메타데이터
| 항목 |
값 |
| Designation |
C/2014 C2 (STEREO) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2014-02-18T05:53:19.752000Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:48Z |
| Obs used |
297 |
| NEO |
- |
| M1 |
14.400 |
| K1 |
9.300 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2014-03-08.0000000 |
| e |
1.00000000 |
| q (au) |
0.512340 |
| a (au) |
- |
| i (deg) |
135.502163 |
| Ω (om, deg) |
283.347106 |
| ω (w, deg) |
56.075501 |
| M (ma, deg) |
- |
밝기
산란 + 전체 선형
$$
M_a = (15.851 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.851 |
| n |
6.000 |
| gf |
0.800 |
| gb |
-1.000 |
| k |
0.800 |
| δ90 |
10.000 |
| 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 |
| 2014-01-31 |
2014-02-16 |
-109.8474 |
-24.213 |
| 2014-02-19 |
2014-04-21 |
-4.4994 |
+2.124 |
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 |
05:02:00.02 |
-04:57:57.1 |
HIP 23535 |
26.73 |
| 2026-09-20 12:00 |
05:01:59.12 |
-04:58:26.6 |
HIP 23535 |
26.75 |
| 2026-09-21 00:00 |
05:01:58.18 |
-04:58:56.2 |
HIP 23535 |
26.78 |
| 2026-09-21 12:00 |
05:01:57.21 |
-04:59:25.8 |
HIP 23535 |
26.83 |
| 2026-09-22 00:00 |
05:01:56.21 |
-04:59:55.4 |
HIP 23535 |
26.89 |
| 2026-09-22 12:00 |
05:01:55.18 |
-05:00:25.0 |
HIP 23535 |
26.98 |
| 2026-09-23 00:00 |
05:01:54.11 |
-05:00:54.6 |
HIP 23535 |
27.09 |
| 2026-09-23 12:00 |
05:01:53.01 |
-05:01:24.2 |
HIP 23535 |
27.21 |
| 2026-09-24 00:00 |
05:01:51.87 |
-05:01:53.8 |
HIP 23535 |
27.36 |
| 2026-09-24 12:00 |
05:01:50.71 |
-05:02:23.4 |
HIP 23535 |
27.52 |
| 2026-09-25 00:00 |
05:01:49.51 |
-05:02:53.0 |
HIP 23422 |
27.32 |
| 2026-09-25 12:00 |
05:01:48.27 |
-05:03:22.5 |
HIP 23422 |
26.87 |
| 2026-09-26 00:00 |
05:01:47.00 |
-05:03:52.1 |
HIP 23422 |
26.42 |
| 2026-09-26 12:00 |
05:01:45.70 |
-05:04:21.7 |
HIP 23422 |
25.98 |
| 2026-09-27 00:00 |
05:01:44.37 |
-05:04:51.2 |
HIP 23422 |
25.54 |
| 2026-09-27 12:00 |
05:01:43.00 |
-05:05:20.7 |
HIP 23422 |
25.11 |
| 2026-09-28 00:00 |
05:01:41.60 |
-05:05:50.2 |
HIP 23422 |
24.70 |
| 2026-09-28 12:00 |
05:01:40.17 |
-05:06:19.7 |
HIP 23422 |
24.29 |
| 2026-09-29 00:00 |
05:01:38.71 |
-05:06:49.2 |
HIP 23422 |
23.89 |
| 2026-09-29 12:00 |
05:01:37.21 |
-05:07:18.6 |
HIP 23422 |
23.50 |
| 2026-09-30 00:00 |
05:01:35.68 |
-05:07:48.0 |
HIP 23422 |
23.13 |
| 2026-09-30 12:00 |
05:01:34.12 |
-05:08:17.4 |
HIP 23422 |
22.77 |
| 2026-10-01 00:00 |
05:01:32.52 |
-05:08:46.8 |
HIP 23422 |
22.43 |
| 2026-10-01 12:00 |
05:01:30.89 |
-05:09:16.1 |
HIP 23422 |
22.10 |
| 2026-10-02 00:00 |
05:01:29.23 |
-05:09:45.4 |
HIP 23422 |
21.78 |
| 2026-10-02 12:00 |
05:01:27.54 |
-05:10:14.6 |
HIP 23422 |
21.49 |
| 2026-10-03 00:00 |
05:01:25.82 |
-05:10:43.8 |
HIP 23422 |
21.22 |
| 2026-10-03 12:00 |
05:01:24.06 |
-05:11:13.0 |
HIP 23422 |
20.96 |
| 2026-10-04 00:00 |
05:01:22.27 |
-05:11:42.1 |
HIP 23422 |
20.73 |
| 2026-10-04 12:00 |
05:01:20.45 |
-05:12:11.2 |
HIP 23422 |
20.52 |
| 2026-10-05 00:00 |
05:01:18.59 |
-05:12:40.2 |
HIP 23422 |
20.34 |
| 2026-10-05 12:00 |
05:01:16.71 |
-05:13:09.2 |
HIP 23422 |
20.18 |
| 2026-10-06 00:00 |
05:01:14.79 |
-05:13:38.1 |
HIP 23422 |
20.05 |
| 2026-10-06 12:00 |
05:01:12.84 |
-05:14:07.0 |
HIP 23422 |
19.94 |
| 2026-10-07 00:00 |
05:01:10.86 |
-05:14:35.8 |
HIP 23422 |
19.86 |
| 2026-10-07 12:00 |
05:01:08.85 |
-05:15:04.5 |
HIP 23422 |
19.82 |
| 2026-10-08 00:00 |
05:01:06.81 |
-05:15:33.2 |
HIP 23422 |
19.80 |
| 2026-10-08 12:00 |
05:01:04.73 |
-05:16:01.9 |
HIP 23223 |
19.59 |
| 2026-10-09 00:00 |
05:01:02.62 |
-05:16:30.4 |
HIP 23223 |
19.27 |
| 2026-10-09 12:00 |
05:01:00.49 |
-05:16:58.9 |
HIP 23223 |
18.97 |
| 2026-10-10 00:00 |
05:00:58.32 |
-05:17:27.3 |
HIP 23223 |
18.68 |
| 2026-10-10 12:00 |
05:00:56.12 |
-05:17:55.7 |
HIP 23223 |
18.41 |
| 2026-10-11 00:00 |
05:00:53.89 |
-05:18:23.9 |
HIP 23223 |
18.15 |