메타데이터
| 항목 |
값 |
| Designation |
C/2014 M2 (Christensen) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2014-07-12T15:05:12.776640Z |
| Orbit solution date (soln_date, UTC) |
2022-06-28T07:55:51Z |
| Obs used |
57 |
| NEO |
- |
| M1 |
6.900 |
| K1 |
11.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2014-07-19.0000000 |
| e |
0.99274520 |
| q (au) |
6.909654 |
| a (au) |
952.425613 |
| i (deg) |
32.418761 |
| Ω (om, deg) |
245.346855 |
| ω (w, deg) |
40.275887 |
| M (ma, deg) |
0.000214 |
밝기
산란 + 전체 선형
$$
M_a = (13.640 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
13.640 |
| n |
2.000 |
| gf |
0.987 |
| gb |
-0.586 |
| k |
0.800 |
| δ90 |
9.139 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
02:43:52.46 |
+28:49:57.4 |
HIP 12847 |
16.86 |
| 2026-07-29 12:00 |
02:43:53.88 |
+28:50:13.3 |
HIP 12847 |
16.53 |
| 2026-07-30 00:00 |
02:43:55.25 |
+28:50:28.9 |
HIP 12847 |
16.22 |
| 2026-07-30 12:00 |
02:43:56.58 |
+28:50:44.5 |
HIP 12847 |
15.91 |
| 2026-07-31 00:00 |
02:43:57.87 |
+28:50:59.9 |
HIP 12847 |
15.62 |
| 2026-07-31 12:00 |
02:43:59.11 |
+28:51:15.1 |
HIP 12847 |
15.35 |
| 2026-08-01 00:00 |
02:44:00.31 |
+28:51:30.2 |
HIP 12847 |
15.08 |
| 2026-08-01 12:00 |
02:44:01.47 |
+28:51:45.1 |
HIP 12847 |
14.83 |
| 2026-08-02 00:00 |
02:44:02.59 |
+28:51:59.8 |
HIP 12847 |
14.59 |
| 2026-08-02 12:00 |
02:44:03.66 |
+28:52:14.4 |
HIP 12847 |
14.37 |
| 2026-08-03 00:00 |
02:44:04.69 |
+28:52:28.9 |
HIP 12847 |
14.16 |
| 2026-08-03 12:00 |
02:44:05.68 |
+28:52:43.1 |
HIP 12847 |
13.97 |
| 2026-08-04 00:00 |
02:44:06.63 |
+28:52:57.3 |
HIP 12847 |
13.78 |
| 2026-08-04 12:00 |
02:44:07.53 |
+28:53:11.2 |
HIP 12847 |
13.62 |
| 2026-08-05 00:00 |
02:44:08.39 |
+28:53:25.0 |
HIP 12847 |
13.46 |
| 2026-08-05 12:00 |
02:44:09.20 |
+28:53:38.6 |
HIP 12847 |
13.32 |
| 2026-08-06 00:00 |
02:44:09.97 |
+28:53:52.1 |
HIP 12847 |
13.20 |
| 2026-08-06 12:00 |
02:44:10.70 |
+28:54:05.3 |
HIP 12847 |
13.08 |
| 2026-08-07 00:00 |
02:44:11.38 |
+28:54:18.5 |
HIP 12847 |
12.98 |
| 2026-08-07 12:00 |
02:44:12.02 |
+28:54:31.4 |
HIP 12847 |
12.90 |
| 2026-08-08 00:00 |
02:44:12.62 |
+28:54:44.2 |
HIP 12847 |
12.82 |
| 2026-08-08 12:00 |
02:44:13.17 |
+28:54:56.8 |
HIP 12847 |
12.76 |
| 2026-08-09 00:00 |
02:44:13.68 |
+28:55:09.2 |
HIP 12847 |
12.71 |
| 2026-08-09 12:00 |
02:44:14.15 |
+28:55:21.4 |
HIP 12847 |
12.68 |
| 2026-08-10 00:00 |
02:44:14.57 |
+28:55:33.5 |
HIP 12847 |
12.66 |
| 2026-08-10 12:00 |
02:44:14.95 |
+28:55:45.3 |
HIP 12847 |
12.64 |
| 2026-08-11 00:00 |
02:44:15.28 |
+28:55:57.0 |
HIP 12847 |
12.65 |
| 2026-08-11 12:00 |
02:44:15.57 |
+28:56:08.6 |
HIP 12847 |
12.66 |
| 2026-08-12 00:00 |
02:44:15.81 |
+28:56:19.9 |
HIP 12847 |
12.68 |
| 2026-08-12 12:00 |
02:44:16.01 |
+28:56:31.0 |
HIP 12847 |
12.71 |
| 2026-08-13 00:00 |
02:44:16.17 |
+28:56:42.0 |
HIP 12847 |
12.76 |
| 2026-08-13 12:00 |
02:44:16.28 |
+28:56:52.8 |
HIP 12847 |
12.81 |
| 2026-08-14 00:00 |
02:44:16.35 |
+28:57:03.3 |
HIP 12847 |
12.87 |
| 2026-08-14 12:00 |
02:44:16.37 |
+28:57:13.7 |
HIP 12847 |
12.94 |
| 2026-08-15 00:00 |
02:44:16.35 |
+28:57:23.9 |
HIP 12847 |
13.02 |
| 2026-08-15 12:00 |
02:44:16.29 |
+28:57:33.9 |
HIP 12847 |
13.11 |
| 2026-08-16 00:00 |
02:44:16.18 |
+28:57:43.8 |
HIP 12847 |
13.21 |
| 2026-08-16 12:00 |
02:44:16.03 |
+28:57:53.4 |
HIP 12847 |
13.32 |
| 2026-08-17 00:00 |
02:44:15.83 |
+28:58:02.8 |
HIP 12847 |
13.43 |
| 2026-08-17 12:00 |
02:44:15.59 |
+28:58:12.0 |
HIP 12847 |
13.56 |
| 2026-08-18 00:00 |
02:44:15.30 |
+28:58:21.1 |
HIP 12847 |
13.69 |
| 2026-08-18 12:00 |
02:44:14.98 |
+28:58:29.9 |
HIP 12847 |
13.82 |
| 2026-08-19 00:00 |
02:44:14.60 |
+28:58:38.5 |
HIP 12847 |
13.97 |