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
$$
M_a = (6.987 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
6.987 |
| n |
6.000 |
| gf |
0.988 |
| gb |
-0.593 |
| k |
0.800 |
| δ90 |
9.775 |
| 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 |
-5.8148 |
+3.628 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
04:48:37.54 |
-11:21:43.0 |
HIP 22326 |
23.44 |
| 2026-09-20 12:00 |
04:48:36.04 |
-11:22:31.3 |
HIP 22326 |
22.62 |
| 2026-09-21 00:00 |
04:48:34.50 |
-11:23:19.6 |
HIP 22326 |
21.81 |
| 2026-09-21 12:00 |
04:48:32.92 |
-11:24:07.9 |
HIP 22326 |
21.00 |
| 2026-09-22 00:00 |
04:48:31.30 |
-11:24:56.2 |
HIP 22326 |
20.20 |
| 2026-09-22 12:00 |
04:48:29.63 |
-11:25:44.5 |
HIP 22326 |
19.41 |
| 2026-09-23 00:00 |
04:48:27.93 |
-11:26:32.8 |
HIP 22326 |
18.63 |
| 2026-09-23 12:00 |
04:48:26.18 |
-11:27:21.1 |
HIP 22326 |
17.87 |
| 2026-09-24 00:00 |
04:48:24.40 |
-11:28:09.3 |
HIP 22326 |
17.12 |
| 2026-09-24 12:00 |
04:48:22.57 |
-11:28:57.5 |
HIP 22326 |
16.39 |
| 2026-09-25 00:00 |
04:48:20.70 |
-11:29:45.7 |
HIP 22326 |
15.68 |
| 2026-09-25 12:00 |
04:48:18.79 |
-11:30:33.8 |
HIP 22326 |
15.00 |
| 2026-09-26 00:00 |
04:48:16.85 |
-11:31:21.9 |
HIP 22326 |
14.35 |
| 2026-09-26 12:00 |
04:48:14.86 |
-11:32:10.0 |
HIP 22326 |
13.73 |
| 2026-09-27 00:00 |
04:48:12.83 |
-11:32:58.0 |
HIP 22326 |
13.16 |
| 2026-09-27 12:00 |
04:48:10.76 |
-11:33:46.0 |
HIP 22326 |
12.64 |
| 2026-09-28 00:00 |
04:48:08.65 |
-11:34:34.0 |
HIP 22326 |
12.17 |
| 2026-09-28 12:00 |
04:48:06.50 |
-11:35:21.9 |
HIP 22326 |
11.77 |
| 2026-09-29 00:00 |
04:48:04.31 |
-11:36:09.7 |
HIP 22326 |
11.44 |
| 2026-09-29 12:00 |
04:48:02.09 |
-11:36:57.5 |
HIP 22326 |
11.19 |
| 2026-09-30 00:00 |
04:47:59.82 |
-11:37:45.2 |
HIP 22326 |
11.03 |
| 2026-09-30 12:00 |
04:47:57.51 |
-11:38:32.9 |
HIP 22326 |
10.96 |
| 2026-10-01 00:00 |
04:47:55.16 |
-11:39:20.5 |
HIP 22326 |
10.99 |
| 2026-10-01 12:00 |
04:47:52.78 |
-11:40:08.1 |
HIP 22326 |
11.11 |
| 2026-10-02 00:00 |
04:47:50.35 |
-11:40:55.5 |
HIP 22326 |
11.33 |
| 2026-10-02 12:00 |
04:47:47.88 |
-11:41:42.9 |
HIP 22326 |
11.63 |
| 2026-10-03 00:00 |
04:47:45.38 |
-11:42:30.2 |
HIP 22326 |
12.02 |
| 2026-10-03 12:00 |
04:47:42.84 |
-11:43:17.5 |
HIP 22326 |
12.49 |
| 2026-10-04 00:00 |
04:47:40.26 |
-11:44:04.6 |
HIP 22326 |
13.03 |
| 2026-10-04 12:00 |
04:47:37.63 |
-11:44:51.7 |
HIP 22326 |
13.63 |
| 2026-10-05 00:00 |
04:47:34.97 |
-11:45:38.7 |
HIP 22326 |
14.29 |
| 2026-10-05 12:00 |
04:47:32.28 |
-11:46:25.6 |
HIP 22326 |
14.99 |
| 2026-10-06 00:00 |
04:47:29.54 |
-11:47:12.3 |
HIP 22326 |
15.74 |
| 2026-10-06 12:00 |
04:47:26.76 |
-11:47:59.0 |
HIP 22326 |
16.53 |
| 2026-10-07 00:00 |
04:47:23.95 |
-11:48:45.6 |
HIP 22326 |
17.36 |
| 2026-10-07 12:00 |
04:47:21.10 |
-11:49:32.1 |
HIP 22326 |
18.21 |
| 2026-10-08 00:00 |
04:47:18.21 |
-11:50:18.4 |
HIP 22326 |
19.09 |
| 2026-10-08 12:00 |
04:47:15.28 |
-11:51:04.7 |
HIP 22326 |
20.00 |
| 2026-10-09 00:00 |
04:47:12.32 |
-11:51:50.8 |
HIP 22140 |
20.53 |
| 2026-10-09 12:00 |
04:47:09.32 |
-11:52:36.8 |
HIP 22140 |
19.63 |
| 2026-10-10 00:00 |
04:47:06.28 |
-11:53:22.7 |
HIP 22140 |
18.75 |
| 2026-10-10 12:00 |
04:47:03.20 |
-11:54:08.4 |
HIP 22140 |
17.87 |
| 2026-10-11 00:00 |
04:47:00.09 |
-11:54:54.1 |
HIP 22140 |
17.01 |