메타데이터
| 항목 |
값 |
| Designation |
C/2025 D1 (Groeller) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2028-05-18T08:26:24.901440Z |
| Orbit solution date (soln_date, UTC) |
2026-04-08T14:12:15Z |
| Obs used |
183 |
| NEO |
- |
| M1 |
5.300 |
| K1 |
8.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2025-02-20T07:52:55.833600Z |
| Discovery magnitude (MPC) |
20.64 G |
| Discovery observatory (MPC) |
V00 · Kitt Peak-Bok |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2024-04-23.0000000 |
| e |
1.00293203 |
| q (au) |
14.122734 |
| a (au) |
-4816.715820 |
| i (deg) |
84.497131 |
| Ω (om, deg) |
312.882118 |
| ω (w, deg) |
185.843793 |
| M (ma, deg) |
-0.004382 |
밝기
산란 + 전체 선형
$$
M_a = (3.713 + 3.384\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
3.713 |
| n |
3.384 |
| gf |
0.998 |
| gb |
-0.584 |
| k |
1.000 |
| 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 |
09:08:16.93 |
+27:22:58.3 |
HIP 44858 |
9.27 |
| 2026-07-29 12:00 |
09:08:24.33 |
+27:21:41.6 |
HIP 44920 |
9.65 |
| 2026-07-30 00:00 |
09:08:31.74 |
+27:20:25.0 |
HIP 44920 |
8.94 |
| 2026-07-30 12:00 |
09:08:39.15 |
+27:19:08.5 |
HIP 44920 |
8.67 |
| 2026-07-31 00:00 |
09:08:46.57 |
+27:17:52.2 |
HIP 44920 |
8.89 |
| 2026-07-31 12:00 |
09:08:54.00 |
+27:16:35.9 |
HIP 44920 |
9.56 |
| 2026-08-01 00:00 |
09:09:01.43 |
+27:15:19.8 |
HIP 44920 |
10.61 |
| 2026-08-01 12:00 |
09:09:08.87 |
+27:14:03.8 |
HIP 44920 |
11.93 |
| 2026-08-02 00:00 |
09:09:16.31 |
+27:12:47.9 |
HIP 44920 |
13.44 |
| 2026-08-02 12:00 |
09:09:23.76 |
+27:11:32.1 |
HIP 44920 |
15.09 |
| 2026-08-03 00:00 |
09:09:31.21 |
+27:10:16.5 |
HIP 44920 |
16.83 |
| 2026-08-03 12:00 |
09:09:38.66 |
+27:09:01.0 |
HIP 44920 |
18.64 |
| 2026-08-04 00:00 |
09:09:46.12 |
+27:07:45.6 |
HIP 44920 |
20.50 |
| 2026-08-04 12:00 |
09:09:53.58 |
+27:06:30.4 |
HIP 44920 |
22.39 |
| 2026-08-05 00:00 |
09:10:01.04 |
+27:05:15.3 |
HIP 44920 |
24.32 |
| 2026-08-05 12:00 |
09:10:08.50 |
+27:04:00.3 |
HIP 44920 |
26.27 |
| 2026-08-06 00:00 |
09:10:15.96 |
+27:02:45.5 |
HIP 44920 |
28.23 |
| 2026-08-06 12:00 |
09:10:23.43 |
+27:01:30.8 |
HIP 45178 |
28.17 |
| 2026-08-07 00:00 |
09:10:30.89 |
+27:00:16.2 |
HIP 45178 |
26.22 |
| 2026-08-07 12:00 |
09:10:38.36 |
+26:59:01.8 |
HIP 45178 |
24.28 |
| 2026-08-08 00:00 |
09:10:45.82 |
+26:57:47.5 |
HIP 45178 |
22.37 |
| 2026-08-08 12:00 |
09:10:53.28 |
+26:56:33.4 |
HIP 45178 |
20.49 |
| 2026-08-09 00:00 |
09:11:00.74 |
+26:55:19.4 |
HIP 45178 |
18.65 |
| 2026-08-09 12:00 |
09:11:08.20 |
+26:54:05.5 |
HIP 45178 |
16.86 |
| 2026-08-10 00:00 |
09:11:15.65 |
+26:52:51.8 |
HIP 45178 |
15.15 |
| 2026-08-10 12:00 |
09:11:23.10 |
+26:51:38.3 |
HIP 45178 |
13.53 |
| 2026-08-11 00:00 |
09:11:30.55 |
+26:50:24.9 |
HIP 45178 |
12.05 |
| 2026-08-11 12:00 |
09:11:37.99 |
+26:49:11.6 |
HIP 45178 |
10.77 |
| 2026-08-12 00:00 |
09:11:45.43 |
+26:47:58.5 |
HIP 45178 |
9.75 |
| 2026-08-12 12:00 |
09:11:52.86 |
+26:46:45.6 |
HIP 45178 |
9.10 |
| 2026-08-13 00:00 |
09:12:00.29 |
+26:45:32.8 |
HIP 45178 |
8.88 |
| 2026-08-13 12:00 |
09:12:07.71 |
+26:44:20.2 |
HIP 45178 |
9.12 |
| 2026-08-14 00:00 |
09:12:15.12 |
+26:43:07.7 |
HIP 45178 |
9.80 |
| 2026-08-14 12:00 |
09:12:22.53 |
+26:41:55.4 |
HIP 45178 |
10.82 |
| 2026-08-15 00:00 |
09:12:29.93 |
+26:40:43.3 |
HIP 45178 |
12.11 |
| 2026-08-15 12:00 |
09:12:37.32 |
+26:39:31.3 |
HIP 45178 |
13.57 |
| 2026-08-16 00:00 |
09:12:44.70 |
+26:38:19.5 |
HIP 45178 |
15.17 |
| 2026-08-16 12:00 |
09:12:52.07 |
+26:37:07.9 |
HIP 45178 |
16.86 |
| 2026-08-17 00:00 |
09:12:59.43 |
+26:35:56.4 |
HIP 45178 |
18.61 |
| 2026-08-17 12:00 |
09:13:06.78 |
+26:34:45.1 |
HIP 45178 |
20.42 |
| 2026-08-18 00:00 |
09:13:14.12 |
+26:33:34.0 |
HIP 45178 |
22.25 |
| 2026-08-18 12:00 |
09:13:21.45 |
+26:32:23.1 |
HIP 45304 |
23.49 |
| 2026-08-19 00:00 |
09:13:28.77 |
+26:31:12.3 |
HIP 45304 |
21.81 |