메타데이터
| 항목 |
값 |
| Designation |
C/1927 E1 (Stearns) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1927-03-22T09:38:59.971200Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:02Z |
| Obs used |
17 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1927-04-28.0000000 |
| e |
1.00126512 |
| q (au) |
3.685079 |
| a (au) |
-2912.831167 |
| i (deg) |
87.689543 |
| Ω (om, deg) |
215.661674 |
| ω (w, deg) |
11.068406 |
| M (ma, deg) |
0.000229 |
밝기
산란 + 전체 선형
$$
M_a = (8.109 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
8.109 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.998 |
| δ90 |
9.945 |
| 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 |
01:57:26.57 |
+21:55:18.2 |
HIP 9260 |
22.30 |
| 2026-03-26 12:00 |
01:57:27.49 |
+21:55:21.3 |
HIP 9260 |
22.09 |
| 2026-03-27 00:00 |
01:57:28.41 |
+21:55:24.4 |
HIP 9260 |
21.87 |
| 2026-03-27 12:00 |
01:57:29.34 |
+21:55:27.6 |
HIP 9260 |
21.66 |
| 2026-03-28 00:00 |
01:57:30.27 |
+21:55:30.8 |
HIP 9260 |
21.45 |
| 2026-03-28 12:00 |
01:57:31.20 |
+21:55:34.0 |
HIP 9260 |
21.23 |
| 2026-03-29 00:00 |
01:57:32.14 |
+21:55:37.3 |
HIP 9260 |
21.02 |
| 2026-03-29 12:00 |
01:57:33.08 |
+21:55:40.6 |
HIP 9260 |
20.80 |
| 2026-03-30 00:00 |
01:57:34.02 |
+21:55:44.0 |
HIP 9260 |
20.58 |
| 2026-03-30 12:00 |
01:57:34.97 |
+21:55:47.4 |
HIP 9260 |
20.37 |
| 2026-03-31 00:00 |
01:57:35.92 |
+21:55:50.8 |
HIP 9260 |
20.15 |
| 2026-03-31 12:00 |
01:57:36.88 |
+21:55:54.3 |
HIP 9260 |
19.93 |
| 2026-04-01 00:00 |
01:57:37.83 |
+21:55:57.8 |
HIP 9260 |
19.71 |
| 2026-04-01 12:00 |
01:57:38.79 |
+21:56:01.3 |
HIP 9260 |
19.49 |
| 2026-04-02 00:00 |
01:57:39.76 |
+21:56:04.9 |
HIP 9260 |
19.27 |
| 2026-04-02 12:00 |
01:57:40.72 |
+21:56:08.5 |
HIP 9260 |
19.05 |
| 2026-04-03 00:00 |
01:57:41.69 |
+21:56:12.1 |
HIP 9260 |
18.83 |
| 2026-04-03 12:00 |
01:57:42.66 |
+21:56:15.8 |
HIP 9260 |
18.61 |
| 2026-04-04 00:00 |
01:57:43.63 |
+21:56:19.5 |
HIP 9260 |
18.39 |
| 2026-04-04 12:00 |
01:57:44.61 |
+21:56:23.3 |
HIP 9260 |
18.17 |
| 2026-04-05 00:00 |
01:57:45.59 |
+21:56:27.1 |
HIP 9260 |
17.95 |
| 2026-04-05 12:00 |
01:57:46.57 |
+21:56:30.9 |
HIP 9260 |
17.73 |
| 2026-04-06 00:00 |
01:57:47.56 |
+21:56:34.7 |
HIP 9260 |
17.51 |
| 2026-04-06 12:00 |
01:57:48.54 |
+21:56:38.6 |
HIP 9260 |
17.29 |
| 2026-04-07 00:00 |
01:57:49.53 |
+21:56:42.5 |
HIP 9260 |
17.07 |
| 2026-04-07 12:00 |
01:57:50.52 |
+21:56:46.5 |
HIP 9260 |
16.85 |
| 2026-04-08 00:00 |
01:57:51.52 |
+21:56:50.5 |
HIP 9260 |
16.63 |
| 2026-04-08 12:00 |
01:57:52.51 |
+21:56:54.5 |
HIP 9260 |
16.41 |
| 2026-04-09 00:00 |
01:57:53.51 |
+21:56:58.5 |
HIP 9260 |
16.18 |
| 2026-04-09 12:00 |
01:57:54.51 |
+21:57:02.6 |
HIP 9260 |
15.96 |
| 2026-04-10 00:00 |
01:57:55.51 |
+21:57:06.7 |
HIP 9260 |
15.74 |
| 2026-04-10 12:00 |
01:57:56.51 |
+21:57:10.8 |
HIP 9260 |
15.52 |
| 2026-04-11 00:00 |
01:57:57.51 |
+21:57:15.0 |
HIP 9260 |
15.30 |
| 2026-04-11 12:00 |
01:57:58.52 |
+21:57:19.2 |
HIP 9260 |
15.08 |
| 2026-04-12 00:00 |
01:57:59.53 |
+21:57:23.4 |
HIP 9260 |
14.87 |
| 2026-04-12 12:00 |
01:58:00.54 |
+21:57:27.7 |
HIP 9260 |
14.65 |
| 2026-04-13 00:00 |
01:58:01.55 |
+21:57:32.0 |
HIP 9260 |
14.43 |
| 2026-04-13 12:00 |
01:58:02.56 |
+21:57:36.3 |
HIP 9260 |
14.21 |
| 2026-04-14 00:00 |
01:58:03.57 |
+21:57:40.6 |
HIP 9260 |
14.00 |
| 2026-04-14 12:00 |
01:58:04.59 |
+21:57:45.0 |
HIP 9260 |
13.78 |
| 2026-04-15 00:00 |
01:58:05.60 |
+21:57:49.4 |
HIP 9260 |
13.57 |
| 2026-04-15 12:00 |
01:58:06.62 |
+21:57:53.8 |
HIP 9260 |
13.35 |
| 2026-04-16 00:00 |
01:58:07.64 |
+21:57:58.2 |
HIP 9260 |
13.14 |