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
$$
M_a = (8.108 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
8.108 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.998 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
02:00:23.31 |
+22:13:25.9 |
HIP 9492 |
25.10 |
| 2026-07-29 12:00 |
02:00:23.25 |
+22:13:27.8 |
HIP 9492 |
25.12 |
| 2026-07-30 00:00 |
02:00:23.18 |
+22:13:29.7 |
HIP 9492 |
25.14 |
| 2026-07-30 12:00 |
02:00:23.11 |
+22:13:31.5 |
HIP 9492 |
25.17 |
| 2026-07-31 00:00 |
02:00:23.02 |
+22:13:33.3 |
HIP 9492 |
25.19 |
| 2026-07-31 12:00 |
02:00:22.93 |
+22:13:35.0 |
HIP 9492 |
25.22 |
| 2026-08-01 00:00 |
02:00:22.82 |
+22:13:36.7 |
HIP 9492 |
25.25 |
| 2026-08-01 12:00 |
02:00:22.71 |
+22:13:38.3 |
HIP 9492 |
25.29 |
| 2026-08-02 00:00 |
02:00:22.59 |
+22:13:39.9 |
HIP 9492 |
25.32 |
| 2026-08-02 12:00 |
02:00:22.47 |
+22:13:41.5 |
HIP 9492 |
25.36 |
| 2026-08-03 00:00 |
02:00:22.33 |
+22:13:43.0 |
HIP 9492 |
25.39 |
| 2026-08-03 12:00 |
02:00:22.18 |
+22:13:44.4 |
HIP 9492 |
25.43 |
| 2026-08-04 00:00 |
02:00:22.03 |
+22:13:45.9 |
HIP 9492 |
25.48 |
| 2026-08-04 12:00 |
02:00:21.87 |
+22:13:47.2 |
HIP 9492 |
25.52 |
| 2026-08-05 00:00 |
02:00:21.70 |
+22:13:48.6 |
HIP 9492 |
25.56 |
| 2026-08-05 12:00 |
02:00:21.52 |
+22:13:49.8 |
HIP 9492 |
25.61 |
| 2026-08-06 00:00 |
02:00:21.33 |
+22:13:51.1 |
HIP 9492 |
25.66 |
| 2026-08-06 12:00 |
02:00:21.14 |
+22:13:52.3 |
HIP 9492 |
25.70 |
| 2026-08-07 00:00 |
02:00:20.93 |
+22:13:53.4 |
HIP 9492 |
25.76 |
| 2026-08-07 12:00 |
02:00:20.72 |
+22:13:54.5 |
HIP 9492 |
25.81 |
| 2026-08-08 00:00 |
02:00:20.50 |
+22:13:55.5 |
HIP 9293 |
25.81 |
| 2026-08-08 12:00 |
02:00:20.27 |
+22:13:56.5 |
HIP 9293 |
25.80 |
| 2026-08-09 00:00 |
02:00:20.03 |
+22:13:57.5 |
HIP 9293 |
25.78 |
| 2026-08-09 12:00 |
02:00:19.78 |
+22:13:58.4 |
HIP 9293 |
25.77 |
| 2026-08-10 00:00 |
02:00:19.53 |
+22:13:59.3 |
HIP 9293 |
25.75 |
| 2026-08-10 12:00 |
02:00:19.26 |
+22:14:00.1 |
HIP 9293 |
25.73 |
| 2026-08-11 00:00 |
02:00:18.99 |
+22:14:00.8 |
HIP 9293 |
25.71 |
| 2026-08-11 12:00 |
02:00:18.71 |
+22:14:01.5 |
HIP 9293 |
25.69 |
| 2026-08-12 00:00 |
02:00:18.42 |
+22:14:02.2 |
HIP 9293 |
25.67 |
| 2026-08-12 12:00 |
02:00:18.13 |
+22:14:02.8 |
HIP 9293 |
25.64 |
| 2026-08-13 00:00 |
02:00:17.82 |
+22:14:03.4 |
HIP 9293 |
25.61 |
| 2026-08-13 12:00 |
02:00:17.51 |
+22:14:03.9 |
HIP 9293 |
25.59 |
| 2026-08-14 00:00 |
02:00:17.19 |
+22:14:04.4 |
HIP 9293 |
25.56 |
| 2026-08-14 12:00 |
02:00:16.86 |
+22:14:04.8 |
HIP 9293 |
25.53 |
| 2026-08-15 00:00 |
02:00:16.52 |
+22:14:05.2 |
HIP 9293 |
25.50 |
| 2026-08-15 12:00 |
02:00:16.17 |
+22:14:05.5 |
HIP 9293 |
25.46 |
| 2026-08-16 00:00 |
02:00:15.82 |
+22:14:05.8 |
HIP 9293 |
25.43 |
| 2026-08-16 12:00 |
02:00:15.45 |
+22:14:06.0 |
HIP 9293 |
25.39 |
| 2026-08-17 00:00 |
02:00:15.08 |
+22:14:06.2 |
HIP 9293 |
25.35 |
| 2026-08-17 12:00 |
02:00:14.70 |
+22:14:06.4 |
HIP 9293 |
25.32 |
| 2026-08-18 00:00 |
02:00:14.32 |
+22:14:06.4 |
HIP 9293 |
25.28 |
| 2026-08-18 12:00 |
02:00:13.92 |
+22:14:06.5 |
HIP 9293 |
25.23 |
| 2026-08-19 00:00 |
02:00:13.52 |
+22:14:06.5 |
HIP 9293 |
25.19 |