메타데이터
| 항목 |
값 |
| Designation |
C/1959 Q2 (Alcock) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1959-09-15T21:07:08.423040Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:14Z |
| Obs used |
14 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1959-09-04.0000000 |
| e |
1.00043121 |
| q (au) |
0.165808 |
| a (au) |
-384.520510 |
| i (deg) |
108.035726 |
| Ω (om, deg) |
225.841022 |
| ω (w, deg) |
300.535111 |
| M (ma, deg) |
-0.001553 |
밝기
산란 + 전체 선형
$$
M_a = (7.563 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
7.563 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
1.000 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
03:27:33.73 |
+80:35:56.3 |
HIP 15463 |
25.76 |
| 2026-06-01 12:00 |
03:27:40.76 |
+80:36:02.7 |
HIP 15463 |
26.06 |
| 2026-06-02 00:00 |
03:27:47.77 |
+80:36:09.1 |
HIP 15463 |
26.35 |
| 2026-06-02 12:00 |
03:27:54.76 |
+80:36:15.7 |
HIP 15463 |
26.64 |
| 2026-06-03 00:00 |
03:28:01.74 |
+80:36:22.4 |
HIP 15463 |
26.94 |
| 2026-06-03 12:00 |
03:28:08.70 |
+80:36:29.3 |
HIP 15463 |
27.24 |
| 2026-06-04 00:00 |
03:28:15.64 |
+80:36:36.2 |
HIP 15463 |
27.53 |
| 2026-06-04 12:00 |
03:28:22.57 |
+80:36:43.3 |
HIP 15463 |
27.83 |
| 2026-06-05 00:00 |
03:28:29.48 |
+80:36:50.4 |
HIP 15463 |
28.13 |
| 2026-06-05 12:00 |
03:28:36.37 |
+80:36:57.7 |
HIP 15463 |
28.43 |
| 2026-06-06 00:00 |
03:28:43.25 |
+80:37:05.1 |
HIP 15463 |
28.73 |
| 2026-06-06 12:00 |
03:28:50.10 |
+80:37:12.7 |
HIP 15463 |
29.03 |
| 2026-06-07 00:00 |
03:28:56.94 |
+80:37:20.3 |
HIP 15463 |
29.33 |
| 2026-06-07 12:00 |
03:29:03.76 |
+80:37:28.0 |
HIP 15463 |
29.63 |
| 2026-06-08 00:00 |
03:29:10.56 |
+80:37:35.9 |
HIP 17169 |
29.71 |
| 2026-06-08 12:00 |
03:29:17.34 |
+80:37:43.9 |
HIP 17169 |
29.48 |
| 2026-06-09 00:00 |
03:29:24.09 |
+80:37:51.9 |
HIP 17169 |
29.25 |
| 2026-06-09 12:00 |
03:29:30.83 |
+80:38:00.1 |
HIP 17169 |
29.03 |
| 2026-06-10 00:00 |
03:29:37.54 |
+80:38:08.4 |
HIP 17169 |
28.82 |
| 2026-06-10 12:00 |
03:29:44.24 |
+80:38:16.9 |
HIP 17169 |
28.60 |
| 2026-06-11 00:00 |
03:29:50.91 |
+80:38:25.4 |
HIP 17169 |
28.39 |
| 2026-06-11 12:00 |
03:29:57.55 |
+80:38:34.0 |
HIP 17169 |
28.18 |
| 2026-06-12 00:00 |
03:30:04.18 |
+80:38:42.8 |
HIP 17169 |
27.98 |
| 2026-06-12 12:00 |
03:30:10.78 |
+80:38:51.6 |
HIP 17169 |
27.78 |
| 2026-06-13 00:00 |
03:30:17.36 |
+80:39:00.6 |
HIP 17169 |
27.58 |
| 2026-06-13 12:00 |
03:30:23.91 |
+80:39:09.7 |
HIP 17169 |
27.39 |
| 2026-06-14 00:00 |
03:30:30.44 |
+80:39:18.8 |
HIP 17169 |
27.20 |
| 2026-06-14 12:00 |
03:30:36.94 |
+80:39:28.1 |
HIP 17169 |
27.01 |
| 2026-06-15 00:00 |
03:30:43.41 |
+80:39:37.5 |
HIP 17169 |
26.83 |
| 2026-06-15 12:00 |
03:30:49.86 |
+80:39:47.0 |
HIP 17169 |
26.66 |
| 2026-06-16 00:00 |
03:30:56.28 |
+80:39:56.6 |
HIP 17169 |
26.48 |
| 2026-06-16 12:00 |
03:31:02.68 |
+80:40:06.3 |
HIP 17169 |
26.32 |
| 2026-06-17 00:00 |
03:31:09.05 |
+80:40:16.1 |
HIP 17169 |
26.15 |
| 2026-06-17 12:00 |
03:31:15.38 |
+80:40:26.0 |
HIP 17169 |
25.99 |
| 2026-06-18 00:00 |
03:31:21.69 |
+80:40:36.0 |
HIP 17169 |
25.84 |
| 2026-06-18 12:00 |
03:31:27.98 |
+80:40:46.2 |
HIP 17169 |
25.69 |
| 2026-06-19 00:00 |
03:31:34.23 |
+80:40:56.4 |
HIP 17169 |
25.54 |
| 2026-06-19 12:00 |
03:31:40.45 |
+80:41:06.7 |
HIP 17169 |
25.40 |
| 2026-06-20 00:00 |
03:31:46.64 |
+80:41:17.1 |
HIP 17169 |
25.27 |
| 2026-06-20 12:00 |
03:31:52.80 |
+80:41:27.6 |
HIP 17169 |
25.13 |
| 2026-06-21 00:00 |
03:31:58.93 |
+80:41:38.2 |
HIP 17169 |
25.01 |
| 2026-06-21 12:00 |
03:32:05.03 |
+80:41:48.9 |
HIP 17169 |
24.89 |
| 2026-06-22 00:00 |
03:32:11.10 |
+80:41:59.7 |
HIP 17169 |
24.77 |