 117626 |
6.37 |
| 2026-03-31 12:00 |
23:50:45.55 |
+53:59:14.9 |
HIP 117626 |
5.43 |
| 2026-04-01 00:00 |
23:50:51.39 |
+53:59:36.9 |
HIP 117626 |
4.50 |
| 2026-04-01 12:00 |
23:50:57.22 |
+53:59:59.2 |
HIP 117626 |
3.57 |
| 2026-04-02 00:00 |
23:51:03.04 |
+54:00:21.9 |
HIP 117626 |
2.63 |
| 2026-04-02 12:00 |
23:51:08.85 |
+54:00:44.8 |
HIP 117626 |
1.70 |
| 2026-04-03 00:00 |
23:51:14.64 |
+54:01:08.2 |
HIP 117626 |
0.78 |
| 2026-04-03 12:00 |
23:51:20.42 |
+54:01:31.8 |
HIP 117626 |
0.28 |
| 2026-04-04 00:00 |
23:51:26.19 |
+54:01:55.8 |
HIP 117626 |
1.14 |
| 2026-04-04 12:00 |
23:51:31.95 |
+54:02:20.1 |
HIP 117626 |
2.07 |
| 2026-04-05 00:00 |
23:51:37.69 |
+54:02:44.7 |
HIP 117626 |
3.00 |
| 2026-04-05 12:00 |
23:51:43.42 |
+54:03:09.6 |
HIP 117626 |
3.94 |
| 2026-04-06 00:00 |
23:51:49.13 |
+54:03:34.9 |
HIP 117626 |
4.88 |
| 2026-04-06 12:00 |
23:51:54.83 |
+54:04:00.5 |
HIP 117626 |
5.82 |
| 2026-04-07 00:00 |
23:52:00.51 |
+54:04:26.4 |
HIP 117626 |
6.76 |
| 2026-04-07 12:00 |
23:52:06.18 |
+54:04:52.6 |
HIP 117626 |
7.70 |
| 2026-04-08 00:00 |
23:52:11.84 |
+54:05:19.1 |
HIP 117626 |
8.64 |
| 2026-04-08 12:00 |
23:52:17.47 |
+54:05:45.9 |
HIP 117626 |
9.57 |
| 2026-04-09 00:00 |
23:52:23.10 |
+54:06:13.1 |
HIP 117733 |
10.21 |
| 2026-04-09 12:00 |
23:52:28.70 |
+54:06:40.5 |
HIP 117733 |
9.60 |
| 2026-04-10 00:00 |
23:52:34.29 |
+54:07:08.3 |
HIP 117733 |
9.03 |
| 2026-04-10 12:00 |
23:52:39.86 |
+54:07:36.3 |
HIP 117733 |
8.53 |
| 2026-04-11 00:00 |
23:52:45.41 |
+54:08:04.7 |
HIP 117733 |
8.10 |
| 2026-04-11 12:00 |
23:52:50.94 |
+54:08:33.3 |
HIP 117733 |
7.76 |
| 2026-04-12 00:00 |
23:52:56.46 |
+54:09:02.3 |
HIP 117733 |
7.51 |
| 2026-04-12 12:00 |
23:53:01.96 |
+54:09:31.5 |
HIP 117733 |
7.37 |
| 2026-04-13 00:00 |
23:53:07.44 |
+54:10:01.1 |
HIP 117733 |
7.34 |
| 2026-04-13 12:00 |
23:53:12.89 |
+54:10:30.9 |
HIP 117733 |
7.43 |
| 2026-04-14 00:00 |
23:53:18.33 |
+54:11:01.1 |
HIP 117733 |
7.62 |
| 2026-04-14 12:00 |
23:53:23.75 |
+54:11:31.5 |
HIP 117733 |
7.92 |
| 2026-04-15 00:00 |
23:53:29.15 |
+54:12:02.2 |
HIP 117733 |
8.31 |
| 2026-04-15 12:00 |
23:53:34.53 |
+54:12:33.2 |
HIP 117733 |
8.78 |
| 2026-04-16 00:00 |
23:53:39.88 |
+54:13:04.4 |
HIP 117733 |
9.31 |