C/2014 F2 (Tenagra)
메타데이터
| 항목 |
값 |
| Designation |
C/2014 F2 (Tenagra) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2015-01-02T07:05:02.428800Z |
| Orbit solution date (soln_date, UTC) |
2022-06-07T21:44:07Z |
| Obs used |
300 |
| NEO |
- |
| M1 |
6.900 |
| K1 |
13.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2014-08-06.0000000 |
| e |
0.97089096 |
| q (au) |
4.314459 |
| a (au) |
148.217132 |
| i (deg) |
119.061202 |
| Ω (om, deg) |
267.449809 |
| ω (w, deg) |
86.041144 |
| M (ma, deg) |
359.918454 |
밝기
산란 + 전체 선형
$$
M_a = (6.988 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
6.988 |
| n |
6.000 |
| gf |
0.997 |
| gb |
-0.593 |
| k |
0.800 |
| δ90 |
9.999 |
| 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 |
| 2013-06-19 |
2014-10-02 |
+8.8067 |
-5.851 |
| 2015-02-09 |
2015-12-10 |
-5.8147 |
+3.628 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
04:32:52.40 |
-11:07:25.2 |
HIP 21239 |
21.56 |
| 2026-02-03 12:00 |
04:32:49.89 |
-11:07:00.0 |
HIP 21239 |
21.39 |
| 2026-02-04 00:00 |
04:32:47.42 |
-11:06:34.6 |
HIP 21239 |
21.23 |
| 2026-02-04 12:00 |
04:32:45.00 |
-11:06:09.0 |
HIP 21239 |
21.09 |
| 2026-02-05 00:00 |
04:32:42.62 |
-11:05:43.2 |
HIP 21239 |
20.97 |
| 2026-02-05 12:00 |
04:32:40.28 |
-11:05:17.2 |
HIP 21239 |
20.86 |
| 2026-02-06 00:00 |
04:32:37.98 |
-11:04:50.9 |
HIP 21239 |
20.77 |
| 2026-02-06 12:00 |
04:32:35.73 |
-11:04:24.5 |
HIP 21239 |
20.69 |
| 2026-02-07 00:00 |
04:32:33.52 |
-11:03:57.9 |
HIP 21239 |
20.63 |
| 2026-02-07 12:00 |
04:32:31.35 |
-11:03:31.0 |
HIP 21239 |
20.59 |
| 2026-02-08 00:00 |
04:32:29.23 |
-11:03:04.0 |
HIP 21239 |
20.56 |
| 2026-02-08 12:00 |
04:32:27.15 |
-11:02:36.8 |
HIP 21239 |
20.54 |
| 2026-02-09 00:00 |
04:32:25.11 |
-11:02:09.4 |
HIP 21239 |
20.53 |
| 2026-02-09 12:00 |
04:32:23.12 |
-11:01:41.9 |
HIP 21239 |
20.54 |
| 2026-02-10 00:00 |
04:32:21.17 |
-11:01:14.1 |
HIP 21239 |
20.56 |
| 2026-02-10 12:00 |
04:32:19.26 |
-11:00:46.2 |
HIP 21239 |
20.59 |
| 2026-02-11 00:00 |
04:32:17.40 |
-11:00:18.1 |
HIP 21239 |
20.64 |
| 2026-02-11 12:00 |
04:32:15.58 |
-10:59:49.9 |
HIP 21239 |
20.69 |
| 2026-02-12 00:00 |
04:32:13.81 |
-10:59:21.4 |
HIP 21239 |
20.75 |
| 2026-02-12 12:00 |
04:32:12.08 |
-10:58:52.8 |
HIP 21239 |
20.82 |
| 2026-02-13 00:00 |
04:32:10.39 |
-10:58:24.1 |
HIP 21239 |
20.90 |
| 2026-02-13 12:00 |
04:32:08.75 |
-10:57:55.2 |
HIP 21239 |
20.99 |
| 2026-02-14 00:00 |
04:32:07.16 |
-10:57:26.1 |
HIP 21239 |
21.09 |
| 2026-02-14 12:00 |
04:32:05.60 |
-10:56:56.9 |
HIP 21239 |
21.19 |
| 2026-02-15 00:00 |
04:32:04.09 |
-10:56:27.6 |
HIP 21239 |
21.30 |
| 2026-02-15 12:00 |
04:32:02.63 |
-10:55:58.1 |
HIP 21239 |
21.42 |
| 2026-02-16 00:00 |
04:32:01.21 |
-10:55:28.4 |
HIP 21239 |
21.54 |
| 2026-02-16 12:00 |
04:31:59.83 |
-10:54:58.6 |
HIP 21239 |
21.67 |
| 2026-02-17 00:00 |
04:31:58.50 |
-10:54:28.7 |
HIP 21239 |
21.80 |
| 2026-02-17 12:00 |
04:31:57.22 |
-10:53:58.7 |
HIP 21239 |
21.94 |
| 2026-02-18 00:00 |
04:31:55.97 |
-10:53:28.5 |
HIP 21239 |
22.08 |
| 2026-02-18 12:00 |
04:31:54.78 |
-10:52:58.2 |
HIP 21239 |
22.22 |
| 2026-02-19 00:00 |
04:31:53.63 |
-10:52:27.8 |
HIP 21239 |
22.37 |
| 2026-02-19 12:00 |
04:31:52.52 |
-10:51:57.3 |
HIP 21239 |
22.52 |
| 2026-02-20 00:00 |
04:31:51.45 |
-10:51:26.6 |
HIP 21239 |
22.67 |
| 2026-02-20 12:00 |
04:31:50.44 |
-10:50:55.9 |
HIP 21239 |
22.83 |
| 2026-02-21 00:00 |
04:31:49.46 |
-10:50:25.0 |
HIP 21239 |
22.98 |
| 2026-02-21 12:00 |
04:31:48.53 |
-10:49:54.0 |
HIP 21239 |
23.14 |
| 2026-02-22 00:00 |
04:31:47.65 |
-10:49:23.0 |
HIP 21239 |
23.30 |
| 2026-02-22 12:00 |
04:31:46.81 |
-10:48:51.8 |
HIP 21239 |
23.46 |
| 2026-02-23 00:00 |
04:31:46.01 |
-10:48:20.6 |
HIP 21239 |
23.62 |
| 2026-02-23 12:00 |
04:31:45.26 |
-10:47:49.2 |
HIP 21239 |
23.79 |
| 2026-02-24 00:00 |
04:31:44.55 |
-10:47:17.8 |
HIP 21239 |
23.95 |