메타데이터
| 항목 |
값 |
| Designation |
C/1931 P1 (Ryves) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1931-08-25T21:54:00Z |
| Orbit solution date (soln_date, UTC) |
- |
| Obs used |
25 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1931-08-07.0000000 |
| e |
0.99932600 |
| q (au) |
0.074924 |
| a (au) |
111.163205 |
| i (deg) |
169.288100 |
| Ω (om, deg) |
102.277600 |
| ω (w, deg) |
168.145500 |
| M (ma, deg) |
-0.015904 |
밝기
산란 + 전체 선형
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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) |
| 2026-03-26 00:00 |
07:48:54.47 |
+18:28:18.2 |
HIP 38092 |
11.07 |
| 2026-03-26 12:00 |
07:48:54.04 |
+18:28:20.1 |
HIP 38092 |
11.03 |
| 2026-03-27 00:00 |
07:48:53.62 |
+18:28:21.9 |
HIP 38092 |
10.98 |
| 2026-03-27 12:00 |
07:48:53.22 |
+18:28:23.7 |
HIP 38092 |
10.94 |
| 2026-03-28 00:00 |
07:48:52.82 |
+18:28:25.5 |
HIP 38092 |
10.90 |
| 2026-03-28 12:00 |
07:48:52.43 |
+18:28:27.3 |
HIP 38092 |
10.87 |
| 2026-03-29 00:00 |
07:48:52.05 |
+18:28:29.0 |
HIP 38092 |
10.83 |
| 2026-03-29 12:00 |
07:48:51.69 |
+18:28:30.7 |
HIP 38092 |
10.80 |
| 2026-03-30 00:00 |
07:48:51.33 |
+18:28:32.4 |
HIP 38092 |
10.76 |
| 2026-03-30 12:00 |
07:48:50.98 |
+18:28:34.1 |
HIP 38092 |
10.73 |
| 2026-03-31 00:00 |
07:48:50.64 |
+18:28:35.8 |
HIP 38092 |
10.70 |
| 2026-03-31 12:00 |
07:48:50.31 |
+18:28:37.4 |
HIP 38092 |
10.68 |
| 2026-04-01 00:00 |
07:48:49.99 |
+18:28:39.0 |
HIP 38092 |
10.65 |
| 2026-04-01 12:00 |
07:48:49.68 |
+18:28:40.6 |
HIP 38092 |
10.63 |
| 2026-04-02 00:00 |
07:48:49.38 |
+18:28:42.1 |
HIP 38092 |
10.61 |
| 2026-04-02 12:00 |
07:48:49.09 |
+18:28:43.6 |
HIP 38092 |
10.59 |
| 2026-04-03 00:00 |
07:48:48.82 |
+18:28:45.1 |
HIP 38092 |
10.57 |
| 2026-04-03 12:00 |
07:48:48.55 |
+18:28:46.6 |
HIP 38092 |
10.55 |
| 2026-04-04 00:00 |
07:48:48.29 |
+18:28:48.1 |
HIP 38092 |
10.53 |
| 2026-04-04 12:00 |
07:48:48.04 |
+18:28:49.5 |
HIP 38092 |
10.52 |
| 2026-04-05 00:00 |
07:48:47.80 |
+18:28:50.9 |
HIP 38092 |
10.50 |
| 2026-04-05 12:00 |
07:48:47.57 |
+18:28:52.3 |
HIP 38092 |
10.49 |
| 2026-04-06 00:00 |
07:48:47.35 |
+18:28:53.6 |
HIP 38092 |
10.48 |
| 2026-04-06 12:00 |
07:48:47.14 |
+18:28:54.9 |
HIP 38092 |
10.47 |
| 2026-04-07 00:00 |
07:48:46.94 |
+18:28:56.2 |
HIP 38092 |
10.46 |
| 2026-04-07 12:00 |
07:48:46.75 |
+18:28:57.5 |
HIP 38092 |
10.46 |
| 2026-04-08 00:00 |
07:48:46.57 |
+18:28:58.8 |
HIP 38092 |
10.45 |
| 2026-04-08 12:00 |
07:48:46.40 |
+18:29:00.0 |
HIP 38092 |
10.45 |
| 2026-04-09 00:00 |
07:48:46.24 |
+18:29:01.2 |
HIP 38092 |
10.44 |
| 2026-04-09 12:00 |
07:48:46.09 |
+18:29:02.4 |
HIP 38092 |
10.44 |
| 2026-04-10 00:00 |
07:48:45.95 |
+18:29:03.5 |
HIP 38092 |
10.44 |
| 2026-04-10 12:00 |
07:48:45.82 |
+18:29:04.6 |
HIP 38092 |
10.44 |
| 2026-04-11 00:00 |
07:48:45.70 |
+18:29:05.7 |
HIP 38092 |
10.44 |
| 2026-04-11 12:00 |
07:48:45.59 |
+18:29:06.8 |
HIP 38092 |
10.44 |
| 2026-04-12 00:00 |
07:48:45.49 |
+18:29:07.8 |
HIP 38092 |
10.44 |
| 2026-04-12 12:00 |
07:48:45.40 |
+18:29:08.8 |
HIP 38092 |
10.45 |
| 2026-04-13 00:00 |
07:48:45.33 |
+18:29:09.8 |
HIP 38092 |
10.45 |
| 2026-04-13 12:00 |
07:48:45.26 |
+18:29:10.8 |
HIP 38092 |
10.46 |
| 2026-04-14 00:00 |
07:48:45.20 |
+18:29:11.7 |
HIP 38092 |
10.46 |
| 2026-04-14 12:00 |
07:48:45.15 |
+18:29:12.6 |
HIP 38092 |
10.47 |
| 2026-04-15 00:00 |
07:48:45.11 |
+18:29:13.5 |
HIP 38092 |
10.48 |
| 2026-04-15 12:00 |
07:48:45.08 |
+18:29:14.4 |
HIP 38092 |
10.49 |
| 2026-04-16 00:00 |
07:48:45.07 |
+18:29:15.2 |
HIP 38092 |
10.50 |